煤炭转化2017，Vol.40Issue(6)：7-13,20,8.
钾对纤维素-煤共热解过程焦炭结构和热解特性的影响
Effect of Potassium on Char Structure and Characteristics of Co-pyrolysis of Cellulose and Coal
摘要
Abstract
K2 SO4 or K2 CO3 was loaded on a microcrystalline cellulose material.The co-pyrolysis characteristics of cellulose loaded with catalyst and coal were investigated by TG-FTIR, and the chemical structure of the samples before and after pyrolysis at 900 ℃ was characterized by FTIR.The FTIR results show that the absorption peaks of carbon-containing,hydrogen-containing and oxygen-containing functional groups and kaolinite disappear after pyrolysis at 900 ℃.The disappearance of organic functional groups is due to the release of gaseous products.The change of kaolinite is caused by thermal transformation into metakaolinite and quartz.Synergistic effect is observed during the co-pyrolysis of cellulose and coal.The load of potassium salt has a great influence on the char yield,the maximum reaction rate,the reaction temperature range,and the activation energy during the co-pyrolysis.The presence of potassium salt also results in an increase in CO and CO2 yields.Moreover,the temperature ranges of CO and CO2 generation shift to lower temperatures with the addition of potassium salt,particularly the K2 CO3 .In addition, K2 SO4 has a positive effect on the evolution of products containing C—O functional groups such as acids and ketals,while K2 CO3 has a negative effect on it.K2 CO3 and K2 SO4 have different extent of negative effect on the release of CH 4 .关键词
纤维素/TG-FTIR/共热解/钾盐/化学结构Key words
cellulose/TG-FTIR/co-pyrolysis/potassium salt/chemical structure分类
能源科技引用本文复制引用
尹杰,尹艳山,赵亮,田红,刘亮..钾对纤维素-煤共热解过程焦炭结构和热解特性的影响[J].煤炭转化,2017,40(6):7-13,20,8.基金项目
国家自然科学基金资助项目(51206012)、湖南省教育厅创新平台开放基金资助项目(17K002)和能源高效清洁利用湖南省高校重点实验室开放基金资助项目(2016NGQ006,2017NGQ005). （51206012）
