磁性固体超强酸SO_4^(-2)/ZrO_2催化胜利煤超临界甲醇萃取研究  

The Shengli coal was extracted by supercritical methanol using Magnetic solid superacid catalyst SZ

作　　者：李保民[1] 袁橙[1] 张佳伟[1] 王桃霞[1] 宗志敏[1] 黄耀国[1] 魏贤勇[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221008

出　　处：《煤炭工程》2008年第3期82-85,共4页Coal Engineering

基　　金：国家自然科学基金资助项目(90410018);高等学校博士学科点专项科研基金(20020290007);教育部科学技术研究重点项目(104031)

摘　　要：用传统的方法制备了固体超强酸SO-42/ZrO2(简写为SZ)和磁性基质Fe3O4负载的固体超强酸SO4-2/ZrO2(FSZ)。用X-衍射对磁性和非磁性固体超强酸进行了表征。XRD结果表明SZ为具有高催化活性的四方晶相。以磁性和非磁性固体超强酸为催化剂,甲醇为溶剂,氮气做保护气,对胜利煤进行了超临界萃取。对萃取物进行了GC/MS分析。结果表明,萃取物种有酚类,醚类,酯类,支链烯烃等。在催化条件下的萃取率比不加催化剂的萃取率高一倍多,并且萃取物种也远远多于后者,萃后煤的粒径比萃前明显的减小。固体超强酸赋予磁性后没有影响其催化活性而且还在一定程度上使其活性有所增强。本文对磁性基质与SZ协同作用的结果、催化机理和萃取出的有机物与煤中所含官能团及相互链接的方式进行了分析和讨论,这对认识煤的大分子网络结构和煤的深加工利用都具有积极的作用。Solid superacid SZ and Fe3O4 loaded of solid superacid were prepared by the traditional method. The magnetic and non - magnetic solid superacid were characterized by X - ray diffraction. XRD results showed that the SZ were tetragonal phase with high catalytic activity. The magnetic and non - magnetic solid superacid as catalyst, methanol as solvent, nitrogen as protecting gas, the shengli coal was extracted under supercritical condition. The extracts were analyzed by GC/MS. The results showed that the extracts content phenols, ethers, esters, branched - chain olefins and so on. Compared with the non - catalyst the extraction yield under the catalyst condition was more increased, and the number of the extracted compounds is also much larger, after extraction the coal particle size was decreased significantly. It also can noted that the magnetic solid superacid not affect its catalytic activity but enhance its activity to some extent. This article analyzed and discussed the result of the coordinated action of magnetic fluid and SZ, catalytic mechanism and how the organic functional groups links with each other in coal. This is very helpful to understand the structure of the coal macromolecular network and is a positive action for the use of deep processing of coal.

关 键 词：磁性固体超强酸SZ XRD 胜利煤 超临界甲醇萃取 GC/MS检测 

分 类 号：TQ533[化学工程—煤化学工程] TQ460.66