化工学报Issue(6)：2249-2255,7.DOI:10.3969/j.issn.0438-1157.2014.06.040
煤焦直接还原脱除烟道气氮氧化物
Reduction of nitric oxide in flue gas by coal char
摘要
Abstract
NO reduction by coal char was investigated in a fixed bed reactor using a simulated flue gas. Two different operation modes(programmed temperature and constant temperature) were employed to explore the mechanism of NO removal by coal char and to study the effects of the variables on NO removal efficiency and selectivity including temperature, coal type, NO and oxygen concentrations in flue gas and space velocity. The results indicated that surface complexes formed by chemisorption of NO and O2 on carbon active sites played the key role in reactions between C-NO and C-O2. XLHT coal char showed both the highest rate of NO reduction and C-NO selectivity among the coal chars studied. NO reduction by XLHT coal char could reach 99% at 723 K. Under the experimental conditions in this work, an increase in temperature and/or oxygen concentration in flue gas enhanced NO reduction. However, C-NO selectivity decreased with the increasing O2 concentration. Higher NO concentration in flue gas led to lower NO reduction but higher C-NO selectivity.关键词
煤焦/氮氧化物/还原/选择性Key words
coal char/nitric oxide/reduction/selectivity分类
化学化工引用本文复制引用
方晓晴,范垂钢,都林,宋文立,林伟刚,李松庚..煤焦直接还原脱除烟道气氮氧化物[J].化工学报,2014,(6):2249-2255,7.基金项目
环保公益行业科研专项（201109069）。@@@@supported by the Special Funds for the Scientific Research of State Environmental Protection Public Welfare(201109069) （201109069）
