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发酵时间对城市固体废物的热解动力学特征的影响
Zheng Jian1, Dehong Gong1, Yuhang Xie1
1Electrical Engineering College, Guizhou University, Guiyang 550025, China.
ACS omega
|September 22, 2025
概括
城市固体废物的发酵会改变其热解动力学. 早期发酵增加了激活能量和炭的产量,而后来的阶段减少了这些,影响了废物转化为能源的过程.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 城市固体废物 (MSW) 发酵影响其随后的热解行为.
- 了解这些变化对于优化废物能源技术至关重要.
研究的目的:
- 调查MSW成分在发酵过程中的恶化对热解动力学的影响.
- 分析在7天发酵期内热解特征的演变.
主要方法:
- 在40°C下模拟MSW发酵7天,每天取样.
- 使用热重力测量分析 (TGA) 的热解实验.
- 动力分析采用总体图表方法.
主要成果:
- 热解发生在两个阶段,具有不同的激活能量 (第一阶段:180-200 kJ/mol,第二阶段:268-360 kJ/mol).
- 激活能量和焦炭产量在发酵的1-3天达到峰值,然后下降.
- 热解反应机制随着发酵时间的变化而变化,遵循随机核和生长模型.
结论:
- 发酵显著改变了MSW热解动力学和煤炭产量.
- 早期发酵增强了 pyrolysis 潜力,而后来的阶段减少了它.
- 观察到的动力学和机制变化为发酵的MSW的热化学转化提供了洞察力.
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