Effect of Torrefaction on Aerosol Emissions at Combustion Temperatures Relevant for Domestic Burning and Power Generation
Effect of Torrefaction on Aerosol Emissions at Combustion Temperatures Relevant for Domestic Burning and Power Generation
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DOI：
10.1021/acsearthspacechem.2c00251
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发表时间：
2022-10
影响因子：
3.4
通讯作者：
Charles Perrie;Chase K. Glenn;Gregory Reed;Tret C. Burdette;Khairallah Atwi;Omar El Hajj;Zezhen Cheng;Kruthika V. Kumar;A. Frossard;S. Mani;R. Saleh
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文献类型：
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作者：
Charles Perrie;Chase K. Glenn;Gregory Reed;Tret C. Burdette;Khairallah Atwi;Omar El Hajj;Zezhen Cheng;Kruthika V. Kumar;A. Frossard;S. Mani;R. Saleh
经过精炼的生物质是一种很有前途的碳中性煤炭替代品。然而，在生物质燃烧过程中，燃烧对气溶胶产生的影响还没有得到充分的研究。在这里，我们比较了生松、红松和烟煤燃烧产生的气溶胶的排放和物理化学性质。在1000℃的最高燃烧温度下，煤的气溶胶排放量为5.2±0.4 mg/MJ，而原松和松材的排放量几乎可以忽略不计(<；10-2 mg/MJ)。燃煤气溶胶以无机物(85%)为主，有少量有机成分(15%)，这是发电应用中观察到的典型的可凝聚颗粒物的成分。在400℃的最低燃烧温度下，生松(25.3±4 mg/MJ)和樟子松(5.6±0.8 mg/MJ)的气溶胶排放以有机物为主。电喷雾电离质谱仪检测到的有机分子主要是CHO和CHNO基团。红松排放的芳香物较少(17%比22%)，这可以归因于与热解相关的挥发性物质含量的减少。总体而言，我们的发现支持将Torrefied Pine用于家庭燃烧和发电，因为除了碳中性外，还可以减少气溶胶排放。
Torrefied biomass is a promising carbon-neutral alternative to coal. However, the effect of torrefaction on aerosol production in biomass combustion is understudied. Here, we compared the emissions and physicochemical properties of aerosols produced by the combustion of raw pine, torrefied pine, and bituminous coal. At the highest combustion temperature of 1000 °C, aerosol emission from coal was 5.2 ± 0.4 mg/MJ, while emissions from raw and torrefied pine were negligible (<10–2mg/MJ). The coal–combustion aerosol was dominated by inorganics (85%), with a small organic fraction (15%), a composition typical of condensable particulate matter observed in power generation applications. At the lowest combustion temperature of 400 °C, aerosol emissions from raw pine (25.3 ± 4 mg/MJ) and torrefied pine (5.6 ± 0.8 mg/MJ) were dominated by organics. The organic molecules probed using electrospray ionization mass spectrometry were dominated by CHO and CHNO groups for both raw and torrefied pine. Torrefied pine emissions featured less aromatics (17% vs 22%), which can be attributed to the reduction in volatile matter content associated with torrefaction. Overall, our findings support the adoption of torrefied pine for domestic burning and power generation because of the added benefit of reducing aerosol emissions in addition to being carbon-neutral.