Ga改性对Cu-Co低碳醇催化剂性能的影响  

Influence of Ga modification on Cu-Co catalytic performance for higher alcohol synthesis from syngas

作　　者：孔劼琛 刘媛 邱正璞 张凡 徐晓颖 高志贤[2] 孙琦 张玉龙 Kong Jiechen;Liu Yuan;Qiu Zhengpu;Zhang Fan;Xu Xiaoying;Gao Zhixian;Sun Qi;Zhang Yulong(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China)

机构地区：[1]北京低碳清洁能源研究所,北京102211 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《工业催化》2019年第8期74-78,共5页Industrial Catalysis

基　　金：国家重点研发计划(2018YFB0604700)资助项目

摘　　要：采用共沉淀法制备CuCoGaAl催化剂,考察Ga含量对催化剂织构及低碳醇合成性能的影响。结果表明,加入Ga可提高催化剂的比表面积,改变催化剂的表面性质。Ga改性促进CO的线式吸附能力,同时降低CO的桥式吸附能力,从而提高产物醇选择性,但过量Ga会大幅降低CO加氢反应活性。Ga含量对总醇收率的影响呈火山型变化规律,最佳Ga与Co物质的量比为0.3。CuCoGaAl catalysts were prepared by co-precipitation method.The influence of Ga content on catalysts textural properties and catalytic performance for CO hydrogenation were studied.Results showed Ga could increase catalyst surface area and change catalyst surface property.Ga modification promoted linear adsorption capacity and reduced bridge adsorption capacity for CO.These subsequently improved the selectivity of alcohol products.However,an excess Ga content decreased catalyst activity dramatically.The influence of Ga content on the total yield of alcohol presented a“volcano plot”trend.The optimal molar ratio of Ga to Co was 0.3.

关 键 词：催化化学 共沉淀 Ga含量 CuCo催化剂 低碳醇合成 

分 类 号：O643.36[理学—物理化学] TQ223[理学—化学]