Citation: ZHAN Hao, YIN Xiu-li, HUANG Yan-qin, ZHANG Xiao-hong, YUAN Hong-you, XIE Jian-jun, WU Chuang-zhi. Characteristics of NO_x precursors and their formation mechanism during pyrolysis of herb residues[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(3): 279-288. shu

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

1.
Key Laboratory of Renewable Energy, CAS, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: WU Chuang-zhi, wucz@ms.giec.ac.cn
Received Date: 24 November 2016
Revised Date: 6 January 2017

Fund Project: the National Natural Science Foundation of China 51676195the National Natural Science Foundation of China 51661145022

Figures(10)

Based on two herb residues-herbal tea waste (HTW) and penicillin mycelial waste (PMW), characteristics of NO_x 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 NO_x 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.
- HTW,
- PMW,
- NO_x precursors,
- pyrolysis,
- NH₃,
- total yield
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沈阳化工大学材料科学与工程学院沈阳 110142

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

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通讯作者: 陈斌, bchen63@163.com

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