复合催化剂上合成气一步法制备液化石油气的研究  

Direct synthesis of liquefied petroleum gas from syngas over hybrid catalyst

作　　者：马现刚[1] 葛庆杰[1] 徐恒泳[1] 

机构地区：[1]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023

出　　处：《燃料化学学报》2013年第8期1010-1014,共5页Journal of Fuel Chemistry and Technology

基　　金：国家科技支撑计划(2011BAD22B06)

摘　　要：合成气一步法制备液化石油气(LPG)可在甲醇合成催化剂和分子筛组成的复合催化剂上实现。本实验选用与Y分子筛孔径相近的SAPO-5分子筛(0.73 nm×0.73 nm)作为研究对象,在335℃、3.0 MPa、空速1 500 h-1、Cu-Zn-Al/Pd-SAPO-5质量比为1/2的条件下获得了73.9%的CO转化率和73.0%的LPG选择性,该结果进一步证实了较大孔径的分子筛有利于LPG的合成。此外,研究结果还表明,合成气一步法制备LPG过程中甲醇/二甲醚向烃类的转化遵循烃池机理。Direct synthesis of liquefied petroleum gas （LPG） from syngas could be realized over a hybrid catalyst consisting of methanol synthesis catalyst and zeolite. In this work, SAPO-5 was chosen consciously for LPG synthesis, because its pore size （0.73 nm×0.73 nm） is similar to that of Y zeolite. As expected, the corresponding hybrid catalyst of SAPO-5 exhibits high selectivity （73. 0% ） to LPG, which confirms the previous deduction that large pore size of zeolite was beneficial to LPG synthesis. /n addition, as one step process of syngas to LPG, the formation of hydrocarbons from methanol or dimethyl ether follows the hydrocarbon pool mechanism.

关 键 词：液化石油气 合成气 复合催化剂 SAPO-5 

分 类 号：TQ546[化学工程—煤化学工程]