摘要
利用中性氧化铝吸附并分别使用甲醇和蒸馏水脱附的方法成功分离出了组分油和储存前后M15甲醇汽油(MG_0,MG_1)中的可溶性胶质。通过气质联用分析法(GC/MS)分析了可溶性胶质的化学组成,并针对3种油样可溶性胶质的化学组成差异进行了机理分析。由结果可知:组分油、MG_0和MG_1可溶性胶质的化学组成较为一致,主要以各类芳香烃化合物为主;在同一保留时间下,3种油样中可溶性胶质对应的化合物基本一致,仅在保留时间tR=4.69,4.99,5.62 min时,3种油样中可溶性胶质对应的化合物有所变化;M15甲醇汽油中甲醇对可溶性胶质产生了一定的影响,会增加可溶性胶质中含氧前驱物和烯烃前驱物的含量,使甲醇汽油的氧化安定性变差。
The soluble gum of the gasoline,MG_0 and MG_1 were separated by the adsorption of neutral alumina,desorption of methanol and distilled water,respectively. The chemical composition of the soluble gum was analyzed by GC / MS. The chemical composition differential among three kinds of soluble gum was analyzed by the mechanism. The results showed that the chemical composition of soluble gum was nearly the same with each other among the gasoline,MG_0 and MG_1,which was mainly composed of the aromatic compounds. The compound related to the soluble gum in each oil sample was almost the same at the same retention time except when the tR= 4. 69,4. 99,5. 62 min. The methanol in the methanol gasoline（ M15） had effect on the soluble gum,the contents of the oxygen precursor and the alkene precursor were increased. However,it had bad effect on the oxidation stability.
出处
《化学工程》
CAS
CSCD
北大核心
2016年第6期22-25,共4页
Chemical Engineering(China)
