高温环境下催化裂化催化剂磨损状况的研究  

Study on Attrition Behavior of Fluid Catalytic Cracking Catalysts under High Temperature

作　　者：马雅松 刘梦溪[1] MaYasong;Liu Mengxi(State Key Laboratory of Heavy Oil, China University of Petroleum(Beijing), Beijing 102249, China)

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《化学反应工程与工艺》2016年第1期33-38,共6页Chemical Reaction Engineering and Technology

基　　金：国家重大基础研究发展计划(973计划)(2012CB215000)

摘　　要：为研究流化催化裂化(FCC)催化剂在高温环境下的磨损行为,在一套固定流化床装置中考察了FCC平衡剂CGP-I在500℃和600℃高温环境下磨损率的时变关系和过孔气速对磨损率的影响,分别从颗粒形貌、磨损动力学等方面对催化剂的磨损机制进行了研究。结果表明:随着磨损时间的延长,磨损速率逐渐下降;随着磨损温度和孔气速的增加,磨损率增大。通过分析结果并与Gwyn磨损动力学方程比较建立了宏观磨损平衡方程,整个磨损过程可近似看作一级不可逆过程,该催化剂磨损率随磨损时间和孔气速的升高呈指数关系增加,高温环境下催化剂的磨损行为主要受表层磨损机制支配。To investigate the behaviors of fluid catalytic cracking (FCC) catalyst under high temperature, theimpact of time and jet velocity on the attrition rate of FCC catalyst (CGP-I) in a fixed fluidized bed werestudied at 500 ℃ and 600 ℃. The attrition mechanism of catalyst was also investigated based on particlemorphology and attrition dynamics. The results showed that attrition speed was decreased with the increaseof attrition time; attrition rate was increased with the increase of temperature and jet velocity. Based onexperiment results and Gwyn’s model, a macro-dynamics balance equation was established and anexponentially increasing attrition rate with attrition time and jet velocity was observed. The attrition processcan be considered as a first-order irreversible process and the catalyst attrition behavior is influenced byabrasion mechanism mostly under high temperature.

关 键 词：催化裂化催化剂磨损 高温 磨损动力学方程 

分 类 号：TE624[石油与天然气工程—油气加工工程]