CIESC Journal ›› 2019, Vol. 70 ›› Issue (3): 944-950.DOI: 10.11949/j.issn.0438-1157.20181110

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Catalytic combustion of propane over PdxPty-ZSM-5/Cordierite monolithic catalyst

Quan TANG(),Yanglong GUO(),Wangcheng ZHAN,Yun GUO,Li WANG,Yunsong WANG   

  1. 1. Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
  • Received:2018-10-02 Revised:2018-11-01 Online:2019-03-05 Published:2019-03-05
  • Contact: Yanglong GUO

用于丙烷催化燃烧的PdxPty-ZSM-5/Cordierite整体式催化剂

唐铨(),郭杨龙(),詹望成,郭耘,王丽,王筠松   

  1. 1. 华东理工大学工业催化研究所,上海 200237
  • 通讯作者: 郭杨龙
  • 作者简介:<named-content content-type="corresp-name">唐铨</named-content>(1993—),女,硕士研究生,<email>809704109@qq.com</email>|郭杨龙(1970—),男,博士,教授,<email>ylguo@ecust.edu.cn</email>
  • 基金资助:
    国家重点研发计划项目(2016YFC0204300)

Abstract:

PdxPty-ZSM-5/Cordierite monolithic catalysts were prepared on the surface of the cordierite honeycomb supports, via vacuum extraction and one coating method, in which ZSM-5 molecular sieve, alumina sol, platinum or palladium nitrates and water were used as raw materials to prepare molecular sieve slurry. Effects of Pd loading, Si/Al ratio of ZSM-5, the mass ratio of Pd/Pt on the catalytic performance of the monolithic catalysts for the catalytic combustion of propane were investigated. The monolithic catalysts were characterized by ultrasonic oscillation, SEM, XRD, H2-TPR and C3H8-TPD. When the ball milling time is 60 min and the molecular sieve slurry solid content is 38%, the coating amount of the monolith catalyst can reach 178 g?L-1, and the coating detachment rate is less than 0.5%. Pd2Pt3-ZSM-5/Cordierite catalyst (total loading of noble metals of 1.2 g?L-1 ) exhibits better catalytic activity and stability (T50=259℃, T90=323℃) for the catalytic combustion of propane, which has better industrial application prospect. Lower Si/Al ratio of ZSM-5 and the interaction between Pd and Pt increase the amounts of adsorbed propane and surface active oxygen species, thus increases the catalytic performance of the monolithic catalyst.

Key words: propane, catalytic combustion, vacuum extraction and one coating method, monolithic catalyst, molecular sieves slurry, noble metals

摘要:

以ZSM-5分子筛、铝溶胶、硝酸钯、硝酸铂和水为原料制备分子筛浆料,采用真空抽提-一次涂覆法在堇青石蜂窝陶瓷载体表面制备出PdxPty-ZSM-5/Cordierite整体式催化剂,考察了Pd负载量、ZSM-5分子筛的硅铝比和Pd/Pt质量比对整体式催化剂的丙烷催化燃烧性能的影响,并用超声波振荡、SEM、XRD、H2-TPR和C3H8-TPD等手段对整体式催化剂进行了表征。当球磨时间为60 min,分子筛浆料固含量为38%时,整体式催化剂的涂层上载量可达到178 g?L-1,涂层脱落率低于0.5%。Pd2Pt3-ZSM-5/Cordierite整体式催化剂(贵金属总负载量为1.2 g?L-1)对于丙烷的催化燃烧具有较好的催化活性(T50=259℃,T90=323℃)和稳定性,具有良好的工业应用前景,其中较低的ZSM-5分子筛硅铝比以及Pd和Pt之间的相互作用增加了对丙烷的吸附能力和表面活性氧物种的数量,从而提高了整体式催化剂的催化活性。

关键词: 丙烷, 催化燃烧, 真空抽提-一次涂覆法, 整体式催化剂, 分子筛浆料, 贵金属

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