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[1]孙琦,张玉亭,顾学红.Au/CeNaY催化剂的制备、表征及其水汽变换反应性能[J].南京工业大学学报(自然科学版),2015,37(04):11-16.[doi:10.3969/j.issn.1671-7627.2015.04.003]
 SUN Qi,ZHANG Yuting,GU Xuehong.Preparation,characterization and water-gas-shift reaction activity over Au/CeNaY zeolite catalysts[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(04):11-16.[doi:10.3969/j.issn.1671-7627.2015.04.003]
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Au/CeNaY催化剂的制备、表征及其水汽变换反应性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年04期
页码:
11-16
栏目:
出版日期:
2015-07-09

文章信息/Info

Title:
Preparation,characterization and water-gas-shift reaction activity over Au/CeNaY zeolite catalysts
文章编号:
1671-7627(2015)04-0011-06
作者:
孙琦张玉亭顾学红
南京工业大学 化学化工学院 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
SUN QiZHANG YutingGU Xuehong
State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
水汽变换 Au催化剂 CeNaY分子筛
Keywords:
water-gas-shift Au catalyst CeNaY zeolite
分类号:
TQ426.6
DOI:
10.3969/j.issn.1671-7627.2015.04.003
文献标志码:
A
摘要:
对NaY分子筛进行Ce4+交换改性,获得CeNaY载体,继而负载Au制备一系列Au/CeNaY催化剂。采用电感耦合等离子光谱分析仪(ICP-OES)、N2物理吸附仪、X线衍射仪(XRD)、高分辨透射电子显微镜(HRTEM)和H2程序升温还原(H2-TPR)等方法对负载纳米Au催化剂进行表征,并考察催化剂的水汽变换反应活性。结果表明:随着载体中Ce4+含量增加,催化剂的Au负载量逐渐提高,比表面积和孔容显著下降,且纳米Au颗粒均匀地分散于分子筛载体上。Au/CeNaY比Au/NaY具有更高的水汽变换反应活性,且Au/CeNaY催化剂的反应活性随载体中的Ce4+含量的增加而提高。在350 ℃时,Au/NaY的反应活性为2.6 mol/(mol·h),而Au/CeNaY的反应活性高达33.2 mol/(mol·h)。
Abstract:
NaY zeolite was modified by Ce4+exchange to obtain CeNaY support,which was further used to prepare Au/CeNaY catalysts.The catalysts were characterized by inductively coupled plasma optical emission spectrometry(ICP-OES),N2 adsorption,X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM)and H2 temperature programmed reduction(H2-TPR).The water-gas-shift reaction(WGSR)activity was tested for the catalysts.Results showed that the amount of Au loaded on the catalysts increased with the content of Ce4+ in the supports,while surface area and micropore volume of the catalysts reduced significantly.Au nanoparticles were evenly dispersed on NaY or CeNaY zeolite.The activity of Au/NaY was 2.6 mol/(mol·h)while Au/CeNaY was 33.2 mol/(mol·h)at 350 ℃, thus, it indicated that Au/CeNaY catalysts had higher activity than Au/NaY and their activities were improved with the increase of Ce4+ content in the support.

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备注/Memo

备注/Memo:
收稿日期:2014-04-17
基金项目:国家自然科学基金(21176117); 江苏省优秀青年基金(BK2012040)
作者简介:孙琦(1989—),男,江苏江阴人,硕士,主要研究方向为膜反应; 顾学红(联系人),教授,E-mail:xhgu@njtech.edu.cn.
引用本文:孙琦,张玉亭,顾学红.Au/CeNaY催化剂的制备、表征及其水汽变换反应性能[J].南京工业大学学报:自然科学版,2015,37(4):11-16..
更新日期/Last Update: 2015-07-08