红色泥通过超临界水技术增强了脱化性能,以高效地捕获SO2
Zimeng Nie1, Qun Zhao1, Qilin Zhao2
1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650500, China.
Journal of environmental management
|July 2, 2023
概括
超临界水处理有效地去化红泥 (RM),并增强其用于二氧化硫 (SO2) 清除的用途. 这种可持续的方法有助于行业的红泥利用和污染控制.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 工业固体废弃物红色泥 (RM) 由于其高性而构成全球性挑战.
- 可持续利用RM需要有效的去化和去除不溶性分数.
- 现有的RM治疗方法往往不足以完全去除.
研究的目的:
- 调查超临界水 (SCW) 和浸出剂的新型应用,以去化Bayer RM.
- 评估除化RM泥在从烟气中去除二氧化硫 (SO2) 的有效性.
- 阐明除,铁和脱硫性能背后的机制.
主要方法:
- 用超临界水 (SCW) 和氧化 (CaO) 作为液剂处理红泥.
- 对除和铁出率的分析.
- 使用含有SO2的烟气对经过处理的红泥泥的脱硫性能进行评估.
- 微观和化学分析,以了解红色泥的结构变化.
主要成果:
- 使用RM-CaO-SW泥实现了最佳的除 (97.90%) 和铁出 (82.70%).
- SCW处理破坏了酸键,将不溶性转化为可溶性.
- 与其他处理方法相比,RM-SCW泥显示出优异的脱硫性能 (88.99%超过450分钟).
- 机制包括中和,氧化还原反应和铁催化氧化.
结论:
- 超临界水处理是去化红泥的高效方法.
- 脱化红泥显示出从烟气中捕获SO2的巨大潜力.
- 这种综合方法为红泥废物利用和环境保护提供了可持续的解决方案.
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