甲烷气相均相选择氧化合成甲醇  

Studies on Gas-Phase Homogeneous Selective Oxidation of Methane to Methanol

作　　者：张昕[1] 贺德华[1] 张启俭[1] 朱起明[1] 

机构地区：[1]清华大学化学系一碳化学与化工国家重点实验室,北京100084

出　　处：《石油化工》2003年第3期195-199,共5页Petrochemical Technology

基　　金：国家重点基础研究发展规划项目(G199902240-06)。

摘　　要：在特殊设计的不同尺寸的微型反应器和模试反应器中考察了反应温度、气体流速、压力、CH4/O2体积比、反应器恒温段长度以及运行时间等因素对CH4气相均相选择氧化合成CH3OH的影响。结果表明:430～470℃、较高的反应压力、较高的V(CH4)/V(O2),较大的反应气体流量的条件下,甲烷转化率为10%～13%,甲醇选择性为55%～65%,收率为7%～8%。反应尾气中还含有相当量的CO和H2,CO2选择性可以被控制在较低水平(≤5%)。提出了以管道天然气为原料一次通过直接氧化法合成CH3OH的新构想。Effect of reaction conditions such as temperature,flow rate,reaction pressure,CH 4/O 2 ratio,the length of reactor constant temperature zone,reaction time and size of reactor on gas-phase homogeneous oxidation of methane to methanol were investigated in specially designed reactors (micro-reactor and scale-up- reactor). Relatively high yield of methanol (7%～8%,at 55%～65% methanol selectivity) was obtained under the reaction conditions:in a wide temperature range (430～470 ℃),at high flow rate and at quite high CH 4/O 2 ratio.Those results approached the best results reported by Gesser et al .The reaction conditions and the size of reactors affected the methane conversion and methanol selectivity.Based on the attractive results,a novel 'Single Pass' Concept was proposed for producing methanol from pipeline natural gas.

关 键 词：甲烷 合成 甲醇 选择氧化 气相均相反应 一次通过法 

分 类 号：TQ223.121[化学工程—有机化工]