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Minimizing carbon deposition in plasma-induced methane coupling with structured hydrogenation catalysts

Journal of Energy Chemistry 2021年第7期30卷 271-279页

作者： nuria garcía-moncada Toine Cents Gerard van Rooij Leon Lefferts Catalytic Processes and Materials(CPM) TNW FacultyUniversity of TwenteP.O.Box 2177500 AE EnschedeThe Netherlands Sasol Holding Netherlands B.V. 7544 GG EnschedeThe Netherlands Nonequilibrium Fuel Conversion DIFFER5612 AJ EindhovenThe Netherlands

The effect of temperature and hydrogen addition on undesired carbonaceous deposit formation during methane coupling was studied in DBD-plasma catalytic-wall reactors with Pd/Al2 O3, using electrical power to drive the *** with thin catalyst layers allowed comparison of the performance of empty reactors and catalytic wall reactors without significantly influencing the plasma *** product distribution varies strongly in the temperature window between 25 and 200℃Minimal formation of deposits is found at an optimal temperature around 75℃ in the catalytic-wall *** selectivity to deposits was c.a.10% with only 9 mg of catalyst loading instead of 45% in the blank reactor,while decreasing methane conversion only ***-feeding H2 to an empty reactor causes a similar decrease in selectivity to deposits,but in this case methane conversion also decreased *** of deposits formation in the catalytic-wall reactor at 75℃ is due to catalytic hydrogenation of mainly acetylene to *** the empty reactor,H2 co-feed decreases conversion but does not change the product *** catalytic-wall reactors can be regenerated with H2-plasma at room temperature,which produces more added-value hydrocarbons.

关键词： Dielectric barrier discharge(DBD)plasma-catalysis Structured reactor Methane coupling H_(2)co-feed Temperature optimization Carbon deposits

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Co-promoted Mo-carbide catalytic system for sustainable manufacturing of chemicals via co-processing of CO_(2) with ethane

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Green Carbon 2023年第1期1卷 94-103页

作者： Vera Bikbaeva Nikolay Nesterenko nuria garcía-moncada Valentin Valtchev Laboratoire Catalyse et Spectrochimie ENSICAENUniversitéde CaenCNRS6 Boulevard Maréchal Juin14050 CaenFrance Servicios Generales de Investigación XPSCentro de InvestigaciónTecnología e Innovación de la Universidad de Sevilla(CITIUS)Av.Reina Mercedes 4B41012SevillaSpain

The study reports progress in developing a molybdenum carbide-based catalyst for co-processing ethane and CO_(2).The cobalt promoting of molybdenum carbide improved the activity and stability of ethane transformation in the presence of CO_(2) substantially without any impact on ethylene *** Mo-Co supported catalyst also showed interesting performance in catalyzing ethane dry reforming and that application could be a perspective further use for this *** addition,the comprehensive analysis of mono-and bi-metallic catalysts revealed that Co-promoting prevented rapid Mo-carbide ***,tuning operation conditions allowed to control catalyst’s selectivity and maximize CO_(2) utilization or ethylene formation.

关键词： CO_(2)utilization Oxidative dehydrogenation CO_(2)negative ethylene production Cobalt-molybdenum synergy Embryonic zeolite

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