非酸峰对NH3-程序升温吸附法表征酸性的影响  

Effect of non-acidic peak on acidity characterization by NH3-temperature programmed desorption

作　　者：张若霖 徐华 陈芬芬 陈菲 喻昊 ZHANG Ruo-lin;XU Hua;CHEN Fen-fen;CHEN Fei;YU Hao(Petrochemical Research Institute,PetroChina,Beijing 102206,China)

机构地区：[1]中国石油石油化工研究院

出　　处：《石化技术与应用》2019年第5期301-304,共4页Petrochemical Technology & Application

基　　金：中国石油天然气股份有限公司石油化工研究院资助项目(项目编号:16-yk-05-70)

摘　　要：采用NH3-程序升温脱附(NH3-TPD)表征方法,结合在线气体分析仪,考察了USY分子筛催化剂、合成氨催化剂、加氢催化剂等不同催化剂样品在不同条件下非酸峰对NH3-TDP法表征酸性的影响。结果表明:催化剂体系预处理后未分解的组分、结构的H 2O及NH3的分解均会在程序升温脱附过程中产生非酸峰,这对谱图酸峰的判断造成影响,最终影响酸总量的定量结果。Non-acidic signals in different catalysts(such as USY zeolites,ammonia synthesis catalyst and hydrogenation catalyst)under different conditions were investigated in acidity characterization by ammonia-temperature programmed desorption(NH 3-TPD)and on-line gas analyzer.The results showed that non-acidic peaks could originaTEfrom components that had not decomposed after pre-treatment,structure water and ammonia decompose,consequently affected the interpretation of the result on total acid.

关 键 词：NH 3-程序升温脱附法 催化剂 酸性表征 非酸峰 酸总量 

分 类 号：TQ426.95[化学工程]