典型煤灰组分与热解产物相互作用的研究

doi:10.3969/j.issn.2095-2198.2023.03.002

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摘要以CaSO₄、Fe₂O₃作为煤灰典型组分，开展典型煤灰组分与热解产物（热解气、半焦）相互作用的实验研究，并针对一些新反应、新结论利用HSC进行热力学验证.结果表明，热解温度范围内热解还原气（H₂、CO）与CaSO₄或Fe₂O₃发生氧化还原反应，降低了H₂和CO浓度，升高了CO₂浓度.半焦与CaSO₄或Fe₂O₃混合物在高温下逸出大量CO和CO₂.结合热力学分析，可以推断固体碳基还原剂被CaSO₄或Fe₂O₃大量氧化成CO和CO₂，且随着温度的升高，气体产物中CO比例逐渐增加，而CO₂比例一直下降.此外，实验及热力学研究均证明Fe₂O₃氧化活性高于CaSO₄，Fe₂O₃优先与还原性气体或者固体发生氧化还原反应.

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关键词: CaSO₄')" href="#">

CaSO₄ Fe₂O₃ 热解气半焦相互作用热力学

Abstract: In order to clarify the mechanism of coal pyrolysis with ash as the heat carrier,thermodynamic(HSC)and experimental study on the interactions between typical ash components(CaSO₄ and Fe₂O₃)and pyrolysis products(H₂,CO,CH₄ and char)are carried out.The results show that the pyrolytic reducing gas(H₂,CO)reacts withCaSO₄ or Fe₂O₃ in the pyrolysis temperature range,leading to the decrease in H₂ and CO concentration but increase in CO₂ concentration.Char is oxidized by CaSO₄ or Fe₂O₃ into CO and CO₂,and the dominant gaseous products are CO₂at low temperature and CO at high temperature.In addition,thermodynamic and experimental results show that compared with CaSO₄ and Fe₂O₃has higher reactivity,preferentially reacting with pyrolytic gas or char.

Key words: CaSO₄')" href="#">

CaSO₄ Fe₂O₃ pyrolytic gas char interactions thermodynamic

出版日期: 2023-06-30 发布日期: 2024-03-07 整期出版日期: 2023-06-30

ZTFLH:

TQ530

基金资助:

辽宁省创新能力提升联合基金项目(2021NLTS1207)；辽宁省教育厅达标立项项目(LZ2020003)

通讯作者: 贾鑫

作者简介: 王明睿（1997—），男，江苏南京人，硕士研究生在读，主要从事燃料热解气化技术的研究.

引用本文:

王明睿, 贾鑫, 陆海洋, 张玉辉, 白昊, 许光文.

典型煤灰组分与热解产物相互作用的研究 [J]. 沈阳化工大学学报, 2023, 37(3): 200-207.
WANG Mingrui, JIA Xin, LU Haiyang, ZHANG Yuhui, BAI Hao, XU Guangwen.

Study on the Interactions Between Typical Coal Ash Components and Pyrolysis Products . Journal of Shenyang University of Chemical Technology, 2023, 37(3): 200-207.

链接本文:

https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.03.002 或 https://xuebao.syuct.edu.cn/CN/Y2023/V37/I3/200

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