K改性对Cu-Co低碳醇催化剂性能的影响  

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

作　　者：孔劼琛 刘媛 邱正璞 徐晓颖 张凡 高志贤[2] 孙琦 张玉龙 Kong Jiechen;Liu Yuan;Qiu Zhengpu;Xu Xiaoying;Zhang Fan;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79-83,共5页Industrial Catalysis

基　　金：国家重点研发计划(2018YFB0604700)资助项目

摘　　要：通过浸渍法制备不同K2CO3含量的K-CuCoAl催化剂,考察K含量对催化剂织构及低碳醇合成性能的影响。结果表明,K加入能中和催化剂表面的酸性;同时使催化剂对CO的线式吸附能力呈先升后降的趋势,相对应的产物中醇选择性也呈先升后降的趋势;K的负载会降低催化剂对CO的加氢反应活性。K含量对总醇收率影响呈火山型变化规律,最佳负载质量分数为0.9%。A series of K-CuCoAl catalysts with different K 2 CO 3 loading were prepared by impregnation method.The influences of K content on the catalysts structure,properties,and catalytic performance for high alcohols synthesis were studied.Results showed that the acidity of catalyst surface was decreased after K adding.Meanwhile the linear adsorption capacity for CO of catalyst firstly increased and then decreased,subsequently led to the corresponding change of alcohol selectivity.However,the catalytic activity of catalyst for CO hydrogenation was decreased after introducing K 2 CO 3.The influence of K content on the total yield of alcohol presented a“volcano plot”trend.The optimal addition amount of K 2 CO 3 was 0.9%.

关 键 词：催化化学 浸渍 K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]