Mg掺杂钙钛矿复合催化剂的CO<sub>2</sub>甲烷化催化性能研究

白露露; 吴畏

doi:10.13205/j.hjgc.202401028

Mg掺杂钙钛矿复合催化剂的CO₂甲烷化催化性能研究

doi: 10.13205/j.hjgc.202401028

白露露,
吴畏^,

东北大学冶金学院, 沈阳 110819

详细信息

作者简介:
白露露(1997-),女,硕士,主要研究方向为固体废弃物处理及资源化。2530108051@qq.com

通讯作者:
吴畏(1967-),男,副教授,主要研究方向为固体废弃物处理及资源化。wuwei@smm.neu.edu.cn

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出版历程
- 收稿日期: 2023-03-29
- 网络出版日期: 2024-04-29

CATALYTIC PERFORMANCE OF Mg DOPED PEROVSKITE COMPOSITE CATALYST FOR CO₂ METHANATION

BAI Lulu,
WU Wei^,

College of Metallurgy, Northeast University, Shenyang 110819, China

摘要

摘要: 为促进CO₂转化与利用技术深入发展,助力“双碳”政策顺利实施,通过开展基础研究的方式,在调制具有钙钛矿复合结构的催化剂基础上,开展了一系列CO₂加氢合成甲烷(CH₄)的实验研究。对比考察了催化剂各构成要素对催化性能的影响。通过单因素变量实验,详细探究了温度与催化性能之间的关系,借助XRD、BET、SEM、CO₂-TPD、XPS等分析手段对催化剂微观结构进行详细分析和表征,解析了催化剂理化性质对催化活性的影响,明确了在钙钛矿型催化剂中掺杂Mg对调控CH₄选择性的积极作用。结果显示,催化剂La_0.9Mg_0.1Co_0.5Ni_0.5O₃在常压下具有优异的催化性能,在350~500℃内,可以获得接近100%的CH₄选择性。表征方法证明Mg的掺杂可以提供更多的CO₂吸附位点,对提升催化性能具有重要的辅助作用。
- CO₂甲烷化 /
- 钙钛矿复合催化剂 /
- 选择合成 /
- 催化活性
Abstract: In order to promote the in-depth development of CO₂ conversion and utilization technology and facilitate the smooth implementation of the "dual carbon" policy, this paper has conducted a series of experimental studies on CO₂ hydrogenation to methane based on the modulation of perovskite composite catalysts through basic research. Through comparison, the influence of catalyst composition factors on catalytic performance was investigated. Through a single factor variable experiment, the relationship between operational factors and catalytic performance was investigated in detail. The microstructure of the catalyst was analyzed and characterized in detail using analytical methods such as XRD, BET, SEM, CO₂-TPD, XPS. The impact of catalyst physicochemical properties on catalytic activity was analyzed, and the positive role of doping Mg in perovskite type catalysts in regulating CH₄ selectivity was clarified. The results show that La_0.9Mg_0.1Co_0.5Ni_0.5O₃ catalyst has excellent catalytic performance at atmospheric pressure, and can achieve nearly 100% CH₄ selectivity in the temperature range of 350 ℃ to 500 ℃. Through characterization methods, it has been proven that the doping of Mg can provide more CO₂ adsorption sites, which plays an important auxiliary role in improving catalytic performance.
- CO₂ methanation /
- perovskite composite catalyst /
- select synthesis /
- catalytic activity

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