废弃的V2O5-WO3/TiO2催化剂的处置:基于载体转换的结构-活性关系的再生原理
Chaolu Wen1, Yanxia Guo1, Huirong Zhang1
1State Environmental Protection Key Laboratory on Efficient Resource-Utilization Techniques of Coal Waste, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan, 030006, China.
Chemosphere
|July 6, 2024
概括
消耗的V2O5-WO3/TiO2催化剂经历了谷物生长和结构变化,影响了它们的活性. 如果催化剂颗粒大小低于25nm以有效处置,建议进行回收.
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
- 环境化学环境化学
背景情况:
- 使用过的V2O5-WO3/TiO2催化剂带来了处置方面的挑战.
- 了解催化剂停用对于安全管理至关重要.
研究的目的:
- 模拟已耗尽的催化剂制备,并分析载体变化.
- 为了研究停用期间的结构-活动关系.
主要方法:
- 催化剂制备的热模拟.
- 结构和催化性表征.
- 物理化学性质的相关性分析.
主要成果:
- 催化剂载体显示了增加的颗粒大小和晶体结构转变.
- 催化剂失活与颗粒大小 (24.62 nm) 和CaWO4形成相关.
- 布伦斯特德和易斯酸部位受到影响,减少了NH3吸附和氧化.
结论:
- 催化剂失活主要与颗粒大小有关,其次是酸量和表面积.
- 建议回收使用的载体颗粒大小小小于25nm的催化剂.
- 调查结果有助于评估和管理危险的废弃催化剂.
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