解活动-稳定性权衡在触媒降解含有硫的臭味VOC驱动活动场所的自动动态演变驱动的恶臭的VOC
Jian Fang1, Haoyang Pu1, Jichang Lu1
1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650050, PR China; Key Laboratory of Yunnan Province for Synthesizing Sulfur-containing Fine Chemicals, The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, PR China.
这项研究引入了一种新的纳米反应器催化剂 (t-MoO3/meso-SiO2),可以有效降解甲乙醇 (CH3SH) 和其他硫-VOCs. 催化剂通过调整活性位点并抵抗硫中毒来实现高活性和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 环境化学环境化学
背景情况:
- 含有硫的气味不佳的挥发性有机化合物 (S-VOC),特别是甲乙醇 (CH3SH),对环境和健康造成了重大关注.
- 实现S-VOC降解的催化活性和长期稳定性之间的平衡仍然是一个关键的挑战.
研究的目的:
- 开发一种高度活性和稳定的催化剂,用于降解CH3SH和其他S-VOCs.
- 为了阐明催化剂失活和硫阻力的机制,在 mesoscopic 尺度.
主要方法:
- 合成t-MoO3/meso-SiO2纳米反应器催化剂使用时间并列和空间扩展的战略.
- 现场表征技术包括H2-TPR,XPS和拉曼光谱,用于研究活性部位和反应途径的动态演变.
- 在中观尺度上研究碳和硫物种的迁移和转变.
主要成果:
- t-MoO3/meso-SiO2催化剂在CH3SH降解中表现出优越的活性和抗硫性.
- 活跃中心的动态演变和二甲基二硫化物通路的形成有助于提高性能.
- 催化剂失活从传统的中毒转向活性阶段破坏,中孔结构改善了硫的容纳.
结论:
- 开发的纳米反应器催化剂有效地克服了S-VOC降解中的活动稳定性权衡.
- 催化剂在现实条件下表现出色,包括存在水蒸气和双组分硫醇.
- 这一策略在减少S-VOC中具有广泛应用的巨大潜力.
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