Nitrogen transformation during coal decoulping combustion I: release behavior of coal-nitrogen during pyrolysis stage

被引：0

作者：

Xie, Jian-Jun ^{[1
,2
]}

Yang, Xue-Min ^{[1
]}

Zhu, Wen-Kui ^{[1
,2
]}

Ding, Tong-Li ^{[1
,2
]}

Song, Wen-Li ^{[1
]}

Lin, Wei-Gang ^{[1
]}

机构：

[1] Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

[2] Graduate University of Chinese Academy of Sciences, Beijing 100049, China

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2012年 / 40卷 / 08期

关键词：

Char nitrogen - Decoupling combustions - Effects of temperature - Fixed-bed reactors - HCN - Mass percentage - Nitrogen transformations - Release behaviors - Residence time - West China;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Effect of temperature and residence time on coal-nitrogen transformation during pyrolysis of 3 coals from west China was studied in a fixed bed reactor. The results show that the duration time of HCN releasing is about 3 min at 1 073 K for pyrolysis of coal A. The start release time of HCN is earlier than that of NH3, and the released amount of HCN quickly drops to zero as NH3 starts to release. The accumulated release amounts of HCN and NH3 first reach the maximum value at different pyrolysis time and then decrease sharply. The yield of char-nitrogen increases with increasing temperature. At 973~1 123 K, about 50~60 mass percentage of the coal-nitrogen exits in char as char-nitrogen and the rest is released as volatiles, in which about 20~50 mass percentage of the volatile-nitrogen is NH3 and HCN. The mass percentage of NH3 accounts for 40%~50% and that of HCN about 50%~60% in the volatile-nitrogen.

引用

页码：919 / 926