CIESC Journal ›› 2019, Vol. 70 ›› Issue (10): 3949-3955.DOI: 10.11949/0438-1157.20190651

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Development of hydrocracking catalyst supported on Y zeolite modified with Zr

Qingyan CUI1,2(),Haobin ZHANG1,Qiang WEI2,Yuanyuan YUE1,Tinghai WANG1,Haibo ZHU1,Yasong ZHOU2(),Xianjun BAO1   

  1. 1. College of Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China
    2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2019-06-11 Revised:2019-07-22 Online:2019-10-05 Published:2019-10-05
  • Contact: Yasong ZHOU

Zr改性Y分子筛中油型加氢裂化催化剂设计制备

崔勍焱1,2(),张浩彬1,魏强2,岳源源1,王廷海1,朱海波1,周亚松2(),鲍晓军1   

  1. 1. 福州大学石油化工学院,福建 福州 350108
    2. 中国石油大学(北京)化学工程学院,北京 102249)
  • 通讯作者: 周亚松
  • 作者简介:崔勍焱(1982—),女,博士,讲师,qycui@fzu.edu.cn

Abstract:

Y zeolite was modified with Zr by equal volume impregnation method. The effects of different amounts of Zr on the structure of modified Y zeolite, the physicochemical properties of the catalyst and the performance of hydrocracking reaction were investigated systematically. The modified Y zeolite and catalyst were characterized by X-ray diffraction (XRD), NH3 temperature programmed desorption (NH3-TPD), H2 temperature programmed reduction (H2-TPR) and transmission electron microscopy (TEM). The results show that Zr modification decreased the amount of acid sites of Y zeolite, and the trend became larger with an increase of Zr content. Moreover, Zr modification availably weakened the relation of metal species and support in the catalyst with Y zeolite, and improved the dispersion of W species on the catalyst surface. The hydrocracking reaction results suggested that VGO conversion over the catalyst with Y zeolite modified with Zr decreased compared with that with Y zeolite, and middle distillates increased about 20%(mass), as well as VGO conversion gradually decreased and the middle distillates slightly increased as the Zr content increased.

Key words: catalyst, zeolite, support, hydrocracking, Zr modification, middle distillates

摘要:

采用等体积浸渍法对Y分子筛进行了Zr修饰改性,系统考察了不同用量Zr对改性Y分子筛的结构、催化剂的理化性质和加氢裂化反应性能的影响规律。通过XRD、NH3-TPD、H2-TPR和TEM等方法对改性分子筛和催化剂进行表征分析。结果表明:Zr改性降低了Y分子筛的酸量,随着改性Zr用量的增加,这种变化趋势不断增大。同时,Zr改性有效地削弱了分子筛催化剂中金属活性组分与载体间的作用,提高了W物种在催化剂表面的分散程度。加氢裂化反应结果表明:与Y分子筛催化剂相比,Zr改性Y分子筛催化剂的减压馏分油(VGO)转化率降低,中间馏分油选择性提高约20%,随着改性Zr用量的增加,VGO的转化率不断降低,中间馏分油选择性略有增加。

关键词: 催化剂, 分子筛, 载体, 加氢裂化, Zr改性, 中间馏分油

CLC Number: