合成气制液化石油气复合催化剂的性能  

Hybrid Catalysts for Liquefied Petroleum Gas Synthesis from Syngas

作　　者：马现刚[1,2] 葛庆杰[1] 方传艳[1] 马俊国[1] 徐恒泳[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院研究生院,北京100049

出　　处：《催化学报》2010年第12期1501-1506,共6页

基　　金：中国科学院大连化学物理研究所百人计划(K090330801)

摘　　要：将甲醇合成催化剂与负载Pd的分子筛颗粒混合制得复合催化剂,在连续固定床反应器上考察了该催化剂对合成气一步法制液化石油气(LPG)的性能.采用N2吸附-脱附、NH3程序升温脱附和程序升温氧化对催化剂进行了表征.结果表明,分子筛孔径对LPG选择性影响显著,当采用孔径为0.74nm×0.74nm的Y型分子筛时LPG选择性最高.在300oC,2.1MPa和空速1500h-1条件下,含有Y型分子筛的复合催化剂上CO转化率达80.2%,LPG占烃类产物的73.8%.在一步法合成LPG反应中,催化剂表面积炭是导致CO转化率和LPG选择性下降的主要原因.Direct synthesis of liquefied petroleum gas （LPG） from syngas over hybrid catalysts consisting of methanol synthesis catalyst and Pd-modified zeolites such as Pd/SAPO- 11, Pd/ZSM-5, Pd/β, and Pd/Y was investigated in a fixed-bed reactor. Pore diameter of zeolites had great effect on LPG selectivity. The hybrid catalyst composed of methanol synthesis catalyst and Pd/Y demonstrated a good reactivity and more than 73% selectivity for LPG at 300℃, 2.1 MPa, and the space velocity of 1 500 h^-1. N2 adsorption-desorption, NH3 temperature-programmed desorption and temperature-programmed oxidation were carried out to study the properties of the catalysts before and after reaction. The results indicated that coke deposition was the main reason for the catalyst deactivation.

关 键 词：合成气 液化石油气 复合催化剂 Y型分子筛 积炭 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]