对硫化合物在超临界水中的分解有机学的洞察力
Libo Lu1, Wenwen Wei1, Zijian Fang1
1State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF), Xi'an Jiaotong University, NO.28 Xianning West Road, Xi'an, 710049, Shaanxi Province, China.
Journal of environmental management
|January 26, 2025
概括
超临界水气化 (SCWG) 有效地减少有机废物的SOx排放. 这项研究揭示了超临界水的存在.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 有机废物含有主要的有机硫化合物,主要是硫.
- 超临界水气化 (SCWG) 提供了一种清洁的废物利用方法,防止SOx排放.
- 了解在超临界水 (SCW) 中的硫分解对于SCWG技术开发至关重要.
研究的目的:
- 为了研究和比较乙烯硫 (PVS),二硫 (DS) 和[b]硫1,1-二氧化物 (BD) 在SCW中的分解机制.
- 阐明SCW及其成分 (H2O,H2,自由基) 在分解途径中的作用.
- 为减少SCWG过程中产生的SO2提供理论基础.
主要方法:
- 使用石英管反应器 (400700 °C) 在热解和SCW中对硫分解特征的实验分析.
- 密度函数理论 (DFT) 计算提出多步分解路径.
- 在不同条件下的分解机制的比较分析.
主要成果:
- 与热解相比,SCW在硫分解过程中显著抑制SO2生成.
- DFT计算确定了在SCW中涉及H•和OH•激素的特定反应途径.
- 在SCW中存在自由基改变了分解路径,抑制了SO2的释放.
结论:
- 超临界水改变了硫化合物的分解路径,有效地抑制了SO2的形成.
- 这些发现为通过SCWG的清洁有机废物利用提供了理论基础.
- 这项研究加深了在SCWG过程中将硫转化为有机硫化合物的理解.
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