Effect of CO Combustion Promoters on Combustion Air Partition in FCC under Nearly Complete Combustion  

催化裂化临近完全燃烧状况下CO助燃剂对主风划分的影响(英文)

作　　者：王锐 罗雄麟 许锋 

机构地区：[1]Research Institute of Automation, China University of Petroleum

出　　处：《Chinese Journal of Chemical Engineering》2014年第5期531-537,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21006127);the National Basic Research Program of China(2012CB720500)

摘　　要：With CO combustion promoters, the role of combustion air flow rate for concerns of economics and control is important. The combustion air is conceptually divided to three parts: the air consumed by coke burning,the air consumed by CO combustion and the air unreacted. A mathematical model of a fluid catalytic cracking(FCC)unit, which includes a quantitative correlation of CO heterogeneous combustion and the amount of CO combustion promoters, is introduced to investigate the effects of promoters on the three parts of combustion air. The results show that the air consumed by coke burning is almost linear to combustion air flow rate, while the air consumed by CO combustion promoters tends to saturate as combustion air flow rate increases, indicating that higher air flow rate can only be used as a manipulated variable to control the oxygen content for an economic concern.With CO combustion promoters, the role of combustion air flow rate for concerns of economics and control is important. The combustion air is conceptually divided to three parts：the air consumed by coke burning, the air consumed by CO combustion and the air unreacted. A mathematical model of a fluid catalytic cracking （FCC） unit, which includes a quantitative correlation of CO heterogeneous combustion and the amount of CO combustion promoters, is introduced to investigate the effects of promoters on the three parts of combustion air. The results show that the air consumed by coke burning is almost linear to combustion air flow rate, while the air consumed by CO combustion promoters tends to saturate as combustion air flow rate increases, indicating that higher air flow rate can only be used as a manipulated variable to control the oxygen content for an economic concern.

关 键 词：fluid catalytic cracking unit CO combustion promoters combustion air partition 

分 类 号：TQ203.2[化学工程—有机化工]