摘要
用浸渍法制备了一系列无机氧化物负载的金属铁催化剂 ,在 CO2 加氢甲烷化反应中考察了催化活性 .结果表明 ,载体对铁催化剂的活性影响显著 :其顺序为 Ti O2 >Zr O2 >海泡石 >Al2 O3>Si O2 .CO2 转化率及甲烷选择性均与金属负载量、空速和原料气配比有关 ;制备过程中的氨处理有利于催化剂活性的提高 ;第二组分 族及非 族金属的添加对催化活性具有较大影响 .
Fe catalysts supported on inorganic oxides have been prepared by impregnation method. Their catalytic activities for the methanation of carbon dioxide are investigated. The results indicate that the oxide supports, in order of influence on the activity of Fe catalyst are titania>zirconia>sepiolite>alumina>silica. Both the conversion of carbon dioxide and the selectivity of methane strongly depend on the GHSV and the composition of feedstock. The ammonia treatment of Fe catalysts before calcination favors the methanation reaction. The introductions of other Ⅷ group or non-Ⅷ group metals influence the catalytic activities effectively.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第7期536-539,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金 (2 0 0 72 0 0 5 )
广东省自然科学基金 (960 2 61)资助项目
