制备方法对碳烟催化中Ag-Cs协同体系影响研究
Study on the effect of preparation method on Ag-Cs synergistic system in soot oxidation catalysis
阮宏程 1张雪妮 1黄丹 1杨俊 2李鸿鹄 1庄龚祖 1白泉 1郭利民3
作者信息
- 1. 中南财经政法大学信息工程学院,湖北 武汉 430073
- 2. 中南财经政法大学信息工程学院,湖北 武汉 430073;中南财经政法大学,环境管理与政策研究所,湖北 武汉 430073
- 3. 华中科技大学环境科学与工程学院,湖北 武汉 430074
- 折叠
摘要
采用离子交换法和浸渍法分别合成了Ag-Cs/ZSM-5(E)和Ag-Cs/ZSM-5(D)双金属催化剂.利用X射线衍射光谱(XRD)、X射线光电子能谱(XPS)、透射电镜(TEM)等手段表征材料的物理、化学状态.通过程序升温氧化(TPO)测试催化剂活性,发现在氧气气氛下,Ag-Cs/ZSM-5(E)和Ag-Cs/ZSM-5(D)双金属催化剂催化活性较Ag/ZSM-5有着非常明显的提升,T50从Ag/ZSM-5的546℃分别降低至Ag-Cs/ZSM-5(E)的430℃和Ag-Cs/ZSM-5(D)的464℃.同时,Ag-Cs/ZSM-5(E)比Ag-Cs/ZSM-5(D)表现出更佳的催化活性和稳定性.研究结果证实了Ag-Cs双金属的协同作用,以及ZSM-5载体上路易斯酸性位点Cs在双金属协同中的关键作用.
Abstract
Bimetallic catalysts Ag-Cs/ZSM-5(E)and Ag-Cs/ZSM-5(D)were synthesized by ion-exchange and impregnation method.The physical and chemical properties of the catalysts were characterized by X-ray diffraction spectroscopy(XRD),X-ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM),and so on.The catalyst activities were tested by temperature-programmed oxidation(TPO),and the catalytic activities of the bimetallic catalysts Ag-Cs/ZSM-5(E)and Ag-Cs/ZSM-5(D)were found to be significantly enhanced compared with those of Ag/ZSM-5under oxygen atmosphere,the T50 values decreased from 546℃for Ag/ZSM-5 to 430℃for Ag-Cs/ZSM-5(E)and 464℃for Ag-Cs/ZSM-5(D),respectively.Meanwhile,Ag-Cs/ZSM-5(E)exhibited better catalytic activity and stability than Ag-Cs/ZSM-5(D).The results confirmed the synergistic effect of Ag-Cs bimetallic and the key role of Lewis acidic site Cs on ZSM-5 support in the bimetallic synergism.
关键词
碳烟颗粒/银基催化剂/双金属协同/制备方法Key words
soot/silver-based catalyst/bimetallic synergism/synthesis method引用本文复制引用
基金项目
中南财经政法大学中央高校基本科研业务费专项资金(113/31513111314)
出版年
2024
NETL
NSTL
万方数据