›› 2018, Vol. 49 ›› Issue (9): 79-86.

• 催化剂 • 上一篇    下一篇

固体超强酸催化N-C50/C60异构化催化剂的成型及寿命研究

章红艳,宋月芹,倪海微,徐俊,周晓龙   

  1. 华东理工大学化工学院石油加工研究所
  • 收稿日期:2018-02-07 修回日期:2018-05-17 出版日期:2018-09-12 发布日期:2018-09-28
  • 通讯作者: 章红艳 E-mail:hyzhang940126@163.com

MODELING AND LIFE TEST OF SOLID SUPERACID CATALYST FOR n-C50/C60 ISOMERIZATION

  • Received:2018-02-07 Revised:2018-05-17 Online:2018-09-12 Published:2018-09-28

摘要: 采用挤条法制备了一系列Pt/SO42-/ZrO2-Al2O3(PtSZ/A) 催化剂,考察了黏结剂的种类、含量以及焙烧温度对PtSZ/A催化剂异构化性能的影响,确定了最优的黏结剂种类、含量和焙烧温度,并进一步对催化剂进行了溶剂处理。采用X射线衍射(XRD)和热重(TG)分析手段对催化剂的晶相结构和硫含量进行了表征,在微型固定床反应器上进行了PtSZ/A催化剂的寿命试验。结果表明:以拟薄水铝石为黏结剂成型的PtSZ/A催化剂有较高的C5/C6异构化活性和机械强度,其合适的焙烧温度为650 ℃,用溶剂处理后其异构化活性进一步提高,在使用精制石脑油为原料进行反应时,1 400 h时的正戊烷转化率为62.5%,正己烷转化率在90%以上,2,2-二甲基丁烷选择性在35%以上。

关键词: 固体超强酸, 异构化, 成型, 寿命, 正戊烷/正己烷

Abstract: The Pt/SO42-/ZrO2-Al2O3 (PtSZ/A) catalyst with binders were prepared by extrusion method. The effects of binders, dosage and calcination temperature on the isomerization and physicochemical properties of PtSZ/A catalysts were studied to determine the best conditions for preparation. The catalysts prepared were further treated by solvent. The crystal structures and sulfur contents of the catalysts were characterized by XRD and TG, respectively. The life test of the catalyst was conducted in a micro-fixed bed reactor. The results indicated that the PtSZ/A catalyst with pseudo-boehmite as binder showed higher n-C50/C60 isomerization activity and mechanical strength. The suitable calcination temperature is 650 ℃. After solvent treatment, the isomerization performance of PtSZ/A catalyst is further improved. Using refined naphtha as feed, the conversion rate of n-C50 and n-C60 is 62.5% and 90%, respectively in 1 400 h running. The selectivity of 2,2-dimethylbutane achieves 35% or more.

Key words: solid superacid, isomerization, molding, lifetime, n-C50/C60