燃料化学学报2017，Vol.45Issue(10)：1185-1190,6.
准东煤水热提质过程中煤质特性变化对CO2气化影响
Changes of Zhundong coal properties by hydrothermal upgrading and its impacts on CO2 gasification
摘要
Abstract
The Zhundong high sodium coal was hydrothermally upgraded at 150-350℃ in an autoclave.The inductively coupled plasma mass spectrometer (ICP-MS),nitrogen adsorption isotherm (BET) and X-ray diffraction (XRD) were used to investigate the changes of coal properties and the impacts on the CO2 gasification characteristics.The results indicate that the coal quality is increased after the hydrothermal upgrading.The removal effect of sodium is obvious,reaching to more than 95％ at 300-350℃.The pore structure of the chars changes significantly,the specific surface area and total pore volume increase initially at 150-300℃ and then decrease at 300-350℃.The crystalline structure tends to be aromatic and graphitized,and the chemical structure becomes dense,orderly and stable.Additionally,the gasification reactivity exhibits a decreasing trend,especially for the chars treated at 300-350℃.The CO2 gasification reactivity during the process of hydrothermal upgrading is comprehensively influenced by different factors containing coal rank,sodium content,physical pore structure and chemical microcrystalline structure.关键词
准东煤/水热提质/煤质特性/脱钠/CO2气化Key words
Zhundong coal/hydrothermal upgrading/coal properties/sodium removal/CO2 gasification分类
化学化工引用本文复制引用
张小培,张成,余圣辉,李鑫,冯小飞,马亚飞,陈刚..准东煤水热提质过程中煤质特性变化对CO2气化影响[J].燃料化学学报,2017,45(10):1185-1190,6.基金项目
The project was supported by National Natural Science Foundation of China (51676076),National Program of International Science and Technology Cooperation(2015DFA60410) and Graduates' Innovation Fund of HUST(5003120003).国家自然科学基金(51676076),国家国际科技合作专项(2015DFA60410)和华中科技大学自主创新研究基金(5003120003)资助 （51676076）
