Mn改性Ni/K/MoS_2合成低碳醇催化剂反应性能研究  

PERFORMANCE OF Mn-MODIFIED Ni/K/MoS_2 CATALYSTS FOR HIGHER ALCOHOL SYNTHESIS

作　　者：齐会杰[1] 李德宝[1] 马玉刚[1] 李文怀[1] 孙予罕[1] 钟炳[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《燃料化学学报》2003年第2期119-123,共5页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划项目(G1999022404)

摘　　要：以不同的添加方式在Ni K MoS2催化剂中加入Mn助剂,考察其合成醇反应性能。结果表明,Mn Ni K MoS2催化剂具有较好的合成低碳混合醇反应性能。共沉淀法以醋酸锰为前驱体加入0 26%的Mn助剂后,C+2醇含量,醇时空产率及选择性均明显提高;分步沉淀法使Mn的加入量增加到0 66%,醇时空产率明显增加。以浸渍法按化学计量加入Mn助剂考察其含量对催化剂合成醇性能的影响,当Mn Mo(原子比)为1 5时,反应条件为315℃,9 5MPa,6000h-1,醇时空产率和醇选择性分别达到最高值0 338g mL·h和69 6%。300h的稳定性测试结果表明,共沉淀法改性的催化剂具有良好的稳定性。Mn/Ni/K/MoS2 catalysts prepared by different methods and their performances for higher alcohols synthesis from syngas were tested under different reaction conditions The C+2 alcohols content, the selectivity and spacetimeyield of alcohols obviously increased when the catalyst with Mn content of only 026% was prepared by coprecipitation using (NH4)2MoS4, Mn(AC)2·4H2O and Ni(AC)2·4H2O as the precursors As the content of Mn in Mn/Ni/K/MoS2 catalyst prepared by successive precipitation increased to 066%, the spacetimeyield was improved remarkably The effect of Mn content on catalytic performance was then investigated over Mn/Ni/K/MoS2 catalysts prepared by impregnation method The results showed that the selectivity and spacetimeyield of alcohols reached the maximum, ie 696% and 0338?g/mL·h at the reaction conditions of 315?℃, 95?MPa and 6?000?h-1 when the Mn/Mo (molar ratio) was 15 Furthermore, the stability test for 300?h over Mn/Ni/K/MoS2 catalyst prepared by coprecipitation showed that the catalyst had a good stability

关 键 词：C0 H2 低碳醇 Ni/K/MoS2 锰助剂 合成 催化剂 镍 钾 钼 一氧化碳 氢气 

分 类 号：O623.411[理学—有机化学] O643.36[理学—化学]