摘要
通过Ni,Mn对ADM催化剂进行改性,考察了其低碳醇的合成性能。结果表明,在较温和的条件(T=573 K,p=10.0 MPa,GHSV=5 500 h-1)下,Ni/Mn/ADM催化剂具有很高的合成醇活性和选择性,总醇的选择性达到76.22％。对助剂Ni,Mn的研究表明,Ni可有效提高催化剂的活性,Mn起到分散Ni组元的作用,有利于Ni组元发挥CO插入功能形成C2+OH,提高C2+OH的选择性。经初步测试催化剂具有较好的稳定性。尾气中COS为催化剂中硫的主要流失形式。
<abstract>M catalyst modified by Ni and Mn was prepared and synthesis for higher alcohols from syngas on this catalyst was investigated. Catalytic activity and C2+ OH selectivity sharply increased as Ni was added as promoter comparing with that of unmodified ADM catalyst. When ADM catalyst was co-promoted by Mn and Ni, alcohols selectivity of 76.22 % was obtained under the condition of T = 573 K, p= 10.0 MPa and GHSV = 5 500 h-1. The liquid products were mainly linear alcohols. The content of hydrocarbon and CO2 could be controlled to a lower level. Research showed that the dispersion of Ni on the catalyst was improved with the addition of Mn,and consequently, the activity and C2+ OH selectivity could be promoted. Catalyst showed good stability during the reaction. S in catalyst was lost primarily in the form of COS into tail gas.
出处
《石油化工》
CAS
CSCD
北大核心
2004年第7期603-607,共5页
Petrochemical Technology
