摘要
采用微型固定床反应器和气相色谱联合装置,研究了大颗粒FCC汽油芳构化催化剂的烧碳再生动力学和再生产物中CO2与CO的摩尔比。结果表明,大颗粒FCC汽油芳构化催化剂的烧碳反应速率与碳含量和氧分压的关系符合一级反应规律;但由于受内扩散的影响,其烧碳反应速率仅为本征烧碳反应速率的60%左右。在600℃～720℃再生产物中CO2/CO摩尔比随再生温度的增加而减小,720℃以后,该比值显著增大;随着氧分压的增加,CO2/CO摩尔比直线增加。
The regeneration of large particle catalyst in FCC naphtha aromatization was studied in a fixed bed microreactor. CO2/CO mol ratio in product gas during the regeneration was analyzed and apparent kinetic equation for coke combustion was derived. The results showed that the coke-burning rate is in first order with respect to both carbon content and oxygen partial pressure. Because of the internal diffusion, the coke-burning rate for large particle catalyst is only about 60% of that for the small one. CO2/CO mol ratio decreases with the increase of regeneration temperature from 600°C to 720°C; it increases greatly with the temperature when the regeneration temperature exceeds 720°C. The CO2/CO mol ratio increases linearly with the oxygen partial pressure.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2007年第6期673-677,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金重大项目(20490202)
国家杰出青年基金(20725620)
教育部新世纪优秀人才支持计划(NCET-04-0107)
作者简介
常剑(1973-), 男, 河南洛阳人, 博士研究生, 从事重质油加工及其过程数值模拟的研究, E-mail: changji3745@sina.com.cn. 高金森, 联系作者: Tel: 010-89733993, E-mail: jsgao@cup.edu.cn.
