Cuong Duong Viet

University of Strasbourg | UNISTRA · Institut de chimie et procédés pour l’énergie, l’environnement et la santé (ICPEES)

Chemical recycling to produce back light olefins, ethylene and propylene, is of high interest to reduce the use of fossil and allows the direct re-use of waste plastic with a concomitant reduction of associated carbon footprint. Bobine SAS, a spin-off of ICPEES, joint research unit of CNRS and the University of Strasbourg, Blackleaf and Sicat, aims...

The large-scale production of hydrogen and the direct sequestration of carbon, in solid form, from the decomposition of natural gas could constitute an attractive economic alternative for the production of hydrogen if deactivation by coke or sintering could be mitigated. Here, we report on the use of a 2D graphene-based catalyst with controlled mac...

Carbon-based catalyst can effectively crack model waste plastic based on polyolefins under contactless induction heating and yield gaseous and liquid hydrocarbons fractions at mild reaction temperatures. High catalytic performances are reached thanks to the stable catalyst bed temperature arising from the high heating rate of the induction setup. B...

In this report induction heating was used for the catalytic chemical vapor decomposition synthesis of carbon nanofibers (CNFs) on Ni-based catalyst. The CNFs were produced with a high yield at a relatively low temperature compared to that observed for conventional heating through convection and conduction. The process also occurred in the absence o...

Undoped nickel-based catalysts supported on depleted uranium oxide allow one to carry out CO2 methanation process under extremely low reaction temperature under atmospheric pressure and powered by a contactless induction heating. By adjusting the reaction conditions, the catalyst is able to perform CO2 methanation reaction under autothermal process...

Invited for this month's cover are collaborating teams from academia—the French ICPEES and IS2M of Centre national de la recherche scientifique (CNRS) and the Italian ICCOM of Consiglio Nazionale delle Ricerche (CNR)—and industry with the participation of the ORANO group. The cover picture shows a CO2‐to‐CH4 process promoted by nickel nanoparticles...

The Front Cover shows nickel nanoparticles supported on depleted uranium oxide (DU) beads as effective and durable “microreactors” for promoting CO2 methanation. DU allows a controlled management of the extra heat generated by the process’ exothermicity, harvesting it, and turning it back as additional energy for running the process itself. As a re...

Macroscopic nitrogen-doped mesoporous carbon coated silicon carbide catalyst (NMC/SiC) has been developed and fully evaluated as metal-free catalyst for selective oxidation of H2S into elemental sulfur under various conditions using...

The use of CO2 methanation in the power-to-gas (PtG) technology chains has received increasing attention in recent years for clean energy and sustainable development. In this work, macroscopic mesoporous nickel catalyst was prepared and evaluated for selective CO2 hydrogenation to CH4 using commercial activated carbon (AC) pellets. Catalyst samples...

Ni‐based catalysts prepared through impregnation of depleted uranium oxides (DU) have successfully been employed as highly efficient, selective, and durable systems for CO2 hydrogenation to substituted natural gas (SNG; CH4) under an autothermal regime. The thermo‐physical properties of DU and the unique electronic structure of f‐block metal‐oxides...

The structure of catalyst containing Ni nanoparticles (NPs) supported over carbon nanofibers/few layer graphene (CNFs/FLG) was tailored via modification of chemical vapor deposition parameters in view of methanation of CO2 under induction heating mode (IH). High edges-to- graphitic plane ratio in the support achieved due to the specific herringbone...

Hierarchical all carbon metal-free catalyst with controlled macroscopic shape based on the carbon nanotubes decorated carbon felt (CNT@CF) has been prepared. The catalyst was further treated under gaseous nitric acid to generate structural defects on its surface (o-CNT@o-CF). The as-synthesized catalyst was evaluated in the partial oxidation of H2S...

Carbon-based nanomaterials, particularly in the form of N-doped networks, are receiving the attention of the catalysis community as effective metal-free systems for a relatively wide range of industrially relevant transformations. Among them, they have drawn attention as highly valuable and durable catalysts for the selective hydrogen sulfide oxida...

Carbon-based nanomaterials, particularly in the form of N-doped networks, are receiving the attention of the catalysis community as effective metal-free systems for a relatively wide range of industrially relevant transformations. Among them, they have drawn attention as highly valuable and durable catalysts for the selective hydrogen sulfide oxida...

The Cover Feature shows an ideal scheme for the heat management in flow‐reactors that allows to re‐evaluate industrially attractive composites (and their large‐scale preparation methods) for catalytic application to a key process at the heart of the P2G chain: the methanation reaction. Highly Ni‐loaded γ‐Al2O3 composites with poor thermal conductiv...

In this work, we joined highly Ni‐loaded γ‐Al2O3 composites, straightforwardly prepared by impregnation methods, with an induction heating setup suited to control, almost in real‐time, any temperature swing at the catalyst sites (i. e., “hot spots” ignition) caused by an exothermic reaction at the heart of the power‐to‐gas (P2G) chain: CO2 methanat...

As far as environmental chemistry is concerned, N-doped nanocarbons have been employed as efficient, selective and robust metal-free systems for the selective oxidation of H2S to elemental sulfur in tail-gas treatment units. Modified Claus units that includes tail-gas treatments can reach up to 99.9% conversion of H2S into elemental sulfur; a techn...

This Perspective illustrates the electromagnetic induction heating technology for a rational heat control in catalytic heterogeneous processes. It mainly focuses on the remarkable advantages of this approach in terms of process intensification, energy efficiency, reactor setup simplification and safety issues coming from the use of radiofrequency h...

In this report, the post-Claus selective catalytic oxidation of H2S reaction in a continuous mode is demonstrated on N-doped 3D mesoporous carbon/carbon nanotube (N-C/CNT) monoliths at reaction temperature higher than the dew-point (> 180 oC) of elemental sulfur. The N-C/CNT monoliths display a hierarchical open porous framework (an interconnected...

Developing of both effective and stable noble metal nanoparticle (NPs) catalysts with easy catalyst-product recovery is still challenging in the liquid-phase catalytic processes. Here, we report on the synthesis of a hierarchical structured catalyst that consisted of oxygen functionalized graphite felt (OGF) support for liquid-phase processes. The...

Carbon dioxide (CO 2 ) hydrogenation to methane (CH 4 ) (Sabatier reaction) is a fundamental process that meets with several key challenges of our modern society. Besides representing a convenient way to the metal-mediated conversion of a natural and abundant “waste” into a fuel of added value, its combination with H 2 from renewable resources (REs...

Carbon dioxide (CO2) hydrogenation to methane (CH4) is a way of great significance from an energy-saving viewpoint that consists in the direct conversion of a natural and abundant waste into a fuel of added value. Its practical exploitation can significantly impact on the control of anthropogenic CO2 emissions into the earth's atmosphere and their...

The selective oxidation of H₂S to elemental sulfur was carried out on a NiS₂/SiCfoam catalyst under reaction temperatures between 40 and 80 °C using highly H₂S enriched effluents (from 0.5 to 1 vol.%). The amphiphilic properties of SiC foam provide an ideal support for the anchoring and growth of a NiS₂ active phase. The NiS₂/SiC composite was empl...

The recovery of oils and organic compounds is a key challenge in wastewater purification processes. Herein the authors describe a straightforward and easy‐to‐scale‐up strategy for the fabrication of lightweight and highly hydrophobic composites with superior mechanical strength, through the coating of commercial carbon felt (CF) with a thin mesopor...

In this study, we reported on the influence of gaseous HNO3 treatment on the formation of defects decorated with oxygenated functional groups on commercial graphite felts (GFs). The gaseous acid treatment also leads to a remarkable increase of the specific as well as effective surface area through the formation of a highly porous graphite structure...

New catalytic materials have been extensively developed since the last decades for application in several research fields including sensors, drug delivery, light-weight/high mechanical strength composites and catalysis. In this presentation, we will discuss about last developments on the use of bio-sourced precursors for the synthesis of a new clas...

Nanodiamonds (NDs) are recognized as a class of robust metal-free catalysts for the steam-free, direct dehydrogenation (DDH) of ethylbenzene (EB) to styrene (ST). In spite of that, some main drawbacks, such as their powdery form along with their tendency to form aggregates, limit their full exploitation at the industrial level. In this work, we des...

This review provides an overview of the use of foam-structured SiC as a porous support platform in some typical catalytic processes both for gas-phase and liquid-phase reactions, such as H2S selective oxidation, Friedel–Crafts benzoylation and Fischer–Tropsch synthesis, where traditional catalysts have shown their weaknesses. The macroscopic therma...

Nitrogen-doped carbon nanotubes (N-CNTs) with macroscopic shaping were synthesized by a coagulation route using alginate as a coagulating agent and the as-synthesized sample was used as metal-free catalysts in the partial oxidation of H2S into elemental sulfur. The N-CNT beads display a relatively high desulfurization activity along with a high sta...

This review provides an overview of the use of foam-structured SiC as a porous support platform in some typical catalytic processes both for gas-phase and liquid-phase reactions, such as H2S selective oxidation, Friedel–Crafts benzoylation and Fischer–Tropsch synthesis, where traditional catalysts have shown their weaknesses. The macroscopic therma...

New Materials for Catalytic Applications proposes the use of both new and existing materials for catalytic applications, such as zeolites, metal oxides, microporous and mesoporous materials, and monocrystals. In addition, metal-oxides are discussed from a new perspective, i.e. nano- and photocatalytic applications. The material presents these conce...

A challenging task of modern and sustainable catalysis is to re-think key-processes at the heart of renewable energy technology in light of metal-free catalytic architectures designed and fabricated from cheap and easily accessible building blocks. This contribution describes the synthesis of highly N-doped, carbon nanotube (CNT)-netting composites...

Hierarchical structure characterized by the decoration of few-layer graphene (FLG) surface with a dense network of carbon nanofibers (CNF) was synthesized by Chemical Vapor Deposition. This hierarchical composite was further used as host matrix for the dispersion of nanodiamonds (ND) to produce a metal-free catalyst for the direct dehydrogenation (...

The straightforward “dressing” of macroscopically shaped supports (i.e. β-SiC and α-Al2O3) with a mesoporous and highly nitrogen-doped carbon-phase starting from food-processing raw materials is described. The as-prepared composites serve as highly efficient and selective metal-free catalysts for promoting industrial key-processes at the heart of r...

A hierarchical metal-free catalyst consisting of nitrogen-doped carbon nanotubes decorated onto a silicon carbide (N-CNTs/SiC) macroscopic host structure was prepared. The influence of N-CNTs incorporation on the physical properties of the support was evaluated using different characterization techniques. The catalyst was tested as a metal-free cat...

Hierarchical metal-free catalyst based on the CVD synthesis of nitrogen-doped carbon nanotubes decorated silicon carbide (N-CNTs/SiC) macroscopic host structure has been prepared. The catalyst was evaluated in the partial oxidation of H2S by oxygen into elemental sulfur in a fixed-bed reactor. The catalytic results indicate that the N-CNTs/SiC cata...

We report on the N-decoration of multiwalled carbon nanotubes (MWCNTs) via chemical functionalization under mild reaction conditions. The introduction of tailored pyridinic functionalities as N-containing edge-type group mimics generates effective catalysts for the oxygen reduction reaction (ORR) in an alkaline environment. The adopted methodology...

Magnetic iron oxide nanoparticles (NPs) with narrow size distribution (8 ± 2 nm), well defined chemical composition and crystalline structure are synthesized and homogeneously dispersed onto the surface of few-layer graphene (FLG) via a solvothermal decomposition method. The iron oxide NPs are strongly anchored to the graphene surface and confer a...