间二甲苯为探针分子考察FCC过程中烃分子反应路径的选择性  

STUDY ON THE REACTION PATHWAY SELECTIVITY IN FCC PROCESS BY USING m-XYLENE AS A PROBE MOLECULE

作　　者：陈蓓艳[1] 何鸣元[1] 达志坚[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）》2007年第5期1-6,共6页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：在自建的多点采样的纯烃微反装置上,建立了以间二甲苯为探针分子、表征催化裂化过程中双分子反应与单分子反应相对选择性R1的方法。该方法得到的R1值与催化剂的平衡晶胞、酸中心密度有较好的相关性,与固定流化床的结果相比,趋势基本一致,可用于预测裂化催化剂上反应所得催化裂化汽油的质量。A continuously flowing micro-reactor-GC device was set up to characterize the relative selectivit molecular reaction pathways, denoted as R1, in cata system with a yo lyti f bi-molecular C spontaneous multi-sampling reaction pathways and monocracking process, in which m-xylene was used as the model molecule of raw material. The R1 value determined by the new method can be well correlated with E-cat unit cell size and acid site density, and is consistent with the product distribution obtained from fixed fluidized bed reactor. The R1 value can be used to estimate the quality of the cracking gasoline obtained in FCC process over the corresponding catalyst.

关 键 词：催化裂化 单分子反应 双分子反应 汽油烯烃 间二甲苯 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]