超强碱催化剂对碱洗胜利褐煤醇解的催化作用  

Catalytic Effect of Super Alkali Catalyst on Alcoholysis of Alkali Washed Shengli Lignite

作　　者：许浩 樊星 XU Hao;FAN Xing(School of Chemical Engineering and Technology,Xinjiang University,Urumqi Xinjiang 830017,China;College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China)

机构地区：[1]新疆大学化工学院,新疆乌鲁木齐830017 [2]山东科技大学化学与生物工程学院,山东青岛266590

出　　处：《新疆大学学报（自然科学版）（中英文）》2022年第6期681-687,共7页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：山东省自然科学基金面上项目(ZR2021MB115);煤炭资源高效开采与洁净利用国家重点实验室开放基金(2021-CMCU-KF008)。

摘　　要：采用浸渍法制备了负载型超强碱KF/γ-Al2O3催化剂,SEM和EDS表征发现KF/γ-Al2O3催化剂是孔径较小的不规则颗粒,KF在催化剂表面均匀负载.KF/γ-Al2O3催化胜利碱洗褐煤的醇解活性研究表明,醇解收率提高约一倍.这意味着超强碱催化剂具有更多的反应活性位点,促进煤有机质大分子的醇解反应.经傅里叶变换红外光谱(FTIR)分析,发现催化醇解生成了更多的酚类化合物;经实时直接分析质谱(DART-MS)分析,催化醇解提高了醇解反应的亲核反应效率,促进了芳核和脂链上的侧链解离.说明了胜利褐煤中的氧原子主要存在于芳香结构单元上.KF/γ-Al2O3catalyst was prepared by impregnation method.It was found that the KF/γ-Al2O3catalyst was irregular particles with small pore size,and KF was uniformly supported on the catalyst surface by SEM and EDS characterization.The study on the alcoholysis activity of KF/γ-Al2O3catalyzed victorious alkali washed lignite showed that the alcoholysis yield was approximately doubled.The super-alkali catalyst provides more reactive sites,which can promote the alcoholysis reaction of coal organic matter macromolecules.The alcoholysis products with and without the catalyst were studied by fourier transform infrared spectroscopy(FTIR),and it was found that more phenolic compounds were generated.Catalytic alcoholysis improves the nucleophilic reaction efficiency of the alcoholysis reaction and promotes the dissociation of side chains on the aromatic nuclei and lipid chains by real-time direct analysis mass spectrometry(DART-MS).It is found that the oxygen atoms in Shengli lignite are mainly present on the aromatic structural units.

关 键 词：KF/Γ-AL2O3 催化醇解 碱洗褐煤 

分 类 号：TQ533[化学工程—煤化学工程]