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Formation of NO_x precursors during wheat straw pyrolysis and gasification with O_2 and CO_2

机译：O_2和CO_2气化麦秸并气化过程中NO_x前体的形成

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摘要

The release behavior tests of NO_x precursors from wheat straw during pyrolysis in argon and gasification in 5%O_2/95%Ar and 5%CO_2/95%Ar were performed using a thermogravimetric analyzer (TGA) coupled with a Fourier transform infrared (FTIR) spectrometer. The results show that heating rate and particle size have substantial effects on the selectivity of N-conversion due to the selectivity of cracking of cyclic amides and the secondary reaction influencing the formation of NH_3, HCN and HNCO. The atmosphere influences the N-selectivity to HCN, NH_3, NO and HNCO. The formation of HCN and NH_3 in 5%O_2/95%Ar is a result of competition among the opposing effects of O_2. The presence of O_2 promotes the yields of HCN and HNCO evidently, and HNCO seems to be a favourable product from biomass-N compared in Ar atmosphere although HCN yield is a little bigger than that of HNCO. The use of CO_2 reduces the formation of HCN, the yield of NH_3 keeps essentially constant compared in Ar, and the emission of HNCO is suppressed. NH_3 seems to be a favourable product from biomass-N in 5%CO_2/95%Ar.
机译：使用热重分析仪（TGA）和傅立叶变换红外光谱（FTIR）进行了氩气热解和5％O_2 / 95％Ar和5％CO_2 / 95％Ar气化过程中麦草中NO_x前体的释放行为测试光谱仪。结果表明，由于环酰胺裂解的选择性以及次要反应影响NH_3，HCN和HNCO的形成，加热速率和粒径对N转化的选择性具有重要影响。气氛会影响N对HCN，NH_3，NO和HNCO的选择性。 5％O_2 / 95％Ar中HCN和NH_3的形成是O_2相对作用竞争的结果。 O_2的存在明显促进了HCN和HNCO的产率，尽管Arsen的HCN产率比HNCO的高一点，但在Ar气氛下，HNCO似乎是来自生物量氮的有利产物。与Ar相比，CO_2的使用减少了HCN的形成，NH_3的收率基本保持恒定，并且HNCO的排放得到抑制。 NH_3似乎是生物量-N在5％CO_2 / 95％Ar中的有利产物。

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  • 来源
    《Fuel》 |2010年第5期|p.1064-1069|共6页
  • 作者

    Qiangqiang Ren; Changsui Zhao; Xin Wu; Cai Liang; Xiaoping Chen; Jiezhong Shen; Zheng Wang;

  • 作者单位

    School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, PR China;

    School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, PR China;

    School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, PR China;

    School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, PR China;

    School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, PR China;

    Wuxi Huaguang Boiler Co., Ltd., Wuxi 214028, Jiangsu Province, PR China;

    Wuxi Huaguang Boiler Co., Ltd., Wuxi 214028, Jiangsu Province, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pyrolysis and gasification; wheat straw; TG-FTIR; NO_x precursors;

    机译：热解和气化;麦秸;TG-FTIR;NO_x前体;

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