摘要
利用XRD、TPR和EXAFS等手段考察了焙烧温度对Cu/MnO2/ZrO2催化剂性能影响。结果表明,随着焙烧温度增加,铜的配位环境发生变化,铜和锰之间相互作用增强,有效地防止铜组分在还原及反应过程中聚集长大,从而使催化剂活性显著增加。当催化剂经过高温焙烧,催化剂活性由于ZrO2结晶和铜的聚集而降低。
The addition of F-T elements, (such as Fe, Co, Ni), to Cu-Mn/ZrO 2 methanol catalysts shifted product distribution from methanol to higher alcohols Due to the obvious difference of these promoters, different selectivity of products were observed The sequence for the ability to promote carbon chain growth by CO hydrogenation was Co>Fe>Ni Co was not a satisfactory promoter for the modification due to the production of methane, although Co exhibited the strongest ability for promoting the chain growth; Fe also showed a higher selectivity for C + 2 alcohols, but with a obvious formation of CO 2; A reasonable addition of Ni brought a desirable product distribution, while the formation of methane could be controlled at a reasonable level
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1999年第S1期103-107,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金!资助项目 (基金号 :2 98730 64 )
