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] Ministry of Education Key Laboratory of Coal Gasification, East China University of Science and Technology, Mei Long Road No.130, Shanghai, 200237, 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：EI(收录号：20091111955189)

语种：英文

外文关键词：Pollution - Coal - Nozzles

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 N2 (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 N2 > HCN > NH3 > NO. An increase in O2/C ratio tends to favour the formation of N2. 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. ? 2009.