文献类型：期刊文献

中文题名：多喷嘴对置式水煤浆气化炉内钠元素的释放与转化

英文题名：Release and transformation of sodium in an opposed multi-burner coal-water slurry gasifier

作者：查杰[1,2];郭庆华[1,2];龚岩[1,2];于广锁[1,2]

机构：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237;[2]煤基能源化工协同创新中心,上海200237

年份：2017

卷号：45

期号：1

起止页码：1

中文期刊名：燃料化学学报

外文期刊名：Journal of Fuel Chemistry and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金(51406056);中央高校基本科研业务费专项资金(222201414030);上海市浦江人才计划资助(15PJD011)~~

语种：中文

中文关键词：多喷嘴对置式气化炉;颗粒物;钠;释放;赋存形态

外文关键词：opposed multi-burner（OMB） gasifier; particles; sodium; release; occurrence form

摘要：基于多喷嘴对置式水煤浆气化热态实验平台,开展气化炉内钠元素的释放与转化特性研究。对收集的气化炉内轴向不同位置处颗粒物样品进行分析,利用微波消解和化学分级洗对颗粒物进行预处理,借助原子火焰吸收光谱仪(FASS)定量测定颗粒物中钠元素含量,并采用扫描电镜-能谱仪联用系统(SEM-EDS)表征颗粒物的表观形态及其表面元素组成。FAAS测定结果表明,钠元素释放率随距离喷嘴平面间距的增加呈先增加再减少的趋势,喷嘴平面附近为钠元素主要释放区域。随着炉内反应的进行,钠元素由水溶态、离子交换态向酸溶态和残渣态转变。结合SEM-EDS结果可知,炉内反应过程中,矿物质熔融形成球形颗粒物,与气相中的钠反应生成硅酸盐和硅铝酸盐,且钠元素含量随球形颗粒物的增多而增加。
Based on the bench-scale opposed multi-burner（OMB） coal-water slurry gasification experimental platform,the transformation and release characteristics of sodium during the reaction of coal in the gasifier were studied.Particles sampled at different axial distances from burner plane to top and bottom along the gasifier chamber were analyzed.After the microwave digestion and chemical fractionation analysis,the content of sodium was tested by flame atomic absorption spectrometer（FASS）.The morphololgy and elements of particles were analyzed by scanning electron microscopy and energy spectrum application system（SEM-EDS）.The FASS results showed that the release rate of sodium increased first then decreased with increasing distance to the burner plane.The area near the burner plane was the major release area of sodium.With the reaction in progress in the gasifier the occurrence form of sodium was transformed from water-soluble sodium and ion-exchangeable sodium into the acid-soluble sodium and residual sodium.Combining the SEM-EDS and FASS results,the spherical particles which were formed through melt minerals reacted with sodium in the gas phase to form silicate and sialic acid salt in gasifier.The increasing number of spherical particles led to an increase in the sodium content in the particles.