EXAFS study of the influence on structures of Ni in Ni/CeO2-ZrO2-Al2O3 catalyst for CO2 reforming of CH4 reaction by adding vapor

LI Chunlin  FU Yilu  MENG Ming  BIAN Guozhu

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EXAFS study of the influence on structures of Ni in Ni/CeO₂-ZrO₂-Al₂O₃ catalyst for CO₂ reforming of CH₄ reaction by adding vapor

更新时间：2021-03-12

- EXAFS study of the influence on structures of Ni in Ni/CeO₂-ZrO₂-Al₂O₃ catalyst for CO₂ reforming of CH₄ reaction by adding vapor
- NUCLEAR TECHNIQUES Issue 10, (2002)
- 作者机构：
  
  1. 中国科学技术大学化学物理系
  2. 中国科学院高能物理研究所,合肥,230026
  3. ,北京,100039
- 作者简介：
- 基金信息：
- DOI：
  CLC： O643.3
- Published：01 October 2002
- 稿件说明：
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[1]李春林,伏义路,孟明,卞国柱,谢亚宁,胡天斗,张静.添加水蒸气对CH_4-CO_2重整催化剂Ni/CeO_2-ZrO_2-Al_2O_3中Ni组分结构影响的EXAFS研究[J].核技术,2002(10):879-882.

LI Chunlin FU Yilu MENG Ming BIAN Guozhu. EXAFS study of the influence on structures of Ni in Ni/CeO₂-ZrO₂-Al₂O₃ catalyst for CO₂ reforming of CH₄ reaction by adding vapor[J]. Nuclear techniques, 2002, (10): 879-882.
[1]李春林,伏义路,孟明,卞国柱,谢亚宁,胡天斗,张静.添加水蒸气对CH_4-CO_2重整催化剂Ni/CeO_2-ZrO_2-Al_2O_3中Ni组分结构影响的EXAFS研究[J].核技术,2002(10):879-882. DOI：

LI Chunlin FU Yilu MENG Ming BIAN Guozhu. EXAFS study of the influence on structures of Ni in Ni/CeO₂-ZrO₂-Al₂O₃ catalyst for CO₂ reforming of CH₄ reaction by adding vapor[J]. Nuclear techniques, 2002, (10): 879-882. DOI：

摘要

采用水热合成法制备了Ni/CeO2 -ZrO2 -Al2 O3催化剂。进行了添加和不添加水蒸气的CH4 -CO2 催化重整反应

测量了积碳量

并用EXAFS手段测试了催化剂Ni的K吸收边。结果表明

反应前后最近邻Ni-Ni配位距离无明显变化

而配位数却变化明显。无水蒸气反应后Ni-Ni配位数有较大幅度的减少 ;而添加了水蒸气

Ni-Ni配位数比反应前减少幅度小。水蒸气的添加能减少积碳量

稳定催化剂中Ni的结构

从而提高催化反应的稳定性

Abstract

Ni/CeO 2-ZrO 2-Al 2O 3 catalysts were prepared using hydro-thermal method. CO 2 reforming of CH 4 reactions were carried out with or without vapor. The amount of carbon deposit and the EXAFS of K-edge of Ni were measured. The result shows that the nearest Ni-Ni coordination distances do not change obviously

but the coordination numbers of the nearest Ni-Ni shell change obviously. The nearest Ni-Ni coordination number reduces largely after reaction without vapor. For the condition of accession of vapor

the nearest Ni-Ni coordination numbers reduce much smaller than that of without vapor. The accession of vapor can reduce the amount of carbon deposit

stabilize the Ni structure

and thereby increase the stability of CO 2 reforming of CH 4 reaction.

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