乙醇胺对非贵金属Cu基催化剂上合成气制乙醇的影响  

Effect of ethanolamine on ethanol synthesis from syngas over non-noble metal Cu-based catalysts

作　　者：贾磊[1] 刘勇军[1] 王晓钟[1] 崔燕[1] 黄伟[1] JIA Lei, LIU Yong-jun, WANG Xiao-zhong, CUI Yan, HUANG Wei(Key Laboratory of Coal Science and Technology of Education Ministry and Shanxi Province, Taiyuan University of Technology Taiyuan 030024, China)

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024

出　　处：《天然气化工—C1化学与化工》2018年第5期30-36,共7页Natural Gas Chemical Industry

基　　金：国家自然科学基金(21306125);国家自然科学基金重点项目(21336006)

摘　　要：采用完全液相法在非贵金属Cu基催化剂制备过程中以MEA为络合剂,考察不同MEA含量对催化剂结构及合成乙醇性能的影响。借助XRD、H_2-TPR、N_2吸脱附测试、NH3-TPR、TEM和EDX等手段进行表征,并采用浆态床反应器对催化剂的CO加氢性能进行评价。结果表明:较少的MEA有助于提高催化剂比表面积和ZnO的分散度,而较多MEA会破坏催化剂结构,降低表面弱酸量,同时加剧Cu颗粒的聚集,致使催化活性下降,且较少的弱酸量可能更有助于乙醇的合成。活性数据结果表明:添加MEA后C_(2+)OH在总醇选择性可达到50%以上,提高MEA含量可进一步提高乙醇选择性,当n(Cu):n(MEA)=2:0.5时,CO转化率高达39.57%,乙醇在醇分布中可达24.78%。Ethanolamine（MEA） was used as complexing agent to prepare non-noble metal Cu-based catalysts by the complete liquid phase method, and the effect of MEA dosage on the structure of catalysts and their catalytic properties in synthesis of ethanol was investigated. The catalysts were characterized by XRD, H2-TPR, N2 adsorption and desorption, NH3-TPR, TEM and EDX, and the catalytic performances of the catalysts in CO hydrogenation were evaluated in a slurry reactor. The results showed that less MEA could increase specific surface area and ZnO dispersion, while more MEA would destory the catalyst structure, reduce the amount of weak acid on the surface, and aggravate the aggregation of Cu particles, resulting in the decrease of catalytic activity. Moreover, less amount of weak acid may be more helpful for the synthesis of ethanol. The results of the activity data showed that the selectivity of C2 ＋OH in the alcohol product distribution could reach more than 50% by mass after adding MEA, and the selectivity of ethanol could be further increased by increasing MEA dosage. When n（Cu）：n（MEA） was of 2：0.5, the conversion of CO was up to 39.57% and the selectivity of ethanol reached 24.78% by mass in the alcohol distribution.

关 键 词：Cu基催化剂 完全液相法 乙醇 乙醇胺 合成气 

分 类 号：TQ223.1[化学工程—有机化工] TQ426