燃料化学学报2018，Vol.46Issue(4)：489-499,11.
基于改性Ni/γ-Al2O3催化剂的电催化甲烷水蒸气重整的研究
Research on electro-catalytic steam reforming of methane with modified Ni/γ-Al2O3catalysts
摘要
Abstract
A novel electro-catalytic technique for catalytic methane steam reforming was developed. Based on the conventional industrial Ni-based catalyst, aseries of catalysts, including Ni/γ-Al2O3, Ni-MgO/γ-Al2O3and Ni-CaO/γ-Al2O3,were prepared using incipient wetness impregnation method with Ni as the active component, γ-Al2O3as the carrier,and MgO or CaO as the promoter. Experiments were performed to investigate the effects of electric current intensity, reforming temperature, and molar ratio of water vapor to methane (water/carbon ratio,S/C) on CH4conversion, H2yield, CO selectivity and catalyst stability. The results indicated that the electro-catalytic technique had good adaptability,and the introduction of electric current could improve the CH4 conversion and increase the H2yield. Such effects were more intensive at lower reforming temperatures. Among the three catalysts,Ni-CaO/γ-Al2O3catalyst exhibited the best catalytic efficiency,with the CH4conversion over 95% under conditions of 4.5 A,S/C of 3, and 700℃. Stability tests of the catalysts showed that the electric current could improve the stability of catalysts and delay the deactivation caused by coke deposition. The characterization results proved that the presence of electric current enhanced the reduction degree of NiO in the catalyst and inhibited NiCxconversion to graphite carbon, resulting the delay of catalyst deactivation caused by carbon deposition over reactive sites.关键词
电催化水蒸气重整/甲烷/Ni基催化剂/抗积炭Key words
electrochemical catalytic steam reforming/methane/Ni-based catalyst/carbon-resistance分类
化学化工引用本文复制引用
侯悦,张荣俊,陆强,杨少霞,李明丰..基于改性Ni/γ-Al2O3催化剂的电催化甲烷水蒸气重整的研究[J].燃料化学学报,2018,46(4):489-499,11.基金项目
The project was supported by Fundamental Research Funds for the Central Universities(2016YQ05,2015ZZD02),Beijing Nova Program(Z171100001117064)and State Key Laboratory of Catalytic Materials and Reaction Engineering(RIPP,SINOPEC).中央高校基本科研业务费(2016YQ05,2015ZZD02),北京市科技新星(Z171100001117064)和石油化工催化材料与反应工程国家重点实验室(中国石油化工股份有限公司石油化工科学研究院)开放基金项目资助 （2016YQ05,2015ZZD02）
