煤炭和富含的生物质气化过程中的灰的流温度和平均摩尔离子潜力之间的相关性
Chaoyue Zhao1, Qingyun Wang1, Xiaoyong Men2
1State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
Molecules (Basel, Switzerland)
|December 9, 2023
概括
煤炭和富含的生物质的联合气化可以通过控制灰的融合温度 (FT) 来优化. 调整CaO/P2O5比率并了解矿物学,就像酸盐一样,可以减轻气化器中的废渣问题.
科学领域:
- 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
- 能源与燃料 能源与燃料
背景情况:
- 煤炭和富含的生物质的联合气化提供了清洁能源的潜力,但面临着由于和土金属 (AAEM) 的灰,渣和腐蚀的挑战.
- 生物质灰中的,特别是PO43-,可以通过与AAEM形成酸盐,特别是Ca2+来缓解这些问题.
- 了解CaO/P2O5比率对渣渣流温度 (FT) 的影响,对于优化合气化工艺至关重要.
研究的目的:
- 在不同的CaO/P2O5比率下,研究煤炭-生物质合气化中的渣渣流温度 (FT) 的行为.
- 根据化学成分和矿物学,开发一款基于 FT 废渣的预测模型.
- 评估模型在预测各种煤炭和生物质灰的FT方面的有效性.
主要方法:
- 制备和测试72种具有控制的CaO/P2O5比率,Si/Al含量和组成的合成灰.
- 使用FactSage进行热力学模拟,分析CaO/P2O5比率对FT的影响.
- 开发使用平均分子离子电位 (Ia) 方法对 FT进行预测模型,并根据文献数据进行验证.
主要成果:
- 随着CaO/P2O5比率的下降,石灰 FT和Ia的数量增加.
- 由于CaO/P2O5的减少,主要矿物阶段从石转变为石,然后转变为柏林石,这解释了灰融合温度的降低.
- 开发的模型准确地预测了19个文献灰的FT,偏差在40°C以内.
结论:
- 氧/P2O5比率是影响煤炭-生物质合气化中的废渣FT和矿物学的一个关键因素.
- Ia 方法为 FT. slag 的预测模型提供了可靠的基础.
- 已建立的模型可以有效地预测低级煤,富含的生物质及其混合灰的FT,有助于过程优化.
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