Citation: ZHOU Jian-qiang, GAO Pan, DONG Chang-qing, YANG Yong-ping. TG-FTIR analysis of nitrogen conversion during straw pyrolysis:A model compound study[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(12): 1427-1432. shu

TG-FTIR analysis of nitrogen conversion during straw pyrolysis:A model compound study

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National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China

Corresponding author: DONG Chang-qing,
Received Date: 21 July 2015
Available Online: 14 October 2015
Fund Project: 国家自然科学基金(51206045) (51206045)国家重点基础研究发展规划(973计划,2015CB251501) (973计划,2015CB251501)中央高校基金(2015MS21)资助项目 (2015MS21)

2,5-diketopiperazine (DKPs) was selected as N-containing model compound to investigate fuel-N conversion pathway during straw pyrolysis. The experiments were conducted using a thermogravimetric analyzer coupled with a Fourier transform infrared spectrometer (TG-FTIR) in Ar atmosphere. The results show that NH₃, HCN and HNCO are the major N-containing species during DKPs pyrolysis at 20, 40 and 60℃/min. The yield of NH₃ is the largest, followed by HCN and the amount of HNCO is the lowest. With increase of heating rate, the weight loss curve moves to right and the yields of HNCO and HCN increase, while that of NH₃ decreases. K, Ca and Fe have a catalytic effect on nitrogen conversion during DKPs pyrolysis. In the presence of K and Ca, the formation of NH₃ and HCN is enhanced. Fe can promote the formation of NH₃, but inhibit the formation HCN.
- straw,
- N-containing compounds,
- DKPs,
- pyrolysis,
- nitrogen conversion
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