东南大学学报（英文版）2017，Vol.33Issue(4)：448-456,9.DOI:10.3969/j.issn.1003-7985.2017.04.010
Ni/γ-Al2O3甲烷化催化剂提高生物质气化燃气低位热值的实验
Experiments on Ni/γ-Al2O3 catalyst for improving lower heating value of biomass gasification fuel gas via methanation
摘要
Abstract
Ni-based catalysts supported by γ-Al2O3 were prepared for improving the lower heating value (LHV) of biomass gasification fuel gas through methanation.Prior to the performance tests,the physico-chemical properties of the catalyst samples were characterized by N2 isothermal adsorption/desorption,X-ray diffraction (XRD) and a scanning electron microscope (SEM).Afterwards,a series of experiments were carried out to investigate the catalytic performance and the results show that catalysts with 15％ and 20％ Ni loadings have better methanation catalytic effect than those with 5％ and 10％ Ni loadings in terms of elevating the LHV of biomass gasification fuel gas.Moreover,controllable influential factors such as the reaction temperature,the H2/CO ratio and the water content occupy an important position in the methanation of biomass gasification fuel gas.15Ni/γ-Al2O3 and 20Ni/γ-Al2O3 catalysts have a higher CO conversion and CH4 selectivity at 350 ℃ and the LHV of biomass gasification fuel gas can be largely increased by 34.3 ％ at 350 ℃.Higher H2/CO ratio and a lower water content are more beneficial for improving the LHV of biomass gasification fuel gas when considering the combination of both CO conversion and CH4 selectivity.This is due to the fact that a higher H2/CO ratio and lower water content can increase the extent of the methanation reaction.关键词
镍基催化剂/甲烷化/生物质燃气/低位热值Key words
Ni-based catalyst/methanation/biomass gasification fuel gas/lower heating value分类
化学化工引用本文复制引用
董新新,金保昇,王妍艳,牛淼淼..Ni/γ-Al2O3甲烷化催化剂提高生物质气化燃气低位热值的实验[J].东南大学学报（英文版）,2017,33(4):448-456,9.基金项目
The International S&T Cooperation Program of China (No.2014DFE70150). （No.2014DFE70150）
