使用高温CO2作为气化剂的MSW燃气化:CO2,煤炭和挥发物之间的接触模式对最终产品的影响
Shaoheng Ge1, Mudassir Hussain Tahir1, Dezhen Chen1
1Thermal and Environmental Engineering Institute, School of Mechanical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Engineering Research Center of Multi-source Solid Wastes Co-processing and Energy Utilization, 1239 Siping Road, Shanghai 200092, China.
Waste management (New York, N.Y.)
|August 12, 2023
概括
城市固体废物 (MSW) 燃气化反应堆的设计显著影响合成气产量. 首先将二氧化碳与煤炭 (M3) 接触,优化了煤炭气化和挥发性改造,产生了高质量的合成气.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 废物管理 废物管理
- 催化剂是一种催化剂.
背景情况:
- 城市固体废物 (MSW) 热解产生适合催化改制和气化的挥发性物质和煤炭.
- 高温CO2 (HT-CO2) 可以作为气化剂和激活炭作为催化剂.
- 为MSW燃气化提供最佳反应堆设计仍然是一个挑战.
研究的目的:
- 研究HT-CO2,挥发性物质和MSW衍生的煤炭之间的接触配置对烟气化的影响.
- 了解反应行为,并制定设计高效燃气化反应堆的指导方针.
- 为了优化合成气的生产和最大限度地降低焦油产量.
主要方法:
- 设计和测试了三个不同的接触模式 (M1,M2,M3).
- M1:首先是挥发性物质和HT-CO2,然后是电荷.
- M2:挥发性物质,二氧化碳和底部炭的同时接触.
- M3:CO2首先与碳接触,然后挥发性物质在中间接触.
- 分析包括温度演变,气体产量,煤炭特性和焦油含量.
主要成果:
- 接触模式显著影响煤炭气化和挥发性改造效率.
- 模式M1导致挥发物过度热裂解 (65.41%的热量消耗),导致碳沉积和限制能量转移.
- 模式M3,其中CO2预接触煤炭,增强了催化活性,利用73.33%的输入热量用于气化和改造.
- M3实现了最高的合成气产量 (0.71 Nm3/kgMSW),最高的气体能量比率 (76.3%),以及最低的焦油产量 (5.45%).
- 在M3中使用的煤炭表现出最高的特定表面积 (10.12 m2/g).
结论:
- 接触配置对于优化MSW燃气化至关重要.
- 模式M3,涉及CO2和炭的初始接触,是非常有效的,并推用于反应堆设计.
- 这项研究为开发高效的燃气化反应堆提供了宝贵的见解,用于从MSW生产高质量的合成气体.
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