摘要
自从ICI低压、低温甲醇合成过程取代高压过程以来,人们对该过程所使用的Cu/ZnO/Al_2O_3或Cu/ZnO/Cr_2O_3催化剂有极大的兴趣。Herman、Klier等人已证明这种低压、低温下的活性应归属于Cu-ZnO间的相互作用,在相同的条件下,单纯的铜或氧化锌的活性几乎可以忽略不计,而氧化铝或氧化铬主要起结构助剂的作用。由此可见,控制适宜的Cu-ZnO间的相互作用是提高甲醇合成活性的关键,因此,如何才能产生这种适宜的相互作用就成了人们极为重视的研究课题。到目前为止,人们普遍采用沉淀法制备铜基甲醇合成催化剂。
In this paper,a series of Cu/ZnO and Cu/ZnO/Al_2O_3 catalysts for methanol synthesis were prepared by aerosol high temperature decomposition(AHTD)method.It was found that a volcano-shape correlation exised between the catalytic activities and the content of copper in Cu/ZnO catalysts,and the catalyst with Cu/Zn=12(atomic ratio)showed the bess activities.When there was small quantity of A1_2O_3 in Cu/ZnO catalysts,the activities were raised.Small amount of CO_2 in feed gas(CO/H_2)enhanced activities,and there was an optimum quantity of CO_2 at which the activity was maximum.For feed gas with H_2/CO/CO_2=67/29/4 the catalytic activity of catalyst(cat-8)obtained 87% of activity of the industrial Cu/Zn/Al catalyst prepared by precipitation method.The selectivity of methanol was very high.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1991年第2期180-184,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
关键词
甲醇
铜基
雾化高温分解
催化剂
aerosol high temperature decomposition
copper
methanol
