矿物质对煤转化过程中含氮物迁移的影响  

Effect of mineral matter on transformation of nitrogen during coal conversion

作　　者：赵娅鸿[1] 常丽萍[1] 谢克昌[1] 李灵芝 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024 [2]太原制药厂,山西太原030024

出　　处：《现代化工》2004年第z1期11-13,15,共4页Modern Chemical Industry

基　　金：国家自然科学基金(20276046);山西省自然科学基金(20041018)

摘　　要：综述了煤本身所固有的矿物质和外来添加物在煤热解、气化过程中的作用,主要针对煤中氮的形态变化和迁移规律进行了讨论。煤中的含氮物在热解气化过程中以 HCN、NH_3N_2等形式释放于气相产物之中,还是以大分子杂环化合物形式残留于煤焦和焦油之中,煤中固有的矿物质和添加剂对其在各形态间的分配比例具有较大影响。含 Fe、ca 等金属元素的化合物是对含氮物迁移转化存在明显作用的代表性物质,同时对 Fe、Ca 在煤氮催化转化生成 N_2中的可能机理和在氮氧化物形成之前进行其前驱体的抑制进行了分析。The effect of mineral matter on transformation of nitrogen during the coal pyrolysis/gasification was reviewed. The mineral matter in coal and additives can catalyze the coal pyrolysis/gasification reaction and improve the distribution of coal nitrogen in gaseous products,char and tar during the pyrolysis and gasification.The mineral matter and Fe,Ca catalyst can im- prove N_2,NH_3 and HCN formation and decrease tar-N and char-N yields.The relation of mineral matter with the release of coal nitrogen is affected by coal types,additives loaded and kinds of additive precursor.Based on above-mentioned analysis,there is possibly a new approach to minimize coal nitrogen pollution before NO_x formation.

关 键 词：煤 热解 气化 氮 矿物质 

分 类 号：TQ530.2[化学工程—煤化学工程]