不同载体Pt基整体式催化剂对氢气低温反应性能的影响

周颖; 唐爱坤; 倪强; 李冲

不同载体Pt基整体式催化剂对氢气低温反应性能的影响

江苏大学能源与动力工程学院

基金项目:

国家自然科学基金资助项目(51676088)

详细信息

作者简介:
周颖(1994—),女,四川成都人,硕士研究生(zzcoquer@163.com),主要从事低温催化燃烧研究;唐爱坤(1981—),男,江苏盐城人,教授(tycoon@ujs.edu.cn),主要从事微尺度燃烧及微型动力系统、低温催化燃烧、新能源汽车热管理、相变储能等研究

中图分类号: TQ426;TQ038
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出版历程
- 收稿日期: 2021-03-19
- 刊出日期: 2023-03-09

Effect of Pt-based monolithic catalysts with different support on low temperature reaction performance of hydrogen

School of Energy and Power Engineering, Jiangsu University

摘要

摘要: 以H型分子筛-5（hydrogen zeolite sieve molecular-5,HZSM-5）和氧化物（Al₂O₃、TiO₂和SiO₂）涂层为载体、堇青石蜂窝陶瓷为基体、贵金属铂（Pt）为活性组分，制备了Pt/载体/堇青石整体式催化剂.利用XRD、SEM、TEM和XPS等表征手段，对催化剂的结构与性质进行了分析.探讨了在氢气体积分数为2.5%的环境中，不同载体、不同Pt负载量对氢气低温催化燃烧反应性能的影响.研究结果表明：以HZSM-5为载体的整体式催化剂性能最优，这与催化剂活性层黏结性良好、Pt在该载体上的分布良好及其粒径均匀有关；以SiO₂为载体的催化剂性能最差，测试显示这种载体上Pt⁰种类含量最少，且Pt负载不牢；Pt负载量为0.01 g·L^-1时，Pt/HZSM-5/堇青石整体式催化剂的催化活性较好；Pt负载量为0.05 g·L^-1及以上时，整体式催化剂均能在室温下快速起燃，并实现氢气转化率为100%.
- 整体式催化剂 /
- 堇青石 /
- 负载量 /
- 铂 /
- 氢气低温催化燃烧 /
- H型分子筛-5
Abstract: A monolithic catalyst Pt/support/cordierite was prepared with hydrogen zeolite sieve molecular-5（HZSM-5） and oxides（Al₂O₃,TiO₂ and SiO₂） coating as support, cordierite as matrix and Pt as active component. The structure and properties of the catalyst were characterized by XRD, SEM, TEM and XPS. The effects of carriers and Pt loads on the catalytic reaction performance of hydrogen in low temperature were investigated when the volume concentration of hydrogen is 2.5%. The results show that the monolithic catalyst supported by HZSM-5 has the best performance, which is related to the good adhesion of the active layer, the good distribution of Pt and the uniform particle size. The catalyst with SiO₂ as support shows the worst performance, because the support has the least Pt~0 with weak Pt load. Pt/HZSM-5/cordierite monolithic catalyst shows better catalytic activity when the load of Pt is 0.01 g·L^-1. With Pt load of 0.05 g·L^-1 and more, Pt/HZSM-5/cordierite monolithic catalyst can rapidly set up even at room temperature and achieve 100% conversion.
- monolithic catalyst /
- cordierite /
- load /
- Pt /
- low temperature catalysis combustion of hydrogen /
- HZSM-5

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参考文献(15)

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