Abstract：The effects of temperature and methanol partial pressure on the products of methanol to propylene over HZSM-5 catalyst which is used in industrial application were investigated in a continuous flow fixed-bed micro-reactor. The results showed that, when the temperature (>450 ℃) increased, methanol conversion can reached above 99%, simultaneously ethylene and propylene selectivity and light alkanes both increased, and heavy products selectivity declined. As the methanol partial pressure decreased, methanol conversion dropped, and mass ratio of propylene to ethylene (P/E ratio) increased. Propylene selectivity reached the highest when the methanol partial pressure was 33 kPa. The catalyst was deactived rapidly as the methanol partial pressure is lower than 11 kPa. Effects of temperature and methanol partial pressure on methanol conversion, propylene selectivity, P/E ratio and light olefins were systematically investigated as well as proper process conditions were optimized as reaction temperature of 470 ℃ and methanol partial pressure of 33 kPa.
Zhang Kun,Jiang Yongjun,Wang Lin et al. Invstigation of Process Conditions on the Conversion of Methanol to Propylene over HZSM-5[J]. 化学反应工程与工艺, 2014, 30(5): 440-445.
