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改性生物柴油碳煙與NOx排放試驗
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國家自然科學(xué)基金資助項目（50776042）;江蘇省重大項目（10KJA47009）;江蘇省創(chuàng)新項目（CX10B—261Z）


Experiment on the Smoke and NOx Emissions of Modified Biodiesel
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    摘要:

    針對生物柴油氧化安定性較差、NOx排放偏高的情況,，添加抗氧化劑（BHA）對生物柴油進(jìn)行燃料改性,，分析了抗氧化劑對生物柴油氧化安定性的影響,，討論了改性前,、后生物柴油粘度隨溫度的變化規(guī)律,。測量了高壓共軌柴油機燃燒改性生物柴油的排放污染物隨轉(zhuǎn)速,、負(fù)荷的變化規(guī)律,。探討了抗氧化劑改善生物柴油碳煙,、NOx排放的作用機理,。研究結(jié)果表明：燃料改性后，生物柴油的氧化安定性大幅度提高,，燃油粘度略有降低,；發(fā)動機的碳煙、NOx排放均明顯下降,，特別是在中,、高負(fù)荷時效果顯著；燃燒過程中抗氧化劑抑制了脂肪酸長鏈分子的高溫裂解,，促進(jìn)了自由基的淬熄效應(yīng),，由此改變了碳煙與NOx排放之間此消彼長的關(guān)系。

    Abstract:

    Because of the poor oxidation stability and the high NOx emissions, biodiesel fuel was redesigned by adding anti-oxidants. The oxidation stability and viscosity of the biodiesel have been measured and analyzed. The engine experiment was conducted and it was fueled by biodiesel and BHA/biodiesel, NOx emission and smoke were measured. The mechanism of anti-oxidants to decrease the smoke, NOx emission was discussed. The results showed that BHA additive was a high effective antioxidant of biodiesel, the viscosity of biodiesel was decreased slightly; and the emission smoke and NOx was decreased significantly, especially at the high load condition. Anti-oxidants can restrain the high-temperature dissociation of long-chain fatty acid molecules during the combustion process, and it can promote the quenching effects of free radical. Also, it can change the “trade-off” tradition relationship between smoke and NOx emissions. 

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許廣舉,王忠,毛功平,王小哲.改性生物柴油碳煙與NOx排放試驗[J].農(nóng)業(yè)機械學(xué)報,2011,42(1):8-11. Xu Guangju, Wang Zhong, Mao Gongping, Wang Xiaozhe. Experiment on the Smoke and NOx Emissions of Modified Biodiesel[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(1):8-11.

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