Chemical Industry and Engineering Progress ›› 2019, Vol. 38 ›› Issue (04): 1753-1757.DOI: 10.16085/j.issn.1000-6613.2018-1258

• Industrial catalysis • Previous Articles     Next Articles

Preparation of Mg2+ modified zeolite L catalyst supported with Pt and its aromatization performance for naphtha catalytic reforming

Peng ZHANG1,2(),Jian LIU1,Hao YU2,Genggeng WANG1,Changlu HU2,Ying YANG1,Baijun LIU1()   

  1. 1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
    2. Petrochemical Research Institute, PetroChina Company Limited, Beijing 102206, China
  • Received:2018-06-18 Revised:2018-10-08 Online:2019-04-05 Published:2019-04-05
  • Contact: Baijun LIU

Mg改性L分子筛负载Pt重整催化剂的制备及其石脑油芳构化性能

张鹏1,2(),刘坚1,喻昊2,王更更1,胡长禄2,杨英1,刘百军1()   

  1. 1. 中国石油大学(北京)化学工程学院,重质油国家重点实验室,北京 102249
    2. 中国石油天然气股份有限公司石油化工研究院,北京 102206
  • 通讯作者: 刘百军
  • 作者简介:<named-content content-type="corresp-name">张鹏</named-content>(1980—),男,博士研究生,高级工程师。E-mail:<email>zhangpengmail@petrochina.com.cn</email>。|刘百军,教授,博士生导师,研究方向为催化剂及催化新材料。E-mail:<email>bjliu@cup.edu.cn</email>。

Abstract:

In order to overcome the problems of chlorine loss and equipment corrosion caused by conventional alumina-type catalytic reforming catalyst, the Mg2+ modified zeolite L carrier (MgL) was obtained by ion exchange method and then the platinum supported reforming catalyst (Pt/MgL) without any chlorine was prepared by impregnation method. Characterizations by the use of XRD, N2 adsorption-desorption, NH3-TPD and Py-IR were carried out to analyze the physical properties of KL and MgL. Catalytic aromatization performance of the prepared reforming catalyst was investigated in a continuous-flow fixed-bed micro-reaction evaluation unit in which the industrial hydrofining naphtha with sulfur content of 0.50μg/mL was used as the feedstock. The results showed that the framework structure of zeolite L was not destroyed by the Mg2+ ion exchange. The presence of Mg2+ increased obviously the acid content and acid strength of the carrier, and thus the Mg2+ modified catalyst Pt/MgL promoted remarkably the aromatization performance. Proper high acidity played a significant role in the aromatization reaction over zeolite L reforming catalyst.

Key words: catalytic reforming, zeolite L, ion exchange, aromatization, magnesium

摘要:

为克服常规氧化铝型重整催化剂氯离子流失及对设备产生腐蚀等问题,通过离子交换法制备了Mg2+改性的L分子筛,采用浸渍法制备了不含氯离子的Pt/MgL重整催化剂,对分子筛载体进行了XRD、N2吸附-脱附、NH3-TPD和Py-IR等表征,并以硫含量0.50μg/mL工业精制石脑油为原料在固定床微反装置上评价了催化剂重整芳构化性能。结果表明,Mg2+离子交换对L分子筛的骨架结构没有破坏,Mg2+的存在提高了载体的酸量和酸强度,Mg2+改性的Pt/MgL催化剂重整芳构化性能明显提高,适当强酸性对L分子筛重整催化剂芳构化反应起到显著的促进作用。

关键词: 催化重整, L分子筛, 离子交换, 芳构化,

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd