文献类型：期刊文献

英文题名：Distribution of HCN, NH₃, NO and N₂ in an entrained flow gasifier

作者：Chen Zhong[1];Yuan Shuai[1];Liang Qinfeng[1];Wang Fuchen[1];Yu Zunhong[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China

年份：2009

卷号：148

期号：2-3

起止页码：312

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000264918900015)】；

基金：This work was financially supported by National Basic Research Program of China (No. 2004CB217703) and Program for Changjiang Scholars and Innovative Research Team in University (IRT0620). The authors also acknowledge Prof. Wang Jie (School of Resource and Environmental Engineering, ECUST) for his helpful suggestions.

语种：英文

外文关键词：HCN; NH3; NO; N-2; Entrained flow gasifier; Coal water slurry

摘要：A laboratory gasifier with the opposed multi-burners (OMB) was used to investigate the formation of nitrogen compounds during coal water slurry (CWS) gasification. Various axial and radial concentrations of HCN, NH3, NO and N-2 (nitrogen compounds) in the gasifier were measured. The concentrations of HCN, NH3 and NO (nitrogen pollutants) were maximal at the nozzle plane and decreased along the axial distances. Moreover, the ordering of nitrogen compounds in exit was N-2 > HCN > NH3 > NO. An increase in O-2/C ratio tends to favour the formation of N-2. Flow field distribution resulted in the radial concentrations uniform at the exit and low near the side-wall at other axial positions. The results showed the majority of nitrogen pollutants formed from coal volatile nitrogen during the rapid devolatilization. HCN and NH3 formed mainly from devolatilization at the nozzle plane but were not thoroughly converted from the reduction of NO. H2O in CWS played a vital role in converting coal-N into NH3 and HCN by providing H. (C) 2009 Published by Elsevier B.V.