预热液体石蜡对CuZnAl催化剂合成低碳醇的影响  

Effect of preheating liquid paraffin on synthesis of higher alcohols by CuZnAl Catalyst

作　　者：董伟兵[1] 郝树宏[2] 高志华[1] DONG Wei-bin HAO Shu-hong GAO Zhi-hua(Key Laboratory of Coal Science and Technology of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, 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 [2]国网山西电力科学研究院,山西太原030001

出　　处：《天然气化工—C1化学与化工》2017年第5期27-33,共7页Natural Gas Chemical Industry

基　　金：国家自然科学基金(201336006);山西省自然科学基金(201601D011021)

摘　　要：在完全液相法中,采用预热的液体石蜡为热处理和反应介质,以不同的热处理温度制备了CuZnAl催化剂。利用X射线衍射、H_2程序升温还原、NH_3程序升温脱附、氮吸附和X射线光电子能谱对催化剂进行了表征。结果表明,液体石蜡进行加热预处理可以增加催化剂中Cu晶粒度和孔径,改变Cu^+的存在形态,提高表面Cu/Zn比例,使催化剂具有适宜的弱酸量,从而促进了C_(2+)OH的生成。对液体石蜡预热处理后,在250℃和280℃进行热处理的催化剂C_(2+)OH/ROH分别达到了14.75%和14.12%,且其具有良好的稳定性,反应120h没有发现失活现象。The CuZnAl catalyst prepared by complete liquid-phase method was heat-treated under different temperature with paraffin which was pretreated in advance as heat-treatment and reaction medium.All catalysts were characterized by XRD,H2-TPR NH3-TPD,N2 adsorption and XPS.The results showed that the pretreatment of liquid paraffin could increase the grain size of Cu and pore size of the catalyst,change the existing form of Cu~＋,improve the Cu/Zn ratio on the surface,and make the catalyst have suitable weak acid content,which result in promoting the formation of C2＋ OH.Under the premise of pretreated liquid paraffin,the catalysts heat-treated under 250℃ and 280℃ had a higher selectivity of C2＋ OH with the C2＋ OH/ROH carbon atom ratios of reaching 14.75% and 14.12%,respectively,and the stability was still well behaved at 120 h.

关 键 词：完全液相法 CuZnAl催化剂 预热液体石蜡 热处理温度 低碳醇合成 

分 类 号：TQ223.1[化学工程—有机化工] TQ426