Combustion of Volatiles Produced in Situ from the Fast Pyrolysis of Woody Biomass: Direct Evidence on Its Substantial Contribution to Submicrometer Particle (PM1) Emission
Combustion of Volatiles Produced in Situ from the Fast Pyrolysis of Woody Biomass: Direct Evidence on Its Substantial Contribution to Submicrometer Particle (PM1) Emission
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DOI：
10.1021/ef2008216
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发表时间：
2011-08
期刊：
影响因子：
5.3
通讯作者：
Xiangpeng Gao;Hongwei Wu
中科院分区：
文献类型：
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作者：
Xiangpeng Gao;Hongwei Wu
使用新型两级热解/燃烧系统，将木质生物质在 800–1000 °C 下快速热解原位产生的挥发物在落管式炉 (DTF) 中于 1300 °C 下燃烧，以研究其对亚微米颗粒 (PM1) 排放的贡献。在热解过程中，大部分 Na、K 和 Cl (43.5–97.2%) 被挥发，随后含 Na、K 和 Cl 的挥发物的燃烧对 PM1 排放贡献很大（挥发物和焦炭燃烧收集的 PM1 总量的 77.4–89.3%）。相反，大部分（83.9-97.5%）的镁和钙保留在炭中，因此，总 PM1-10 产量的 97.5-99.7% 来自炭燃烧。热解温度的升高导致 PM0.1 产率和挥发物燃烧中 PM0.1 中 Na、K 和 Cl 质量的增加，因为热解过程中 Na、K 和 Cl 的挥发增强。 PM10 的基于质量的颗粒尺寸分布 (PSD) 以及 Na、K 和 Cl 的基于元素质量的 PSD（w...
Using a novel two-stage pyrolysis/combustion system, volatiles produced in situ from the fast pyrolysis of a woody biomass at 800–1000 °C were combusted in a drop-tube furnace (DTF) at 1300 °C to investigate its contribution to submicrometer particle (PM1) emission. During pyrolysis, the majority of Na, K, and Cl (43.5–97.2%) was volatilized and the consequent combustion of Na-, K-, and Cl-containing volatiles contributed substantially to PM1 emission (77.4–89.3% of total PM1 collected from the combustion of volatiles and char). Oppositely, the majority (83.9–97.5%) of Mg and Ca was retained in chars, and as a result, 97.5–99.7% of the yield of total PM1–10 is from char combustion. An increase in the pyrolysis temperature leads to an increase in the PM0.1 yields and the mass of Na, K, and Cl in PM0.1 from volatiles combustion, as a result of enhanced volatilization of Na, K, and Cl during pyrolysis. The mass-based particle size distributions (PSDs) of PM10 and elemental-mass-based PSDs of Na, K, and Cl (w...