关键词: 乙醇, 低碳烯烃, 丙烯, Fe2O3/HZSM-5, 非石油路线化学品

Abstract: The catalytic conversion of ethanol to light olefins over Fe2O3/HZSM-5 catalyst prepared with impregnation method was investigated. The selectivity of olefins was tested against the ratio of silica to alumina and amount of iron oxide in catalyst, reaction temperature and pretreatment method for the catalyst in the temperature range of 400~500℃. It was demonstrated that propylene and butylenes were in good yield at the ratio of silica to alumina of 140, while iron impregnation onto HZSM-5 obviously increased the yields of these light olefins. The highest propylene yield of about 25% was realized when iron oxide loading was 2.9%. Elevating reaction temperature increased the selectivity to propylene at the initial reaction stage but shortened the activity lifetime of catalyst. Catalyst reduction in advance with H2 further promoted the production of propylene and ethylene.

Key words: ethanol, light olefin, propylene, Fe2O3/HZSM-5, non-oil route chemicals