贫铀氧化物负载镍催化剂在非绝热反应器中的自热CO2甲烷化反应

IF 13.1 1区 化学 Q1 Energy
Lai Truong-Phuoc , Jean-Mario Nhut , Loïc Vidal , Cuong Duong-Viet , Sécou Sall , Corinne Petit , Christophe Sutter , Mehdi Arab , Alex Jourdan , Cuong Pham-Huu
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引用次数: 0

摘要

负载在贫铀氧化物上的未掺杂镍基催化剂允许在极低的反应温度下在大气压下进行CO2甲烷化过程,并由非接触式感应加热提供动力。通过调节反应条件,催化剂能够在无需任何外部能源供应的情况下,在非绝热反应器内操作的自热过程下进行CO2甲烷化反应。这种自热过程是可能的,这要归功于UOx的高表观密度,其允许将反应热限制在小的催化剂体积中,以便将反应的放热限制在催化剂内部并在平衡热输入热输出下操作反应。与使用绝热反应器操作的模式相比,这种自热操作模式允许显著降低过程的复杂性,在绝热反应器中需要完全绝缘以防止热量不平衡,从而尽可能减少与外部介质的热交换。催化剂表现出极高的稳定性,作为运行时间的函数,没有明显的失活。预计这种具有前所未有催化性能的新型催化剂将在多相催化领域开辟一个新的时代,在该领域,传统载体显示出其在恶劣反应条件下操作催化过程的局限性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Depleted uranium oxide supported nickel catalyst for autothermal CO2 methanation in non-adiabatic reactor under induction heating

Depleted uranium oxide supported nickel catalyst for autothermal CO2 methanation in non-adiabatic reactor under induction heating

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 operated inside a non-adiabatic reactor, without any external energy supply. Such autothermal process is possible thanks to the high apparent density of the UOx 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.

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来源期刊
Journal of Energy Chemistry
Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL
CiteScore
19.10
自引率
8.40%
发文量
3631
审稿时长
15 days
期刊介绍: The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy
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