鑫源煤在有机溶剂中的溶胀特性研究  

STUDY ON SWELLING PROPERTIES OF XINYUAN COAL IN SOME ORGANIC SOLVENTS

作　　者：李沙沙[1] 盛清涛[1] 范济民[1] 申峻[1] 

机构地区：[1]太原理工大学化学化工学院,太原硕士生030024

出　　处：《煤炭转化》2014年第1期11-14,22,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(21076137);山西省回国留学人员基金资助项目(2012-037);山西省高等学校优秀青年学术带头人项目(TYAL2011)

摘　　要：对不同溶胀时间、不同溶剂、矿物质、预处理和金属无机盐等实验条件下鑫源低阶烟煤的溶胀行为和溶胀动力学进行了研究.结果表明,随着时间的延长,溶胀率逐渐增大,48 h溶胀基本达到平衡,溶胀特征是典型的slow-climbing-type溶胀;煤在混合溶剂中的溶胀率大于单一溶剂中的溶胀率,在极性溶剂中的溶胀率大于非极性溶剂中的溶胀率;脱除矿质元素后,煤溶胀率增大;溶胀、酸洗和碱洗使煤溶胀率增大,烘干使煤溶胀率减小;溶胀动力学表明,该煤的溶胀行为符合一级反应动力学方程,在THN和吡啶溶剂中的表观活化能均小于20 kJ/mol,这与煤中范德华力的破坏相对应,溶胀机制是由Case-Ⅱ扩散控制的.In this paper,the influence of different swelling time,different solvents,mineral elements,pretreatment,metal inorganic salt on swelling behavior and the swelling kinetics of Xinyuan low order bituminous coal were investigated.The results show that the swelling rate increased gradually with the extension of time,and swelling basically balanced for 48 h,the slow-climbing-type solventswelling processes were observed.The swelling rate of coal in the mixed solvent was higher than the single solvent,the swelling rate of coal in polar solvent was higher than the non-polar solvent; mineral elements were removed,the swelling rate increased; swelling,acid washing and alkaline washing made the swelling rate increase,drying made the swelling rate reduce; metal inorganic salt improved coal swelling differently; the swelling behavior of coal corresponded to first-order reaction kinetics equation,the apparent activation energy of coal in THN and pyridine were less than 20 kJ/mol,the swelling process was affected by Case-Ⅱ diffusion.

关 键 词：鑫源煤 溶胀 溶胀率 动力学 

分 类 号：TQ531[化学工程—煤化学工程]