Regeneration Kinetics of Spent FCC Catalyst via Coke Gasification in a Micro Fluidized Bed
Regeneration Kinetics of Spent FCC Catalyst via Coke Gasification in a Micro Fluidized Bed
复制标题
DOI：
10.1016/j.proeng.2015.01.312
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Yuming Zhang;Guogang Sun;Shiqiu Gao;Guangwen Xu
中科院分区：
文献类型：
--
作者：
Yuming Zhang;Guogang Sun;Shiqiu Gao;Guangwen Xu
在微型流化床反应器中，采用焦炭气化法代替燃烧法对流化催化裂化（FCC）废催化剂进行再生，考察其反应特性和动力学参数。反应速率随碳转化率的增加先增加后缓慢下降。发现H2和CO超过70 vol. %在气化气体中。采用均相反应模型（HM）和收缩核反应模型（SCM）对催化剂再生动力学参数进行了计算，发现HM模型对数据的拟合相关性优于SCM模型。两种模型计算的焦炭在FCC催化剂上气化反应的活化能相近，均在150 kJ.mol-1左右。
In the present study, the spent fluid catalytic cracking (FCC) catalyst is regenerated via coke gasification instead of combustion in a micro fluidized bed reactor to investigate its reaction characteristics and kinetic parameters. The reaction rate first increased with carbon conversion ratio and then slowly decreased when reaching the peak. H2and CO was found to be over 70 vol.% in the gasification gas. Two reaction models, homogenous model (HM) and shrinking core model (SCM) were used to calculate the kinetic parameters of catalyst regeneration, finding that HM had better fitting relevance for the data than SCM. The activation energy from these two models was close to each other, that is, about 150 kJ.mol-1for the coke gasification over FCC catalyst.