液相合成甲醇催化剂稳定性的改进  

Improvement of stability of catalysts for liquid phase methanol synthesis

作　　者：喻仕瑞[1,2] 高志华[1] 栾春晖[1] 王晓东[1] 高珊珊[2] 黄伟[1] 

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]贵州大学化学与化工学院,贵州贵阳550025

出　　处：《天然气化工—C1化学与化工》2013年第4期15-18,33,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金(21176167);973计划(2011CB211709);教育部科学技术研究重点项目(212021);贵州省科学技术基金(黔科合J字[2012]2154号);教育部博士点基金优先发展领域课题(20111402130002);山西省自然科学基金(2012011046-1)

摘　　要：CO加氢合成甲醇是强放热反应,液相合成甲醇因溶剂导热系数大能迅速移除热量有利于稳定操作,但因催化剂快速失活而未能工业化,催化剂稳定性成为液相合成甲醇的关键。本研究用完全液相法制备催化剂,比较了CuZnAlSi及MnCuZnAlSi的催化性能,并分析了改进的原因。结果表明:完全液相法制备Mn改性CuZnAlSi催化剂液相合成甲醇有良好稳定性,Mn-CuZnAlSi能提高甲醇选择性和催化活性,Mn-CuZnAlSi(CZAS-0.08Mn)浆状催化剂在250℃,5.0MPa下反应144h未见失活迹象。Synthesis of methanol from CO hydrogenation is a highly exothermic reaction, and slurry phase reaction is advantageous to remove the heat and stabilize the operation since the solvent has a good coefficient of heat transfer. However, the slurry phase reaction is still not applied for methanol industrial production because of the rapid deactivation of slurry catalysts, and the stability of catalysts has become a key to this reaction. In this work, a complete liquid phase technology was applied to prepare the slurry catalyst. The catalytic performances of the CuZnA1Si and Mn-CuZnAISi catalysts were compared, and the causes resulting in the improvement were analyzed. The results showed that the Mn-CuZnA1Si prepared by complete liquid phase method had a good stability for slurry phase methanol synthesis, and could improve both the activity and the selectivity. For the Mn-CuZnA1Si catalyst CZAS-0.08Mn, no deactivation occurred for 144 hours under the reaction conditions of 250℃ and 5.0MPa.

关 键 词：稳定性 完全液相法 甲醇 液相合成 锰-铜锌铝硅催化剂 

分 类 号：O643[理学—物理化学] TQ223.121[理学—化学]