超临界条件下液相甲醇合成过程研究  

Liquid-Phase Methanol Synthesis Process at Supercritical State

作　　者：李涛[1] 张淑华[1] 房鼎业[1] 朱炳辰[1] 

机构地区：[1]华东理工大学化学工程系,上海200237

出　　处：《华东理工大学学报（自然科学版）》2005年第1期31-34,共4页Journal of East China University of Science and Technology

摘　　要：在压力6.0～7.0MPa,温度235～260°C,气体质量空速450～1400L/(kg·h)的实验条件下,以液体石蜡为惰性液相热载体,采用所筛选的正己烷作为超临界介质,于加压机械搅拌反应釜中,对催化剂C302-2进行了介质处于超临界状态的三相浆态床液相甲醇合成过程研究。结果表明:在低空速下,CO、CO2和H2的转化率以及甲醇出口摩尔分率均高于相应实验条件下气-固两相反应的平衡转化率及甲醇出口平衡摩尔分率,即超临界介质正己烷的引入起到反应-分离耦合作用,转移了液相甲醇合成过程可逆放热反应热力学平衡对转化率的限制,提高了合成气单程转化率及甲醇出口摩尔分率。A process of methanol synthesis on a new type Cu-based catalyst C302-2, which has high activity at low temperature and low pressure, is proceeded in a mechanically agitated slurry reactor with paraffin oil as the inert liquid medium and n-hexane selected as the supercritical medium under the reaction conditions of the temperature 235-260°C, the pressure 6.0-7.0 MPa and the mass space velocity 450-1400 L/(kg·h). The results show the conversion of CO, CO2 and H2 as well as outlet methanol mole fraction are higher than chemical equilibrium values of gas-solid reaction under the corresponding experimental condition. The process of liquid-phase methanol synthesis with n-hexane at supercritical state can move the limitation of chemical reaction equilibrium of the reversible exothermic methanol synthesis reaction by introducing supercritical medium which plays the role of reaction-separation coupling process on liquid-phase methanol synthesis.

关 键 词：超临界态 正己烷 液相甲醇合成过程 CO转化率 

分 类 号：TQ032.4[化学工程]