K改性NiMoS/ZnAl氧化物负载型催化剂合成气制低碳醇性能研究OACSTPCD

Improving the C2+alcohols yield is highly desirable for the direct synthesis of higher alcohols from syngas.In this work,a series of highly dispersed K-modified NiMoS catalysts with different K contents on ZnAl-mixed oxide support were prepared by the combination of co-precipitation and impregnation method.And their performance in higher alcohols synthesis(HAS)from syngas was investigated.The results show that the introduction of K can modulate the stacking degree of MoS2 slabs,and improve the interaction between NiSx and NiMoS phases.The as-prepared catalyst is conducive to promote the insertion of CHx and non-dissociative CO in HAS,and effectively suppress the generation of hydrocarbons and CO2.The 0.6KNiMoS/ZnAl catalyst exhibits the most double-layer MoS2 slabs(33.7％)and highly synergetic effects between NiSx and NiMoS to achieve the total alcohols selectivity(69.8％)and space-time yield(78.6 mg/(g·h))of C2+alcohols.