通过Pt-Ni/CeO2氧载体通过低温和高效降低含有CO2的O2混合物
Xueyan Sun1,2, Wei Zhao1, Chenghua Wang1
1Shaanxi Key Laboratory for Carbon Neutral Technology, School of Chemical Engineering, Northwest University, Xi'an, 710127, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 13, 2024
概括
新的Pt-Ni双金属基氧气载体在低温下有效地减少不纯二氧化碳 (CO2). 这一突破使得在碳中和循环的化学循环中直接利用二氧化碳成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 催化剂是一种催化剂.
背景情况:
- 传统的氧气载体与氧气 (O2) 耐受性差和高反应温度作斗争,阻碍通过化学循环直接利用不纯的二氧化碳 (CO2).
- 开发强大的氧载体对于高效的二氧化碳转化和实现碳中和循环至关重要.
研究的目的:
- 开发基于Pt-Ni双金属基的氧载体,具有增强的O2耐受性,用于低温CO2减排.
- 在O2杂质的存在下研究这些新型氧载体的性能和稳定性.
主要方法:
- 在Pt-Ni双金属基氧载体的合成.
- 在700°C的CO2转化效率与O2杂质在料气中的评估.
- 分析Pt-Ni双金属在甲部分氧化和CO键断裂中的作用.
- 在氧化还原循环期间评估结构和性能稳定性.
主要成果:
- 在700°C使用0.1 wt% Pt-0.1wt% Ni/CeO2氧载体与16.7% O2杂质,实现了高CO2转化 (≈92%) .
- 证明Pt-Ni双金属增强甲部分氧化和CO键断裂,减轻竞争性O2氧化.
- 在多个氧化还原循环中证实了Pt-Ni/CeO2载体的优良结构和性能稳定性.
结论:
- 基于Pt-Ni双金属基的氧气载体提供了优异的O2耐受性,并在低温下能够有效减少CO2.
- 这一战略为直接利用不纯二氧化碳提供了一条可行的途径,为碳中和能源循环做出贡献.
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