物理化学学报Issue(3)：545-551,7.DOI:10.3866/PKU.WHXB201501202
耐硫甲烷化中H2S浓度对MoO3/Al2O3和CoO-MoO3/Al2O3催化剂的影响
Effect of H2S Concentration on MoO3/Al2O3 and CoO-MoO3/Al2O3 Catalysts for Sulfur-Resistant Methanation
摘要
Abstract
The activities of 25%(mass fraction, w) MoO3/Al2O3 and 5%(w) CoO-25%MoO3/Al2O3 catalysts in a sulfur-resistant methanation process were examined as the concentration of H2S was varied from 0 to 12 mL∙L-1 (volume fractionφ=0.00%-1.20%). The results showed that the catalytic activity of 5%CoO-25%MoO3/Al2O3 catalyst increased steadily as the concentration of H2S increased. However, the catalytic performance of the 25%MoO3/Al2O3 catalyst was insensitive to the H2S concentration. Co was found to benefit the 25%MoO3/Al2O3 catalyst when H2S concentration was greater than 0.40%(φ). Below this threshold, addition of Co to the catalyst matrix inhibited the activity of the 25%MoO3/Al2O3 catalyst. N2-physisorption (BET) and X-ray diffraction (XRD) analyses were used to characterize the fresh and used catalysts. The results indicated that exposure to H2S at various concentrations did not significantly affect the physical structure of the catalysts, but it wil affect the active phase through metal sulfides. The results provide the appropriate range of H2S concentration to add Co as promoter for 25%MoO3/Al2O3 catalyst, which is likely to be useful for industrial catalyst selection.关键词
耐硫甲烷化/H2S浓度/MoO3/Al2O3催化剂/Co助剂/合成天然气Key words
Sulfur-resistant methanation/H2S concentration/MoO3/Al2O3 catalyst/Co promoter/Synthetic natural gas分类
化学化工引用本文复制引用
王保伟,刘思含,胡宗元,李振花,马新宾..耐硫甲烷化中H2S浓度对MoO3/Al2O3和CoO-MoO3/Al2O3催化剂的影响[J].物理化学学报,2015,(3):545-551,7.基金项目
The project was supported by the National High-Tech Research and Development Program of China (863)(2015AAJY1602).国家高技术研究发展计划(863)(2015AAJY1602)资助 （863）
