María U. Alzueta

University of Zaragoza | UNIZAR · Aragón Institute of Engineering Research (I3A). Department of Chemical and Environmental Engineering

The present work deals with an experimental and modeling analysis of the oxidation of ammonia–methane mixtures at high pressure (up to 40 bar) in the 550–1250 K temperature range using a quartz tubular reactor and argon as a diluent. The impact of temperature, pressure, oxygen stoichiometry, and CH4/NH3 ratio has been analyzed on the concentrations...

Motivado por la preocupación por el medio ambiente y la búsqueda de combustibles alternativos, en el presente trabajo se han investigado la combustión de las mezclas de amoniaco con H2 y CH4 a alta presión. Los resultados experimentales han sido simulados con un mecanismo detallado de reacción.

Alkyl nitrates thermally decompose by homolytic cleavage of the weak nitrate bond at very low temperatures (e.g., around 500 K at reaction times of a few seconds). This provides the opportunity to study the subsequent chemistry of the initially formed radical (or its subsequent pyrolysis products, if unstable) and nitrogen dioxide at such mild cond...

The interaction between NH3, CH4 and NO under different conditions of interest for combustion applications is analyzed, from both experimental and kinetic modeling points of view. Reduction of NO by reburn and by SNCR (selective non-catalytic reduction) strategies is evaluated, through an extense systematic study of the influence of the main variab...

The oxidation of acetylene (as soot precursor) and dimethyl ether (DME, as a promising fuel additive) mixtures has been analyzed in a tubular flow reactor, under high-pressure conditions (20, 40 and 60 bar), in the 450–1050 K temperature range. The effect of varying the air excess ratio (λ≈0.7, 1 and 20) and the percentage of DME with respect to ac...

The present work addresses the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere, characteristic of oxy-fuel processes and/or biogas combustion, from both experimental and kinetic modelling points of view. A parametric study of NH3 and NH3/NO mixtures oxidation is carried out, evaluating the influence of the temperature (70...

In the present work, experimental results from the literature on the effect of CO on the NH3 oxidation in the absence and presence of NO are supplemented with novel flow reactor results and interpreted in terms of a detailed chemical kinetic model. The kinetic model provides a satisfactory prediction over a wide range of conditions for oxidation in...

The high-pressure oxidation of acetylene-dimethoxymethane (C2H2-DMM) mixtures in a tubular flow reactor has been analyzed from both experimental and modeling perspectives. In addition to pressure (20, 40, and 60 bar), the influence of the oxygen availability (by modifying the air excess ratio, λ) and the presence of DMM (two different concentration...

An experimental and modeling study of the oxidation at high pressure of dimethyl carbonate (DMC) has been performed in a quartz tubular flow reactor. Experimental and simulated concentrations of DMC, CO, CO2 and H2 have been obtained for different temperatures (500–1073 K), pressures (20, 40, and 60 atm) and stoichiometries (λ = 0.7, 1, and 35). Bo...

The present work is focused on the analysis of the ammonia oxidation process and the formation of main nitrogen oxides (NO, NO2 and N2O) over a wide range of temperatures and O2 reaction environments. Experiments are performed at atmospheric pressure in a laboratory quartz tubular flow reactor, covering the temperature range of 875 to 1450 K and fo...

The interaction between ammonia and NO under combustion conditions is analyzed in the present work, from both experimental and kinetic modelling points of view. An experimental systematic study of the influence of the main variables for the NH3NO interaction is made using a laboratory tubular flow reactor installation. Experiments are performed at...

The present study deals with the oxidation of H2S/NO mixtures, in the temperature range of 475–1400 K, at atmospheric pressure and 20 bar of manometric pressure. The experiments have been performed in two different set-ups, using tubular flow reactors, for different air excess ratios (λH2S = 0.3–6). A kinetic model has been updated with recent reac...

The present study deals with the oxidation of H2S at high pressures. In some local scenarios, combustion is seen as an alternative possibility for the use of sour gas mixtures containing H2S. Therefore, further research is needed in terms of H2S oxidation characteristics and kinetics, which might be useful for existing processes like the Claus proc...

The occurrence and distribution of polycyclic aromatic hydrocarbons (PAH) have been investigated in the products derived from the pyrolysis of pig manure at low temperatures (<550 °C) in a fixed bed reactor. The focus was on the sixteen PAH identified as priority pollutants by the US Environment Protection Agency (EPA). The pyrolysis does not gener...

The possibility of using ammonia (NH3), as a fuel and as an energy carrier with low pollutant emissions, can contribute to the transition to a low-carbon economy. To use ammonia as fuel, knowledge about the NH3 conversion is desired. In particular, the conversion of ammonia under pyrolysis conditions could be determinant in the description of its c...

Biomass gasification offers a significant potential to close the loop of agriculture and many other activities that produce biomass residues. Pig manure, a residue produced in farms, has a huge pollutant potential due to its high production and chemical characteristics. It is necessary to take some control measures to decrease it, being pig manure...

This contribution reports experimental measurements of the oxidation of H2S and CH3SH, under atmospheric pressure in a jet-stirred reactor (JSR), in the temperature range of 600–1100 K and for stoichiometric and oxidizing conditions. We update a recent kinetic model, originally developed based on the measurements of oxidation of H2S and CH3SH in a...

The effect of the H2S presence on the formation of six different sulphurated polycyclic hydrocarbons (S-PAH), during the pyrolysis of ethylene-H2S mixtures, has been studied in a tubular flow reactor installation. Experiments with different inlet H2S concentrations (0.3, 0.5 and 1%) and temperatures of reaction (between 1075 and 1475 K) have been c...

Oxidation of acetonitrile has been studied in a flow reactor in the absence and presence of nitric oxide. The experiments were conducted at atmospheric pressure in the temperature range 1150–1450 K, varying the excess air ratio from slightly fuel-lean to very lean. Oxidation of CH3CN was slow below 1300 K. Nitric oxide, hydrogen cyanide and nitrous...

Due to the different scenarios where sour gas is present, its composition can be different and, therefore, it can be exploited through different processes, being combustion one of them. In this context, this work deals with the oxidation of CH4 and H2S at different pressures and under a wide variety of conditions. The oxidation has been evaluated e...

The combustion of fossil fuels produces pollutants such as soot, which consists of carbonaceous particles whose emission is regulated by environmental laws. Soot is mainly formed from polycyclic aromatic hydrocarbons (PAH), through different reaction ways and, once formed, it can adsorb PAH on its surface. These compounds have an environmental impo...

Nowadays, diesel vehicles include exhaust treatment technologies, such as diesel particulate filters (DPF), to meet the emission limitations of soot. Within the particle trap, soot can be oxidized by interaction with nitrogen oxides (NOx). The extent of this interaction will depend on the specific conditions at the trap, the nitrogen oxide consider...

The oxidation of H2S at different manometric pressures (0.6–40 bar), in the temperature range of 500–1000 K and under slightly oxidizing conditions (λ = 2), has been studied. Experiments have been performed in a quartz tubular flow reactor. The results have shown that H2S conversion shifts to lower temperatures as the pressure increases. The kineti...

Alkylated furan derivatives, such as 2,5-dimethylfuran (2,5-DMF) and 2-methylfuran (2-MF), have shown, at laboratory scale, a relatively high tendency to form soot. However, soot emissions from diesel engines are lower when diesel/2,5-DMF and diesel/2-MF blends are used. This could indicate that the soot produced in the conversion of these compound...

This work evaluates the emissions of polycyclic aromatic hydrocarbons (PAH) from a domestic pellets-fired boiler. Three biomass residues, pine sawdust, cork residues and kiwi residues, were used in this work. The experiments were carried out at three boiler thermal inputs (10, 14 and 17 kW). The PAHs were collected from the flue gas using a resin (...

El proyecto TRAFAIR reúne a 9 socios de España e Italia para desarrollar servicios innovadores empleando datos de calidad del aire, condiciones meteorológicas y de flujos de tráfico, en beneficio tanto de los ciudadanos, como de las autoridades responsables de la toma de decisiones que afectan a la calidad del aire.

The use of non-conventional fuel sources, such as shale gas, brings new research requisites for its proper use in an environmental friendly manner. In this context, shale gas may include different sulphur containing compounds, such as methanethiol, that is also formed as intermediate during sulphur containing residues processing. The present work i...

The oxidation of n-pentane (C5H12) in different bath gases (He, Ar, CO2) and in Ar with NO2 or NO addition has been studied in a jet-stirred reactor at 107 kPa, temperatures between 500 1100 K, with a fixed residence time of 2.0 s, under stoichiometric conditions. Four different quantification diagnostics were used: gas chromatography, chemilumines...

Research in solid-gas heterogeneous catalytic processes is typically aimed toward optimization of catalyst composition to achieve a higher conversion and, especially, a higher selectivity. However, even with the most selective catalysts, an upper limit is found: Above a certain temperature, gas-phase reactions become important and their effects can...

The present study deals with the oxidation of H2 at high pressure and its interaction with NO. The high pressure behavior of the H2/NOx/O2 system has been tested over a wide range of temperatures (500–1100 K) and different air excess ratios (λ = 0.5–6.4). The experiments have been carried out in a tubular flow reactor at 10, 20 and 40 bar NO has be...

This paper reports the first online gas phase detection of absolute concentrations of HONO under engine relevant conditions, during the oxidation of an alkane in the presence of NO x . The detection was achieved at laboratory scale thanks to the coupling of a jet-stirred reactor to a continuous-wave Cavity Ring-Down Spectroscopy cell. The evidence...

The role of CO2 on the moist oxidation of CO in the CO-NO and CO-NO2 systems is analyzed from both experimental and modelling points of view, under flow reactor conditions, at atmospheric pressure, over the temperature range of 700–1400 K and at fuel-rich (λ = 0.5) and fuel-lean (λ = 2) environments. Sensitivity and reaction rate analyses were used...

Oxygenated polycyclic aromatic hydrocarbons (oxy-PAH) and sulphurated polycyclic aromatic hydrocarbons (S-PAH) formation during pyrolysis experiments of mixtures of ethylene (3%) and several SO2 concentrations (0.3 to 1%), at different reaction temperatures (1075 to 1475 K), was studied. The sixteen EPA-PAH priority pollutants, classified by the En...

The high-pressure dimethyl ether (DME, CH3OCH3) oxidation has been investigated in a plug flow reactor in the 450–1050 K temperature range. Different pressures (20, 40 and 60 bar), air excess ratios (λ = 0.7, 1 and 35), and the absence/presence of NO have been tested, for the first time under these conditions. An early reactivity of DME and a negat...

The many simultaneous processes occurring within in a diesel engine make difficult a thorough understanding of the mechanisms responsible for reduction of soot and/or NOX when an oxygenated compound is added to diesel fuel. Thus, in order to explore the use of oxygenated compounds as biofuels/additives, it is interesting to study their conversion u...

The effect of temperature and gas residence time on the formation of 16 priority PAH from the ethanol pyrolysis, in the 975–1475 K temperature range, has been evaluated. Soot was quantified by weight difference of the collection filter and light gases were measured by gas chromatography and microchromatography. The PAH quantification was done by ga...

An experimental and modeling study of the oxidation of acetylene-ethanol mixtures under high-pressure conditions (10-40 bar) has been carried out in the 575-1075 K temperature range, in a plug flow reactor. The influence on the oxidation process of the oxygen inlet concentration (determined by the air excess ratio, λ) and the amount of ethanol (0-2...

Ethanol has become a promising biofuel, widely used as a renewable fuel and gasoline additive. Describing the oxidation kinetics of ethanol with high accuracy is required for the development of future efficient combustion devices with lower pollutant emissions. The oxidation process of ethanol, from reducing to oxidizing conditions, and its pressur...

The oxidation of neat methane (CH4) and CH4 doped with NO2 or NO in argon has been investigated in a jet-stirred reactor at 107 kPa, temperatures between 650 and 1200 K, with a fixed residence time of 1.5 s, and for different equivalence ratios (Φ), ranging from fuel-lean to fuel-rich conditions. Four different diagnostics have been used: gas chrom...

The reaction of C2H2 with NO2 has been studied theoretically. It is a complex overall reaction with multiple wells and multiple product channels. The calculated rate constant for the preferred channel, formation of a CHOCHON adduct, is compatible with the only experimental determination. The CHOCHON adduct is assumed to dissociate rapidly to form t...

Oxidation of H2S at atmospheric pressure has been studied under different reaction atmospheres, varying the air excess ratio (λ) from reducing (λ = 0.32) to oxidizing conditions (λ = 19.46). The experiments have been carried out in a tubular flow reactor, in the 700-1400 K temperature range. The concentrations of H2S, SO2 and H2 have been determine...

El trabajo realizado tiene como objetivo el estudio experimental y modelado cinético de la oxidación de sulfuro de hidrógeno (H2S) a alta presión (1.6, 10 y 20 bar) y en un intervalo de temperaturas de 450-1050 K. Los resultados han sido simulados con el software Chemkin-Pro usando un mecanismo detallado de reacción desarrollado previamente por el...

El trabajo realizado tiene como objetivo el estudio experimental de la formación de hollín a partir de la pirólisis de 1-butanol (C4H9OH) a distintas temperaturas y en condiciones de laboratorio controladas, así como la caracterización de las muestras de hollín obtenidas considerando sus características eco-toxicológicas.

Biogas (mainly methane and carbon dioxide) produced from biomass anaerobic digestion is considered as a potential renewable gas-phase fuel. That is why the study of the mutual effects of CH4/NOx have attracted considerable attention in the past decade. In this work, the oxidation of methane with and without NOx addition has been investigated in a j...

Ignition delay times of dimethyl carbonate DMC were measured using low- and high-pressure shock tubes and in a rapid compression machine (RCM). In this way, the effect of fuel concentration (0.75% and 1.75%), pressure (2.0, 20, and 40 atm) and equivalence ratio (0.5, 1.0, 2.0) on ignition delay times was studied experimentally and computationally u...

Since the recent discoveries in the high efficiency production methods of 2,5-dimethylfuran (2,5-DMF) and 2-methylfuran (2-MF), and due to their good physicochemical properties, these alkylated furan derivatives have been highly considered as fuels or additives in gasoline and diesel engines. However, the cyclic structures of 2,5-DMF and 2-MF may m...

This work shows a study of the reactivity of twelve different types of soot with either NO2 or O2 under reacting conditions typically present in diesel particulate filters (DPFs). The soot samples were obtained from the combustion of four conventional and alternative fuels (diesel, biodiesel and two paraffinic fuels) in a diesel engine bench operat...

This work focuses on the combustion behavior of raw and demineralized grape pomace, and grape pomace doped with 0.1, 0.5, 0.82 (equal to the K concentration in the raw biomass), 3 and 6 wt.% of K, and 0.1, 0.5, 1.08 (equal to the Ca concentration in the raw biomass), 3 and 6 wt.% of Ca. To identify the individual role of calcium and potassium, the...

The main objective of this work is to evaluate the effects of potassium (K) and calcium (Ca) on the early stages of combustion of single biomass particles. The biomass used was grape pomace, sieved in the size range of 200-250μm. With the pre-treatments of demineralization and impregnation, a total of 12 different samples were obtained: raw grape p...

The objective of this work is to investigate experimentally the formation of polycyclic aromatic hydrocarbons (PAH) during the combustion of biomass in a drop tube furnace (DTF). A number of biomass fuels, including furniture residues, grape pomace, kiwi residues, olive residues, wheat straw, rice husk and platanus residues were used in this work,...

The formation of polycyclic aromatic hydrocarbons (PAHs) and soot from the pyrolysis of the four butanol isomers: 1-butanol, 2-butanol, iso-butanol and tert-butanol, at three reaction temperatures (1275, 1375 and 1475 K) has been studied. The identification and quantification of the sixteen PAHs, classified by the Environmental Protection Agency (E...

Uno de los principales contaminantes que se generan en la cámara de combustión de los motores diésel son los óxidos de nitrógeno (NOx) y el hollín, por ello en la actualidad se utilizan filtros o trampas de partículas que sirven para retener la materia particulada (hollín) cuando los gases de escape circulan a su través. Este estudio tiene como obj...

Se ha estudiado la oxidación de 1-butanol en diferentes condiciones de estequiometría. El aumento de la cantidad de oxígeno produce un desplazamiento de la oxidación hacia temperaturas más bajas y disminuye la producción de hidrocarburos. Se ha desarrollado un modelo cinético que simula los resultados experimentales obtenidos y describe la oxidació...

Saturated cyclic ethers are being proposed as next-generation bio-derived fuels. However, their pyrolysis and combustion chemistry has not been well established. In this work, the pyrolysis and combustion chemistry of 2-methyl-tetrahydrofuran (MTHF) was investigated through experiments and detailed kinetic modeling. Pyrolysis experiments were perfo...

Dimethyl ether (DME) is a promising diesel fuel additive for reducing soot and NOx emissions, because of its interesting properties and the possibility of a renewable production. An experimental and modeling study of the oxidation of acetylene (C2H2, considered as an important soot precursor) and DME mixtures has been performed under well-controlle...

Oxygenated compounds have gained interest in the last few years because they represent an attractive alternative as additive to diesel fuel for reducing soot emissions. Although dimethyl carbonate (DMC) seems to be a good option, studies about its propensity to form soot, as well as the knowledge of the characteristics of this soot are still missin...

The formation of the 16 polycyclic aromatic hydrocarbons (PAH), classified as priority pollutants by the Environmental Protection Agency (EPA), has been studied in the pyrolysis of dimethyl carbonate (DMC) at different reaction temperatures (1075-1475K). PAH have been quantified by gas chromatography-mass spectrometry (GC-MS). The PAH speciation sh...

Fuel reformulation through the use of oxygenated compounds has been considered as an interesting option both, to reduce the harmful soot emissions and to overcome the dependence on fossil fuels, since many of them are bio-derived fuels. Dimethyl carbonate (DMC) is of interest as oxygenated fuel additive since it presents a relative high oxygen cont...

The formation of light gases, soot and 16 polycyclic aromatic hydrocarbons (EPA-PAH), classified as priority pollutants by the United States Environmental Protection Agency (US-EPA), has been studied during the pyrolysis of mixtures of ethylene with hydrogen sulphide (H2S) in a tubular flow reactor setup. The study was made using a constant concent...

A detailed chemical kinetic model for oxidation of acetylene at intermediate temperatures and high pressure has been developed and evaluated experimentally. The rate coefficients for the reactions of C2H2 with HO2 and O2 were investigated, based on the recent analysis of the potential energy diagram for C2H3 + O2 by Goldsmith et al. and on new ab i...

Low speed marine Diesel engines are mostly operated on heavy fuel oils, which have a high content of sulfur and ash including trace amounts of vanadium, nickel, and aluminum. In particular vanadium oxides could to catalyze in-cylinder oxidation of SO2 to SO3, promoting formation of sulfuric acid and enhancing problems of corrosion. In the present w...

The simultaneous reduction of NOx and soot emissions from diesel engines is a major research subject and a challenge in today’s world. One prospective solution involves diesel fuel reformulation by addition of oxygenated compounds, such as dimethoxymethane (DMM). In this context, different DMM oxidation experiments have been carried out in an atmos...

This study aims to evaluate the capability of SO2 to interact with soot and to determine the kinetics of this reaction under conditions of interest for combustion. The conditions of the soot reactivity experiments were: 1% SO2 with nitrogen to balance, around 10 mg of soot, and different reaction temperatures for each run: 1275, 1325, 1375, 1425, a...

The sooting tendency of 2,5-dimethylfuran (2,5-DMF), as a proposed fuel or fuel additive, has been studied in a flow reactor at different reaction temperatures (975, 1075, 1175, 1275, 1375, and 1475 K) and inlet 2,5-DMF concentrations (5000, 7500, and 15,000 ppm) under pyrolytic conditions. The quantification of soot and light gases has been done....

The formation of soot and 16 priority polycyclic aromatic hydrocarbons (PAH) has been studied during the pyrolysis of 2-methylfuran (2-MF), with a constant 2-MF inlet concentration at different reaction temperatures (975–1475 K) in a tubular flow reactor installation. Light gases and soot were measured at the reactor outlet. The concentration of th...

The formation of polycyclic aromatic hydrocarbons (PAH) and soot from the pyrolysis of ethylene in the presence of different amounts of sulphur dioxide (SO2) and at different reaction temperatures (1075–1475 K) was studied. The sixteen PAH classified by the Environmental Protection Agency (EPA) as priority pollutants were quantified by gas chromato...

The knowledge of NOx concentration in the exhaust gas of an oxy-fuel combustion system is very important for an appropriate design of the subsequent carbon capture process. NOx final emissions in oxy-fuel combustion depend on the reburn reactions of the recycled NO when it returns to the boiler. HCN is the main intermediate during this process, and...

This paper reports new experimental and numerical data for the pyrolysis and combustion of tetrahydropyran (THP) – a model component for next-generation heterocyclic oxygenated fuels. Pyrolysis experiments were performed using a plug flow reactor at 170 kPa, over the temperature range 913–1133 K at residence times of approximately 0.5 and 0.2 s, wi...

2-methylfuran (2-MF) has become of interest as biofuel because of its properties and the improvement in its production method, and also because it is an important intermediate in the conversion of 2,5-dimethylfuran. In this research, an experimental and kinetic modelling study of the oxidation of 2-MF in the absence and presence of NO has been perf...

Abstract The oxidation of simulated natural gas mixtures, methane and ethane under oxy-fuel conditions has been studied experimentally in a flow reactor, at atmospheric pressure and in the 773-1673 K temperature range. The influence of the stoichiometry has been analyzed by varying the excess air coefficient (λ) from fuel-rich (λ = 0.2) to fuel-lea...

Abstract The present work focuses on the evaluation of the effect of the presence of SO2 on the formation of soot from ethylene pyrolysis. The work includes the experimental study of ethylene pyrolysis in the presence of different amounts of SO2 in a quartz flow reactor, at atmospheric pressure in the temperature interval of 975-1475 K, and the kin...

We have conducted flow reactor experiments for NO formation from N2/O2 mixtures at high temperatures and atmospheric pressure, controlling accurately temperature and reaction time. Under these conditions, atomic oxygen equilibrates rapidly with O2. The experimental results were interpreted by a detailed chemical model to determine the rate constant...

The oxidation of dimethoxymethane (DMM) has been studied under a wide range of temperatures (373-1073 K), pressures (20-60 bar) and air excess ratios (λ=0.7, 1 and 20), from both experimental and modeling points of view. Experimental results have been interpreted and analyzed in terms of a detailed gas-phase chemical kinetic mechanism for describin...

Carbon disulfide (CS2) and carbonyl sulfide (COS) can be generated from sulfur-containing species in a combustion chamber, and thus may be present at the exhaust gas and even emitted to the atmosphere. Therefore, it is of great interest to study and understand the mechanism through which the conversion of CS2 and COS takes place under combustion co...

This work concentrates on the pyrolysis and char characterization of a refuse derived fuel (RDF), produced from municipal solid waste, and five of its components, namely, non-packaging paper, food, textile, low-density polyethylene film, LDPE, and packaging polypropylene wastes. Specifically, this work characterizes physically and chemically the ma...

Tetrahydrofuran (THF) is a well suited starting point fuel to study the combustion chemistry of saturated cyclic esters that are being considered as promising bio-fuels. To better understand the combustion chemistry of THF, laminar low-pressure premixed flame structure, atmospheric adiabatic laminar burning velocities, and high-pressure ignition de...

Soot fouling on exhaust gas recirculation coolers (EGRc) decreases thermal efficiency, implying the unfulfillment of NOx standards, and increases the pressure drop producing the malfunctioning of this device. The characterization of soot is of great interest since soot physico-chemical properties may have a direct influence on the degree of malfunc...

The main objective is to study the 16 EPA-PAH and soot formed in the pyrolysis of different kinds of oxygenated compounds.

An experimental and modeling study of the influence of pressure on the oxidation of methyl formate (MF) has been performed in the 1-60 bar pressure range, in an isothermal tubular quartz flow reactor in the 573-1073 K temperature range. The influence of stoichiometry, temperature, pressure, and presence of NO on the conversion of MF and the formati...

The influence of those gaseous compounds that can be typically present in combustion processes with flue gas recirculation (FGR) techniques: CO2, H2O, CO, NO, NO2, N2O and SO2, on ethylene conversion was analyzed through an experimental and modeling study. Ethylene oxidation experiments in the presence of the different gaseous compounds were carrie...

The main objetive is to carry out the pyrolysis of DMM and analyze gases, soot and PAH formed.

In the present work, the interaction between 2,5-dimethylfuran (2,5-DMF) and NO has been investigated. The study includes experimental and modeling data on the evaluation of the influence of the temperature, stoichiometry, and 2,5-DMF concentration on the NO conversion as well as on the 2,5-DMF conversion in the presence of NO. The experiments were...

In order to contribute to the study of the behavior of 2,5-dimethylfuran (2,5-DMF), a promising biofuel to be used as fuel or additive in automotive applications, an experimental and kinetic modeling study of the pyrolysis and oxidation of 2,5-DMF has been carried out using well controlled flow reactor installations. The influence of temperature, s...

The aim of this kinetic work is a critical and detailed analysis of the acetylene pyrolysis in a wide range of conditions, especially from 900 to 2500 K, in order to further validate and refine the kinetic mechanism of C2–C4 acetylenic species. In particular, the successive reactions of the intermediate products, such as C4 species and polyynes, we...

The emission of both nitrogen oxides and soot from combustion processes is still a matter of concern. When a flue gas recirculation (FGR) technique is applied, the presence of a given nitrogen oxide in the recirculated mixture can affect the emissions of other pollutants, such as soot, and be used for its control in a combustion process. In this co...

This article describes an experimental investigation of the oxidation behavior of particulate matter (PM) sampled with the aid of a rapid dilution probe from a number of measurement positions located in the near the burner region of a domestic wood pellet-fired boiler. Morphology and chemical composition of the collected PM samples were examined in...

The outlet stream from combustion processes is a complex mixture of compounds which depends on the specific operating conditions. Thermochemical processes operating under rich fuel conditions enhance the formation of polycyclic aromatic hydrocarbons (PAHs) and soot. PAH play an important role in soot formation, but they can appear adsorbed on soot...