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Introduction
Publications
Publications (41)
The production of platform chemicals via carbon negative technologies will play an important role in global efforts to mitigate climate change. Succinic acid biorefineries are commercially mature carbon negative technologies that are plagued with large waste streams in the form of hemicellulose and gypsum. Here, a techno-economic analysis assesses...
Amine-based carbon dioxide capture is the most mature technology for reducing flue gas CO2 emissions. It has been postulated and observed during commercialisation of this technology that significant quantities of waste amines are produced. Further industrial implementation of this technology requires adequate disposal or valorisation options for th...
The successful implementation of the leading technology for post combustion capture (PCC) of carbon dioxide (CO2), i.e. absorption/desorption using alkanolamines, still faces several challenges. For countries like Australia, that do not have flue gas desulfurization (FGD) installed at coal-fired power stations, removal of acid gases stronger than C...
Dynamic (or flexible) operation has been proposed as a strategy to reduce the impact of integrating post-combustion CO2 capture (PCC) into power plants. It provides a means for counteracting ongoing variations in the composition of flue gas and absorbent, and also accounts for dynamic variations in carbon and electricity pricing, and electricity de...
This chapter discusses the importance of flue-gas treatment and the effect of its impurities on post-combustion CO2 capture (PCC) process performance. Important consequences of nonoptimized flue-gas treatment include atmospheric emissions, amine degradation, extra maintenance requirements through corrosion or fly ash deposition, and waste handling....
Degradation of aqueous amines during post-combustion capture (PCC) of CO2 from fossil-fuel flue gases by wet gas scrubbing can lead to reduced energy efficiency, operational instability, increased corrosion, and unwanted emissions to the environment. Oxidative amine degradation and the accumulation of heat-stable salts primarily occur during absorp...
As the development of chemical absorption technology for post-combustion capture (PCC) of CO2 from coal-fired power station flue gases proceeds towards commercial deployment, the focus on establishing a thorough understanding of the degradation of the aqueous amine absorbents is increasing. However, there is a need to develop and demonstrate robust...
Monoethanolamine (MEA) is the solvent most commonly considered for post-combustion capture. However, the solvent will accumulate a range of contaminants during use, notably heat stable salts, that reduce its performance. This work considers the removal of these contaminants from MEA solutions that had been exposed to over 50 and 1800h of post combu...
Post-combustion capture (PCC) of CO2 from fossil fuel-fired power station flue gas is one of many technologies that are being developed to reduce anthropogenic greenhouse gas emissions in the medium term. Wet-gas scrubbing using aqueous amines is currently the most mature PCC technology suitable for separating CO2 from coal-fired power station flue...
The use of aqueous amines, such as MEA (monoethanolamine, 2-aminoethanol), for PCC (post combustion capture) of CO2 from fossil-fuel fired power station flue gases leads to undesirable reactions with oxygen, SOx and NOx. This study has used a GC-MS method to measure the changes in concentrations of organic compounds in samples of a 30% (w/w) aqueou...
Amine degradation is an important and current focus in the development of chemical absorption technology based on the use of aqueous amines for post-combustion capture (PCC) of CO2. The oxidative degradation and carbamate polymerisation of monoethanolamine (the current industry standard amine for PCC) has been studied extensively at the laboratory...
Flexible operation of post-combustion CO2 capture (PCC) plants can improve efficiency through coordinating the balance between consumer demands for electricity and CO2 emission reductions. This strategy however, will impose process disturbances and the immediate and long term impact is unclear. There is a justified need for the development of accur...
The presence of SO2 in flue gas has a negative impact on typical CO2 capture processes utilising aqueous amines. For countries like Australia, that do not have flue gas desulfurisation, retrofitting such equipment to existing coal fired power stations is of the order of 100's of millions of dollars. In this work a new process configuration is descr...
The presence of SO2 in flue gas has a negative impact on typical CO2 capture processes utilising aqueous amines. For countries like Australia, that do not have flue gas desulphurisation, retrofitting such equipment to existing coal fired power stations is of the order of 100s of millions of dollars. In this work a new process configuration is descr...
The availability of reliable analytical methods for measuring amine concentrations are necessary for optimum operation of aqueous amine CO2 separation systems being employed for post-combustion capture (PCC) of CO2. A GC-FID (gas chromatography – flame ionization detection) method is described for reliable quantification of 30% (w/w) monoethanolami...
The drive for efficiency improvements in post-combustion CO2 capture (PCC) technologies continues to grow, with recent attention being directed towards flexible operation of PCC plants. However, there is a lack of research into the effect of process disturbances when operating flexibly, justifying a need for validated dynamic models of the PCC proc...
Monoethanolamine (MEA) is a well-established absorption liquid used in post-combustion capture (PCC) technology that has a high rate of reaction with CO2. However, an absorption liquid with improved properties, such as less degradation, less corrosion and a lower energy requirement for solvent regeneration, would greatly benefit the PCC process. An...
A comprehensive experimental investigation of emissions concentrations of selected PCC liquors and process gas streams has been completed at the AGL Loy Yang Power Station using the CSIRO Loy Yang pilot-scale post-combustion capture (PCC) plant (LYPP). The benchmark solvent, monoethanolamine (MEA), was used to capture CO2 from the process gas of th...
An important step towards commercial scale post-combustion CO2 capture from coal-fired power stations is understanding solvent degradation. Laboratory scale trials have identified three main solvent degradation pathways for 30% MEA: oxidative degradation, carbamate polymerization and formation of heat stable salts. This paper probes the semi-volati...
Flexible operation of post-combustion CO2 capture (PCC) plants can improve efficiency through coordinating the balance between consumer demands for electricity and CO2 emission reductions. This strategy however, will impose process disturbances while the PCC plant is ramped up, ramped down or turned off. This paper presents the preliminary developm...
Post Combustion Capture (PCC) and storage of CO2 with amines is arguably the best available technology for mitigation of rising atmospheric concentrations of CO2. However, a number of serious operational issues threaten its utility. Among these is corrosion of PCC plant in which degradation of amines, particularly in the presence of oxygen, can lea...
Chemical reactive liquid absorption in post-combustion carbon capture (PCC) has sparked an interest of many researchers for improvement in creating high CO2 absorption capacity and minimising the reboiler heat duty for regeneration.This paper discusses results from performance trials on different solvents: mono-ethanolamine (MEA-baseline), a mixtur...
Chemical absorption with aqueous amine solvents is the most advanced technology for postcombustion capture (PCC) of CO(2) from coal-fired power stations and a number of pilot scale programs are evaluating novel solvents, optimizing energy efficiency, and validating engineering models. This review demonstrates that the development of commercial scal...
Post-combustion Carbon Capture (PCC) is a key technology in a complete CO 2 capture and storage (CCS) chain. Reactive liquid absorption processes are currently the most advanced, both in commercial and technological terms. The area of improved solvents for CO 2 is a focal point in many R&D programmes, in addition to more efficient PCC process engin...
Using membrane gas absorption (MGA) the absorber for capturing CO2 from flue gas can be five to ten times smaller than conventional packed absorber columns. With the working principles of MGA, the whole process itself becomes intrinsically more stable. The large-scale application of CO2-removal technology followed by long-term CO2 storage can becom...
Various types of ethylene–propylene-diene terpolymers (EPDM) and crosslinking procedures have been investigated with pervaporation, vapor sorption, liquid sorption and gas permeation experiments. The EPDM parameters that have been changed are ethylene content, molecular weight, choice of third monomer, type of branching and various crosslinking pro...
The present invention relates to a method for fractionating a liquid mixture containing a low boiling (most volatile) and high-boiling (least volatile) component, in which use is made of membrane contactors. The liquid mixture is passed through a Iiquid channel of a membrane contactor whereby a vapor enriched in low-boiling component and a liquid e...
The resistances-in-series model, the modified solution-diffusion model, the Flory–Rehner theory, and the film theory were used to calculate the diffusion coefficients of two components of a liquid-feed mixture that are separated by pervaporation. The toluene and water fluxes through EPDM membranes of various thicknesses were modeled for different m...
Sodium hypochlorite solutions are used to treat membranes prepared from a polymeric blend containing poly(vinyl pyrrolidone) (PVP) to increase their water permeability. Sodium hypochlorite affects the membrane material in such a way that PVP is selectively removed from the membrane matrix. The mechanism of the reaction between hypochlorite and PVP...
