The Effect of Non-Framework Aluminum on the Stability and Activity of REY Zeolite  

作　　者：Chen Beiyan Shen Ningyuan He Mingyuan Tian Huiping Da Zhijian 

机构地区：[1]Research Institute of Petroleum Processing, Beijing 100083

出　　处：《China Petroleum Processing & Petrochemical Technology》2005年第2期47-51,共5页中国炼油与石油化工（英文版）

摘　　要：The present study is focused on the influence of a routine step, washing, following the preparation of calcined rare earth exchanged Y zeolite, on its hydrothermal stability. The hydrothermal stability of REY products, which were washed by different reagents, was observed and characterized by XRD, ICP, NMR, etc. The results reveal that the amount and the chemical type of the acidic media used for washing can significantly influence the content of remaining non-framework aluminum (NFA) and consequently further affect the hydrothermal stability of the washed REY products. The content of remaining non-framework aluminum can be well correlated with the crystallinity of REY products.The present study is focused on the influence of a routine step, washing, following the preparation of calcined rare earth exchanged Y zeolite, on its hydrothermal stability. The hydrothermal stability of REY products, which were washed by different reagents, was observed and characterized by XRD, ICP, NMR, etc. The results reveal that the amount and the chemical type of the acidic media used for washing can significantly influence the content of remaining non-framework aluminum （NFA） and consequently further affect the hydrothermal stability of the washed REY products. The content of remaining non-framework aluminum can be well correlated with the crystallinity of REY products.

关 键 词：rear earth Y zeolite hydrothermal stability non-framework aluminum 

分 类 号：O643.36[理学—物理化学]