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The influence of fuel mass load oxygen supply and burning rate on emission factor and size distribution of carbonaceous particulate matter from indoor corn straw burning

機(jī)譯：室內(nèi)玉米秸稈燃燒燃料質(zhì)量荷載氧氣供應(yīng)和燃燒率對排放因子對碳質(zhì)顆粒物質(zhì)尺寸分布的影響

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摘要

The uncertainty in emission estimation is strongly associated with the variation in emission factor which could be influenced by a variety of factors, like fuel property, stove type, fire management and even methods used in measurements. The impacts of these factors were usually complicated and often interacted with each other. In the present study, controlled burning experiments were conducted to investigate the influence of fuel mass load, air supply and burning rate on the emission of carbonaceous particulate matter (PM) from indoor corn straw burning. Their impacts on PM size distribution were also studied. The results showed that EFs of PM (EFPM), organic carbon (EFOC) and element carbon (EFEC) was independent of the fuel mass load. The differences among them under different burning rates or air supply amounts were also found to be insignificant (p > 0.05) in the tested circumstances. PM from the indoor corn straw burning was dominated by fine PM, and PM with diameter less than 2.1 μm contributed about 86.4±3.9% of the total. The size distribution of PM was also influenced by the burning rate and changed air supply conditions. On average, EFPM, EFOC and EFEC for corn straw burned in a residential cooking stove were 3.84±1.02, 0.846±0.895 and 0.391±0.350 g/kg, respectively. EFPM, EFOC and EFEC were found to be positively correlated with each other, but they were not significantly correlated with EF of co-emitted CO, suggesting a special attention should be paid to the use of CO acting as a surrogate for other incomplete pollutants.
機(jī)譯：排放估算中的不確定性與排放因子的變化密切相關(guān)，排放因子的變化可能受到多種因素的影響，例如燃料性能，爐具類型，火災(zāi)管理甚至測量中使用的方法。這些因素的影響通常很復(fù)雜，并且經(jīng)常相互影響。在本研究中，進(jìn)行了受控燃燒實(shí)驗(yàn)，以研究燃料質(zhì)量負(fù)荷，空氣供應(yīng)和燃燒速率對室內(nèi)玉米秸稈燃燒過程中碳質(zhì)顆粒物（PM）排放的影響。還研究了它們對顆粒尺寸分布的影響。結(jié)果表明，PM的EF（EFPM），有機(jī)碳（EFOC）和元素碳（EFEC）與燃料質(zhì)量負(fù)荷無關(guān)。在不同的燃燒速率或供氣量下，它們之間的差異在測試環(huán)境下也被認(rèn)為是微不足道的（p> 0.05）。室內(nèi)玉米秸稈燃燒產(chǎn)生的PM以細(xì)顆粒PM為主，直徑小于2.1μm的顆粒約占總量的86.4±3.9％。 PM的尺寸分布還受到燃燒速率和空氣供應(yīng)條件變化的影響。平均而言，在家用灶具中燃燒的玉米秸稈的EFPM，EFOC和EFEC分別為3.84±1.02、0.846±0.895和0.391±0.350 g / kg。發(fā)現(xiàn)EFPM，EFOC和EFEC彼此呈正相關(guān)，但與共同排放的CO的EF沒有顯著相關(guān)，建議應(yīng)特別注意將CO用作其他不完全污染物的替代物。

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