含CO_2合成气低温合成甲醇的研究  

Study on low-temperature synthesis of methanol from syngas containing CO_2

作　　者：孙志国[1] 杨瑞芹[1] 李文泽[1] 范文玉[1] 

机构地区：[1]沈阳化工学院应用化学学院,辽宁沈阳110142

出　　处：《工业催化》2008年第11期48-52,共5页Industrial Catalysis

基　　金：留学归国人员科研启动基金[教外司留(2008)101号]

摘　　要：以含CO2的合成气为原料,Cu-Zn基催化剂,醇溶剂,低温、低压(443K、3.0MPa)下合成甲醇。考察了时间、溶剂和催化剂对反应的影响。结果表明,随着反应时间的增加,碳的总转化率、甲醇选择性及收率均逐渐增加;醇溶剂参与反应,但并不被消耗,起到助催化作用,且2-丁醇溶剂表现出较高的反应活性;ZnO、Y2O3、La2O3、MgO和Al2O3作为载体制得的Cu/MxOy催化剂,Cu/ZnO呈现出较高的反应活性;稀土元素La作为助剂,能提高Cu-Zn基催化剂的活性,当使用n(Cu)∶n(Zn+La)=1∶1,且n(Zn)∶n(La)=3∶2的Cu/ZnO/La2O3催化剂进行甲醇合成反应时,碳总转化率、甲醇的选择性和收率均高于Cu/ZnO催化剂。Methanol was synthesized over Cu-Zn-based catalysts at low-temperature and low-pressure （443 K,3.0 MPa） from syngas containing CO2 using alcohol solvent. The effects of reaction time, solvent and catalysts were investigated. The results showed that overall carbon conversion, selectivity to methanol and yield increased with reaction time. The alcohol solvent participated in the reaction as a co-catalyst without consumption, and 2-butanol solvent exhibited higher activity. Cu/ZnO catalyst exhibited the higher activity of all Cu/MxOy catalysts prepared using ZnO, MgO, Al2O3, La2O3 and Y2O3 as the carriers. Activity of Cu-Zn-based catalysts was enhanced by doping of rare-earth metals, with higher overall carbon conversion, selectivity to methanol and methanol yield over Cu/ZnO/La2O3 catalyst with Cu/ （ Zn ＋ La） molar ratio of 1 ： 1 and Zn/La molar ratio of 3 ： 2.

关 键 词：有机合成化学 含CO2合成气 甲醇合成催化剂 铜锌基催化剂 2-丁醇 稀土元素 

分 类 号：TQ214[化学工程—有机化工]