STUDY OF INDUCTION PERIOD OVER ADM CATALYST FOR HIGHER ALCOHOLS SYNTHESIS
IntroductionOil Supply, limited in its nature, is inadequate in the face of needs infinite in their desires. This has placed the replacement fuels on a growth path. Higher alcohols synthesis (HAS) from nature gas or coal via syngas (mixture of H2 and CO) is a promising alternative route for clean fuels and chemicals in view of both resources utilization and environmental protection 1. Especially, linear higher alcohols may be an attractive alternative of harmful MTBE 2. In 1980s, researchers in Dow and Union Carbide 3-4 discovered that alkali-doped MoS2 catalysts (ADM) could be used to produce alcohols from syngas. The use of such catalysts may save considerable costs of ultra-desulphurization of the syngas for its resistance of sulfur poisoning in the feed gas 5-6. In spite of the great commercial significance of these catalysts, the physical and chemical bases for the activity, selectivity, and stability are not fully understood. Especially, the research involved in induction period and the effect of pretreatment on ADM had rarely been reported. In the present study, ADM catalyst was prepared and the performances for HAS were investigated. It was found that there was a remarkably long induction period at the initial reaction stage combined with decreasing of the sulfur contents in the effluent gas. From the results of TPR-MS and XPS characterization, the induction period could be understood as the losing of the surface-weak-bond sulfur from the catalyst. Furthermore, the induction period time could be shortened after pretreated with reductant gas (H2, CO or syngas). The catalytic performance for HAS enhanced after pretreated with CO or syngas.
Haicheng Xiao Debao Li Wenhuai Li Yuhan Sun
State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences Tai State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences Tai
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
229-230
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）