文献类型：期刊文献

中文题名：褐煤与稻壳共热解过程中氢的迁移及分布特征研究

英文题名：Study on hydrogen migration and distribution during co-pyrolysis of lignite and rice husk

作者：何培红[1];黄胜[2];吴幼青[2];吴诗勇[2]

机构：[1]国电长源湖北生物质气化科技有限公司,湖北荆门448000;[2]华东理工大学资源与环境工程学院,上海200037

年份：2021

卷号：27

期号：3

起止页码：159

中文期刊名：洁净煤技术

外文期刊名：Clean Coal Technology

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家自然科学基金资助项目(21506060)。

语种：中文

中文关键词：褐煤;稻壳;共热解;氢分布;焦油

外文关键词：lignite;rice husk;co-pyrolysis;hydrogen distribution;tar

摘要：为考察外加富氢物质对低阶煤热解焦油产率及质量的影响规律,阐明低阶煤与外加富氢物质共热解作用机理,以锡林浩特褐煤(XL)和稻壳(DK)为原料,在铝甑干馏炉中进行低温共热解,通过比较单独热解与共热解产物产率及氢分布的实际值与理论值,研究锡林浩特煤与稻壳共热解过程中氢的迁移及分布特征。结果表明:锡林浩特煤与稻壳共热解过程中发生了协同作用,稻壳木质素中的甲氧基与锡林浩特煤热解产生的自由基结合,使焦油中含甲氧基的酚类物质增多。锡林浩特煤与稻壳共热解对水和气体产物的形成存在正协同作用,与理论值相比,转移到水和气体产物中的氢分别增加了1.22%~3.33%和1.16%~2.39%;而转移到焦油中的氢降低了1.00%~3.53%。稻壳中碱金属及碱土金属元素(AAEMs)不仅加剧稻壳中焦油的二次裂解,也促进锡林浩特煤中焦油的二次裂解,导致气体中C2~C4烃产率增加,使氢从焦油中转移到气体产物中。
In order to clarify the effect of hydrogen-rich material on the yield and quality of tar from low rank coal pyrolysis and to elucidate the interaction mechanism during co-pyrolyis of low rank coal and hydrogen-rich material,Xilinhot lignite(XL)and rice husk(DK)were used as raw materials for low-temperature co-pyrolysis in an aluminium retort in this study.Hydrogen migration and distribution during co-pyrolysis of XL and DK were studied by comparing the experimental and theoretical values of yield of individual pyrolysis and copyrolysis products and the hydrogen content in pyrolysis products.Results show that there is a synergistic effect between XL and DK in copyrolysis process,the methoxy groups of lignin in DK combine with the free radicals released from XL,which increases the contents of phenolics containing with methoxy groups in co-pyrolysis tar.The co-pyrolysis of XL and DK has a positive synergistic effect on the formation of water and gaseous products.Compared with theoretical value,the hydrogen contents transferred to water and gaseous products increase 1.22%-3.33%and 1.16%-2.39%,respectively.While the hydrogen content transferred to tar decreases 1.00%-3.53%.AAEMs in DK not only intensify the secondary cracking of tar from DK,but also promote the secondary cracking of tar from XL,leading to the increase of C2-C4 hydrocarbon yield in gaseous products and the transfer of hydrogen from tar to gas.