高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (10): 20240244.doi: 10.7503/cjcu20240244

• 研究论文: 无机化学 • 上一篇    下一篇

ZSM-5封装Pt-La双金属催化剂的制备及对异丁烷裂解反应的催化性能

胡文馨, 赵莹, 杜丹阳, 张红丹(), 程鹏()   

  1. 沈阳师范大学化学化工学院能源与环境催化研究所,沈阳 110034
  • 收稿日期:2024-05-17 出版日期:2024-10-10 发布日期:2024-07-05
  • 通讯作者: 程鹏 E-mail:zhanghd11@163.com;chengp1987@126.com
  • 作者简介:张红丹, 女, 博士, 副教授, 主要从事多级孔分子筛的制备及催化裂解性能方面的研究. E-mail: zhanghd11@163.com
  • 基金资助:
    国家自然科学基金(22172102);沈阳市中青年科技创新人才支持计划项目(RC210044)

Preparation of ZSM-5 Encapsulated Pt-La Bimetallic Catalysts and Their Catalytic Performance for iso-Butane Cracking

HU Wenxin, ZHAO Ying, DU Danyang, ZHANG Hongdan(), CHENG Peng()   

  1. Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China
  • Received:2024-05-17 Online:2024-10-10 Published:2024-07-05
  • Contact: CHENG Peng E-mail:zhanghd11@163.com;chengp1987@126.com
  • Supported by:
    the National Natural Science Foundation of China(22172102);the Shenyang Young and Middle-aged Scientific and Technological Innovation Talents Support Plan, China(RC210044)

摘要:

采用一步水热法合成了Pt-xLa@HZSM-5催化剂(x为合成体系中La与Pt的摩尔比, x=0.1, 0.25, 0.5和1.0). 利用X射线衍射、 扫描电子显微镜、 透射电子显微镜、 氨气程序升温脱附、 吡啶吸附红外光谱和X射线光电子能谱等表征了催化剂的结构、 形貌、 酸性及金属物种状态等. 活性评价结果表明, Pt-0.25La@HZSM-5对异丁烷裂解反应的催化性能最佳, 在625 ℃时, 乙烯和丙烯收率为51.1%, 而在相同反应条件下, 采用浸渍法制备的Pt@HZSM-5-0.25La催化该反应的乙烯和丙烯收率仅为41.4%.

关键词: ZSM-5, 水热合成, 封装, 金属纳米粒子, 催化裂解

Abstract:

Pt-xLa@HZSM-5 catalysts(x represents the molar ration of La to Pt, x=0.1, 0.25, 0.5 and 1.0 in the reaction system) were synthesized via one-pot hydrothermal method. The structure, morphology, acidity and metal species state of catalysts were investigated by X-ray diffraction, scanning and transmission electron microscopy, temperature-programmed desorption of ammonia, pyridine-adsorption infrared spectroscopy, and X-ray photoelectron spectroscopy. According to the results of activity test, Pt-0.25La@HZSM-5 had the best catalytic performance for iso-butane cracking, with a yield of 51.1% for ethylene and propylene at 625 ℃. However, under the same reaction conditions, the yield of ethylene and propylene was only 41.4% on Pt@HZSM-5-0.25La catalyst synthesized by impregnation method for the iso-butane catalytic cracking.

Key words: ZSM-5, Hydrothermal synthesis, Encapsulation, Metal nanoparticles, Catalytic cracking

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