微通道费-托合成反应规律及本征动力学  

Reaction Law and Kinetics of Fischer-Tropsch Synthesis in Microchannel Reactor

作　　者：顾畅 侯朝鹏[1] 徐润[1] 胡志海[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2018年第1期153-160,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油化工股份有限公司合同项目(112088)资助

摘　　要：在微通道反应器中,进行了钴基催化剂的费-托合成反应规律和本征动力学研究。结果表明,在微通道反应器中,采用较小的催化剂粒径和较大的体积空速可以削弱内外扩散对费-托合成性能的影响,反应的表观活化能较高;将n(H2)/n(CO)从1.0提高到3.0能够显著提高CO的转化率以及C5+的收率;而压力在1~5 MPa范围内以及空速在20000~60000h-1范围内对选择性的影响并不明显。在温度210~230℃、压力2.0~3.0MPa、n(H2)/n(CO)为1.5~2.5、体积空速为40000h-1的条件下采集Co/Al2O3催化剂的本征动力学数据点,通过对备选模型进行拟合和比较得出最优的本征动力学方程。模型平均相对偏差为7.77%,模型能够对反应速率进行有效的预测。A microchannel reactor was used to study reaction law and kinetics of Fischer-Tropsch synthesis over cobalt-based catalyst.The experiment results show that the effects of internal and external diffusion on Fischer-Tropsch synthesis can be eliminated with small particle size of catalyst and high space velocity.The value of the apparent activation energy obtained is relatively high.Increasing n(H2)/n(CO)from 1.0 to 3.0 significantly increases CO conversion and volume space-time yield of C5+.However,effects of pressure(in the range of 1.0-5.0 MPa)and space velocity(in the range of 20000-60000 h-1)on the selectivity are not obvious.Intrinsic kinetic data was collected over Co/Al2 O3 under the following operation conditions:temperature of 210-230℃,pressure of 2.0-3.0 MPa,n(H2)/n(CO)of 1.5-2.5,GHSV of 40000 h-1.The optimal intrinsic kinetic equation was obtained by fitting and model discrimination,with mean absolute relative residuals of 7.77%.The model predicts the reaction rate effectively.

关 键 词：微通道反应器 费-托合成 反应规律 本征动力学 

分 类 号：TE65[石油与天然气工程—油气加工工程]