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Sci Rep:清华大学环境学院大气所蒋靖坤研究组提出民用燃煤颗粒物污染减排建议

摘要 : 2016年2月25日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》在线发表清华大学环境学院大气污染控制教研所蒋靖坤副教授研究组题为《半焦型煤:减少中国民用燃煤一次细颗粒物、碳质颗粒物和一氧化碳的排放》的研究论文.

 2016年2月25日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》在线发表清华大学环境学院大气污染控制教研所蒋靖坤副教授研究组题为《半焦型煤:减少中国民用燃煤一次细颗粒物、碳质颗粒物和一氧化碳的排放》(Semi-coke briquettes: towards reducing emissions of primary PM2.5, particulate carbon, and carbon monoxide from household coal combustion in China)的研究论文。清华大学环境学院博士后李庆为论文第一作者。蒋靖坤和大气所郝吉明教授为论文共同通讯作者。

研究基于系统的对比实验和分析,分别提出了通过半焦型煤替换当前民用原煤而降低一次颗粒物排放的方案和通过提高炉具燃烧效率实现形成二次颗粒物的重要前体物氨气的减排。

当前我国PM2.5污染形势严峻,民用散煤燃烧是主要贡献源之一,如何经济有效地治理民用燃煤导致的污染一直是一个困扰各级政府的难题,特别是在京津冀地区。蒋靖坤等组成的研究团队提出了在民用部门用挥发份含量低的半焦型煤替代原煤的方案,基于对比实验和可行性分析,全面替代后可以分别带来一次PM2.5、黑碳和有机碳92%、98%和91%的减排,并对一氧化碳有一定的减排效果。而通过提高民用炉具的燃烧效率不但可以节能,还可以降低二次颗粒物形成的重要气态前体物—氨气的排放。这一系列研究结果将有益于解决当前民用燃煤导致的大气颗粒物污染问题。

同时,研究组在美国化学学会出版的《环境科学与技术通讯》(Environmental Science & Technology Letters)上发表题为《不同燃烧效率民用炉具燃煤和生物质的氨气排放》(Gaseous Ammonia Emissions from Coal and Biomass Combustion in Household Stoves with Different Combustion Efficiencies)。蒋靖坤研究员为文章通讯作者。

图:提高民用燃煤质量和燃烧效率而降低一次细颗粒物和二次细颗粒物前体物的排放。

原文链接:

Semi-coke briquettes: towards reducing emissions of primary PM2.5, particulate carbon, and carbon monoxide from household coal combustion in China

原文摘要:

Direct household use of unprocessed raw coals for cooking and heating without any air pollution control device has caused serious indoor and outdoor environment problems by emitting particulate matter (PM) and gaseous pollutants. This study examined household emission reduction by switching from unprocessed bituminous and anthracite coals to processed semi-coke briquettes. Two typical stoves were used to test emission characteristics when burning 20 raw coal samples commonly used in residential heating activities and 15 semi-coke briquette samples which were made from bituminous coals by industrial carbonization treatment. The carbonization treatment removes volatile compounds from raw coals which are the major precursors for PM formation and carbon emission. The average emission factors of primary PM2.5, elemental carbon, organic carbon, and carbon monoxide for the tested semi-coke briquettes are much lower than those of the tested raw coals. based on the current coal consumption data in China, switching to semi-coke briquettes can reduce average emission factors of these species by about 92%, 98%, 91%, and 34%, respectively. Additionally, semi-coke briquette has relatively lower price and higher burnout ratio. The replacement of raw coals with semi-coke briquettes is a feasible path to reduce pollution emissions from household activities.

来源: Scientific Reports 浏览次数:0

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