在甲燃烧中通过稀土氧化物修饰提高了Pd/酸盐-1催化剂的SO2抵抗
Jinxiong Tao1, Hongxia Lin1, Yuxi Liu2
1Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, State Key Laboratory of Materials Low-Carbon Recycling, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering and Technology, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Journal of environmental sciences (China)
|December 29, 2025
概括
一种新型的核心外催化剂使用与稀土氧化物功能化的酸盐-1,改善了甲的燃烧. 这种催化剂表现出增强的二氧化硫耐受性和长期稳定性,这对于工业应用至关重要.
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:
- 甲燃烧的以热为基础的催化剂面临由于二氧化硫 (SO2) 中毒和氧气交换不良的局限性.
- 在化物支持的 (Pd) 催化剂在暴露于SO2下的甲燃烧效率降低.
研究的目的:
- 开发一种新的分子 (酸盐-1,S-1) 催化剂,与稀土氧化物位点功能化,用于增强催化甲燃烧.
- 为了提高二氧化硫耐受性和催化剂的长期稳定性,用于甲燃烧.
主要方法:
- 使用酸盐-1 (S-1) 作为核心和稀土氧化物外 (例如,CeO2) 合成核心外催化剂结构.
- 对甲燃烧的催化性能进行评估,包括活性,反应速率和周转频率 (TOF).
- 评估催化剂稳定性和二氧化硫阻力通过长期测试和暴露于SO2.
主要成果:
- Pd/S-1@CeO2-30催化剂实现了高甲反应速率 (114.0 μmol/(gPd·s)) 和TOF (0.033 s-1),在424°C时90%的甲转化.
- CeO2外提供了卓越的长期稳定性,并促进了氧物种的供应,在400°C的10,000ppmCH4燃烧中实现了稳定的性能.
- 催化剂即使在暴露于50ppm的SO2下也显示出高的CH4转化效率,其他外如Ce0.6Zr0.4O2和Sm2O3也显示出SO2的抗性.
结论:
- 核心外结构,特别是具有CeO2外的核心外结构,显著增强了SO2吸附,并抑制了活性PdO位点的中毒.
- 稀土氧化物外有效地提高了催化剂在含有SO2的环境中的耐用性和性能.
- 这项工作为设计先进的核心催化剂提供了洞察力,用于甲燃烧应用中提高对SO2中毒的抵抗力.
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