有效的CO2热催化化,在Ni-CZ/Attapulgite复合材料上具有高可克阻力
Shumei Chen1,2, Jiacheng Fu1,2, Yonghui Peng1,2
1Hunan Key Lab of Mineral Materials and Application, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Molecules (Basel, Switzerland)
|October 16, 2024
概括
将二氧化碳 (CO2) 转化为甲为温室气体利用提供了一个可行的解决方案. 一种新的Ni-CZ/ATP催化剂表现出极好的稳定性和对二氧化碳甲化的选择性,实现75%的转化.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 将二氧化碳 (CO2) 转化为甲 (甲化) 对于减轻温室气体排放和开发可持续能源解决方案至关重要.
- 开发高效和稳定的催化剂是二氧化碳利用技术经济可行性的关键.
研究的目的:
- 准备和描述一种新的Ni-CZ (CeO2-ZrO2) /ATP (attapulgite) 催化剂,用于二氧化碳甲化.
- 调查催化剂成分,特别是负荷和CZ与ATP的比重对催化性能的影响.
- 阐明开发的催化剂的反应机制和稳定性.
主要方法:
- 通过共同沉和浸制备催化剂.
- 使用XRD,SEM,TEM,N2吸收-脱落,XPS,H2-TPR,CO2-TPD,TG/DSC,Raman和in situ DRIFTS进行了全面的表征.
- 使用实时气色谱 (GC) 进行催化性能评估.
主要成果:
- 与未支持的CZ或ATP相比,Ni-CZ/ATP复合催化剂表现出更高的稳定性和对碳沉积的抗性.
- 在CZ/ATP矩阵上,最佳的Ni负载被确定为15%,而15Ni-0.8CZA样本在400°C时实现了75%的CO2转化和100%的CH4选择性.
- 催化剂在50小时内保持了高性能,CO2转化率为70.84%,CH4选择性为97.46%,没有显著的焦化.
结论:
- 亚塔普尔吉特支持的CeO2-ZrO2矩阵显著提高了CO2甲化对Ni物种的分散性和稳定性.
- CeO2-ZrO2固体溶液增强了氧气储存能力,这对于高效的二氧化碳转化至关重要.
- 甲酸盐被确定为CO2化反应中的主要中间体,在优化的催化剂上.
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