摘要
采用轴径向二维扩散模型对提升管一下行床耦合反应器催化裂化反应进行了数学模拟,并与提升管及下行床进行了对比。结果表明,在下行床之前耦合一段适当长度的提升管不仅可以保证原料具有较高的转化率,而且可以保证目的产品的选择性较高,缩短达到相同产品收率所需的下行床长度。这种耦合反应器充分利用了提升管与下行床各自的优势,并可以根据具体的原料及产品需求调整进料的位置以改变提升段与下行段的长度比例,实现柔性操作。
A two-dimensional dispersion model was used to simulate the tluid catalytic cracking （FCC） process occurring in a riser-downer-coupling reactor. The performances of the riser, the downer and the coupling reactor were compared. The simulation results showed that high conversion of feedstock and high selectivity of desired products were both achieved in the coupling reactor. To obtain the same gasoline yield, the downer part in the coupling reactor should be much shorter than a single downer reactor. This demonstrated that the coupling reactor takes advantages of both the riser and the downer. In addition, the coupling reactor can be operated flexibly to match the changes in feedstock supplies and product demands by adjusting the lengths of the riser and the downer.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2007年第1期30-34,共5页
Chemical Reaction Engineering and Technology
