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Depleted uranium oxide supported nickel catalyst for autothermal CO_(2)methanation in non-adiabatic reactor under induction heating

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Journal of Energy Chemistry 2023年第10期85卷 310-323,I0010页

作者： Lai Truong-Phuoc Jean-Mario Nhut Loïc Vidal Cuong Duong-Viet sécou sall Corinne Petit Christophe sutter Mehdi Arab Alex Jourdan Cuong Pham-Huu Institute of Chemistry and Processes for Energy Environment and Health(ICPEES)ECPMUMR 7515 CNRS-University of Strasbourg25 rue Becquerel67087 Strasbourg Cedex 02France BlackLeaf sAs 210 rue Geiler de Kaysersberg67400 IllkirchFrance Institute of Materials science of Mulhouse IS2MUMR 7361Universitéde Haute-AlsaceCNRS15rue Jean Starcky-BP 248868057 MulhouseFrance ORANO Tricastin Direction de La Recherche&DéveloppementSite du TRICASTIN BP 1626701 Pierrelatte CedexFrance

Undoped nickel-based catalysts supported on depleted uranium oxide allow one to carry out CO_(2)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 CO_(2)methanation reaction under autothermal process operated inside a non-adiabatic reactor,without any external energy supply.such autothermal process is possible thanks to the high apparent density of the UO_x which allows one to confine the reaction heat in a small catalyst volume in order to confine the exothermicity of the reaction inside the catalyst and to operate the reaction at equilibrium heat in-heat out.such autothermal operation mode allows one to significantly reduce the complexity of the process compared to that operated using adiabatic reactor,where complete insulation is required to prevent heat disequilibrium,in order to reduce as much as possible,the heat exchange with the external medium.The catalyst displays an extremely high stability as a function of time on stream as no apparent deactivation.It is expected that such new catalyst with unprecedented catalytic performance could open new era in the field of heterogeneous catalysis where traditional supports show their limitations to operate catalytic processes under severe reaction conditions.

关键词： CO_(2)methanation Auto-methanation Induction heating Depleted uranium oxide Electrification process Operando DRIFTs

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Forward Looking Analysis Approach to Assess Copper Acetate Thermal Decomposition Reaction Mechanism

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American Journal of Analytical Chemistry 2019年第5期10卷 153-170页

作者： Itab Youssef sécou sall Thierry Dintzer sana Labidi Corinne Petit Institut de Chimie et Procédés pour l’Energie l’Environnement et la Santé Université de Strasbourg UMR7515 CNRS 25 rue Becquerel Strasbourg France

Thermal decomposition course of copper acetate monohydrate was monitored by combining diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) coupled with μ gas chromatography-mass spectrometry (μGC-Ms) with other analytical techniques (thermogravimetry analysis and in situ X-ray diffraction). Non-isothermal kinetic was examined in air and Ar. A complete analysis of the evolution of infrared spectra matched with crystalline phase transition data during the course of reaction allows access to significant and accurate information about molecular dynamics. While thermogravimetry gives broad conclusion about two steps reaction (dehydration and decarboxylation), in line approach (in situ X-ray and in situ DRIFT coupled to μGC-Ms) is proposed as an example of a new robust and forward-looking analysis. While decomposition mechanism of copper acetate monohydrate is still not well elucidated yet previously, the present in-line characterization results lead to accurate data making the corresponding mechanism explicit.

关键词： In-Operando spectroscopy and Chromatography Thermal Decomposition Reaction Mechanism Copper Acetate Cross-Linked Characterization Data

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