低碳化学与化工2023，Vol.48Issue(6)：1-9,9.DOI:10.12434/j.issn.2097-2547.20230141
CH4-CO2重整反应用Ni基合金催化剂研究进展
Research progress on Ni-based alloy catalysts in CH4-CO2 reforming reaction
摘要
Abstract
CH4-CO2 reforming reaction can convert two greenhouse gases,CH4 and CO2,into syngas with a theoretical n(H2)/n(CO)= 1,which is of great significance for the efficient utilization of natural gas resources and the realization of the two-carbon goal.Commonly used Ni-based catalysts for this process have good application potential due to their low cost and high activity.However,serious sintering and carbon deposits problems make them easy to be inactivated,and their stability cannot meet the industrial requirements.Adding another metal to Ni is an effective way to enhance the stability of Ni-based catalysts.In order to deepen the understanding of the mechanism of Ni-based alloy catalysts in the CH4-CO2 reaction and provide guidance for future research,the research progress of Ni-based alloy CH4-CO2 catalysts in recent years was reviewed.It is found that an appropriate amount of noble metals(Ru,Pt,Rh,etc.)or non-noble metals(Co,Fe,Cu,etc.)doping can effectively improve the sintering and carbon deposits resistance of Ni-based catalysts.On the one hand,noble metals themselves have excellent activity and stability,and on the other hand,they can also change the surface microscopic properties of Ni-based catalysts and play a synergistic role.Most of the non-noble metals themselves do not have significant catalytic activity,and mainly change the surface properties of Ni by forming alloys,thereby affecting the mechanism of reduction or reaction process.The mechanisms of improving the stability of Ni-based alloys are summarized as follows:inhibiting CH4 cracking by occupying the Ni step,adjusting the activation energy of CH4 and CO2 adsorption by changing the density of Ni metal atom electron clouds to promote the oxidation elimination of surface carbon,inhibiting sintering to improve the dispersity of active metals and inhibiting the nucleation of carbon deposits by changing the characteristics of surface atomic structure,etc.A deeper understanding of the surface microstructure characteristics and influencing factors of Ni-based alloys is an important research direction in the future.关键词
甲烷/二氧化碳/Ni基合金/催化剂/稳定性Key words
methane/carbon dioxide/Ni-based alloys/catalysts/stability分类
化学化工引用本文复制引用
侯人玮,柳圣华,冯效迁..CH4-CO2重整反应用Ni基合金催化剂研究进展[J].低碳化学与化工,2023,48(6):1-9,9.基金项目
国家自然科学基金(22202095) （22202095）
辽宁省自然科学基金博士启动项目(2022-BS-309) （2022-BS-309）
辽宁省教育厅科学研究经费项目(LJKZ0614). （LJKZ0614）
