Effects of metal-support interactions in Ni/USY catalysts on CO<sub>2</sub> methanation performances

LI Jiangtao; LIU Xiangyang; HUANG Yichen; QIU Li; QIN Bo; LI Ruifeng; YAN Xiaoliang

doi:10.12434/j.issn.2097-2547.20240084

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Effects of metal-support interactions in Ni/USY catalysts on CO₂ methanation performances

- Effects of metal-support interactions in Ni/USY catalysts on CO₂ methanation performances
- Vol. 50, Issue 1, Pages: 27-34(2025)
- 作者机构：
  
  1.太原理工大学化学工程与技术学院，山西太原 030024
  2.中石化（大连）石油化工研究院有限公司，辽宁大连 116045
  3.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240084
  CLC： TQ203
- Published：25 January 2025，
  
  Received：04 March 2024，
  
  Revised：21 March 2024，
- 稿件说明：
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LI JIANGTAO, LIU XIANGYANG, HUANG YICHEN, et al. Effects of metal-support interactions in Ni/USY catalysts on CO₂ methanation performances. [J]. Low-carbon chemistry and chemical engineering, 2025, 50(1): 27-34.
DOI：

LI JIANGTAO, LIU XIANGYANG, HUANG YICHEN, et al. Effects of metal-support interactions in Ni/USY catalysts on CO₂ methanation performances. [J]. Low-carbon chemistry and chemical engineering, 2025, 50(1): 27-34. DOI： 10.12434/j.issn.2097-2547.20240084.

摘要

调控金属-载体相互作用是提升负载型Ni基催化剂CO

甲烷化性能的重要途径之一。采用浸渍法通过调变溶液pH值制备了系列Ni/USY-

（

= 1、3或5）催化剂，考察了各催化剂的CO

甲烷化性能。其中Ni/USY-3催化剂在450 ℃、20 h反应条件下的稳定性测试中表现出相对最优的CO

甲烷化性能，CO

转化率和CH

选择性分别达到84.5%和95.7%。采用XRD、H

-TPR、SEM和TEM等对催化剂的物相结构、还原性能和形貌进行了表征，从微观层面系统考察了浸渍溶液pH值对催化剂结构和CO

甲烷化性能的影响。结果表明，在适宜pH值调控下，金属-载体相互作用增强，活性金属Ni晶粒的粒径减小，分散度提高。进一步借助原位FT-IR对催化剂的反应路径进行了分析，发现Ni/USY-3催化剂遵循甲酸盐路径。高分散性、较小粒径的活性金属Ni晶粒为碳酸氢盐及时氢化为关键中间体单齿甲酸盐提供了丰富的活性位点，从而实现了CO

的高效转化。

Abstract

Tailoring of the metal-support interaction is one of the important ways to improve the CO

methanation performances on the supported Ni-based catalysts. A series of Ni/USY-

(

= 1

3 or 5) catalysts were prepared by impregnation by adjusting the pH value of the solution. And CO

methanation performances of catalysts were investigated. Ni/USY-3 catalyst showes excellent CO

methanation performance with CO

conversion rate of 84.5% and

selectivity of 95.7% in stability test at the condition of 450 ℃ and 20 h. XRD

-TPR

SEM and TEM were used to characterize the structure and morphology of the catalyst

and the effects of impregnating solution pH value on the structure and CO

methanation performances of the catalysts were systematically investigated at the microscopic level. The results show that under appropriate pH value control

the metal-support interaction is enhanced

the particle size of the active metal Ni particles is reduced

and the dispersion is enhanced. Furthermore

the reaction paths of catalyst were analyzed by in situ FT-IR. The results indicate that the Ni/USY-3 catalyst follows the formate pathway. The highly dispersed and small particle size of the active metal Ni particles provide abundant active sites for the timely hydrogenation of bicarbonate into the key intermediate monodontate

leading to achieving efficient conversion of CO

关键词

CO2甲烷化金属-载体相互作用酸性

Keywords

CO2 methanationmetal-support interactionacidity

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Effects of metal-support interactions in Ni/USY catalysts on CO2 methanation performances

DOI：10.12434/j.issn.2097-2547.20240084

摘要

Abstract

关键词

Keywords

references

Effects of metal-support interactions in Ni/USY catalysts on CO₂ methanation performances