Characteristics of NOx precursors and their formation mechanism during pyrolysis of herb residues

被引：1
|
作者：
Zhan H. [1 ,2 ]
Yin X.-L. [1 ]
Huang Y.-Q. [1 ]
Zhang X.-H. [1 ,2 ]
Yuan H.-Y. [1 ]
Xie J.-J. [1 ]
Wu C.-Z. [1 ]
机构：
[1] Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou
[2] University of Chinese Academy of Sciences, Beijing
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2017年 / 45卷 / 03期
基金：
中国国家自然科学基金;
关键词：
HTW; NH[!sub]3[!/sub; NO[!sub]x[!/sub] precursors; PMW; Pyrolysis; Total yield;
D O I：
10.1016/s1872-5813(17)30017-8
中图分类号：
学科分类号：
摘要：
Based on two herb residues-herbal tea waste (HTW) and penicillin mycelial waste (PMW), characteristics of NOx precursors during their pyrolysis were investigated in a horizontal tubular reactor with the help of XPS and TGA technologies. Effects of thermal conditions and physicochemical properties of fuels were discussed and compared. The results demonstrate that protein-N is the main nitrogen form for both HTW and PMW, determining the dominance of NH3 among NOx precursors at any operational conditions. Thermal conditions would still change the ratio and total yield by intrinsically influencing their formation pathways. Subsequently, the effects could be sequenced as follows: high temperatures with rapid pyrolysis > high temperatures with slow pyrolysis > low temperatures with rapid pyrolysis ≈ low temperatures with slow pyrolysis. Moreover, at high temperatures with rapid pyrolysis, increase in particle size or decrease in moisture content would result in reduction of total yield by 5%-11% and 4%-6%, respectively. In addition, NH3 yield is produced at low temperatures or slow pyrolysis with sequence of PMW > HTW and vice versa, depending on components in the fuels. Consequently, analyses on nitrogen forms in char and nitrogen distribution indicate that total yield of 20%-45% is observed to be independent of fuel type under typical pyrolysis conditions, which may provide helpful guidance for the clean reutilization of herb residues. © 2017, Science Press. All right reserved.
引用
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页码：279 / 288
页数：9
相关论文
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