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A novel CO_2-water leaching method for AAEM removal from coal: Suppression of PM formation and release during Zhundong coal combustion

机译：一种新型CO_2水浸出方法，用于煤中的AAEM：Zhung煤燃烧中PM的抑制和释放

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摘要

Zhundong coalfield is one of the core coalfields in Xinjiang, China. Due to its high alkali and alkaline earth metal (AAEM) contents, large amounts of PM were released during Zhundong coal combustion, causing serious environmental pollution. In this paper, a novel CO2-water leaching method was proposed to suppress the PM formation and release during Zhundong coal combustion. The results showed the CO2-water leaching effectively removed water insoluble minerals from coal, such as Na, Ca, Mg, Cl and S, and significantly reduced the PM formation and release during the Zhundong coal combustion, especially for submicron particle formation and release. The releases of PM1, PM2.5, PM10 were reduced by 29.09%, 22.68% and 18.48%, respectively. The detailed characterizations showed that the significant removal of the easily vaporized elements in the coal by CO2-water leaching, such as Na, Ca, Mg, S and Cl, was an main factor for the suppression of PM formation and release. Besides, after CO2-water leaching, the combustion characteristics of Zhundong coal were promoted. Thus, the CO2-water leaching was a feasible method to inhibit the formation and release of PM during Zhundong coal combustion. Furthermore, since the flue gas from coal-fired power plant can be used as a source of CO2, the CO2-water leaching method provided a new way for the efficient utilization of the coal-fired flue gas.
机译：振动煤田是中国新疆的核心煤田之一。由于其高碱和碱土金属（AAEM）含量，在抗煤燃烧期间释放大量PM，造成严重的环境污染。本文提出了一种新型的CO2水浸出方法，抑制了抗煤燃烧期间PM的地层和释放。结果表明，二氧化碳水浸出有效地除去了煤中的水不溶性矿物，如Na，Ca，Mg，Cl和S，并显着降低了抗煤燃烧期间的PM形成和释放，特别是亚微米粒子形成和释放。 PM1，PM2.5，PM10的释放分别降低29.09％，22.68％和18.48％。详细表征显示，通过CO 2水浸出的煤中容易蒸发元素的显着除去，例如Na，Ca，Mg，S和Cl，是抑制PM形成和释放的主要因素。此外，在二氧化碳 - 水浸出后，促进了抗煤煤的燃烧特性。因此，CO 2水浸出是一种可行的方法，可抑制抗燃煤燃烧期间PM的形成和释放。此外，由于来自燃煤发电厂的烟道气可以用作CO2的来源，因此CO2-水浸出方法为有效利用燃煤烟气提供了一种新的方式。

著录项

  • 来源
    《Fuel》 |2020年第jul1期|117689.1-117689.9|共9页
  • 作者

    Xiong Zhao; Gao Yaxin; Li Xian; Ding Lizhi; Luo Guangqian; Yu Dunxi; Yu Xin; Yao Hong;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch China EU Inst Clean & Renewable Energy Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch China EU Inst Clean & Renewable Energy Wuhan 430074 Peoples R China|Xinjiang Univ Coll Chem & Chem Engn Key Lab Coal Clean Convers & Chem Proc Autonomous Urumqi 830000 Xinjiang Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Zhundong coal; CO2-water leaching; AAEM; Particulate matter; Combustion characteristics;

    机译：Zhundong煤;二氧化碳 - 水浸出;AAEM;颗粒物质;燃烧特性;

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