乙醇-水体系下MAS-7介孔分子筛的合成及其催化木质素液化的性能  

Synthesis of MAS-7 Mesoporous Molecular Sieves in Ethanol-Water System and Its Catalysis in Liquefaction of Lignin

作　　者：陈彦[1] 李露[1] 于凤丽[2] 解从霞[2] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2014年第3期255-261,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金："十二五"农村领域国家科技计划项目(2011BAD22B05);无机合成与制备化学国家重点实验室(吉林大学)开放课题项目(2011-18)

摘　　要：在乙醇-水体系下,合成了介孔分子筛MAS-7,通过XRD和N2吸附-脱附技术对其进行表征。结果表明,在乙醇-水体系下合成的MAS-7(1)具有和传统水热条件合成的MAS-7相同的六方介孔结构,同时具有更窄的孔径分布及更高的比表面积。将其用于催化木质素液化反应中,重点考察了分子筛合成中乙醇的用量、木质素液化反应中液化温度、液化时间、催化剂的用量等因素对催化木质素液化反应的影响。得到了较佳的工艺条件,即1g木质素中加入0.10g MAS-7(1),12mL乙二醇,185℃下反应2.5h,木质素液化率可达69%。同时,乙醇-水体系中合成的MAS-7(1)具有较好的催化稳定性。MAS-7was synthesized in the ethanol-water system.The structures of the material were characterized by X-ray diffraction and N2 adsorption-desorption.The MAS-7（1）synthesized in the ethanol-water system has the same hexagonal structure and the more narrow of pore distribution,higher specific surface area,compared with the MAS-7synthesized in the hydrothermal system.The material was applied as an efficient catalyst for the liquefaction of lignin under different conditions such as the solvent volume,catalyst amount,reaction temperature and reaction time.The optimum conditions for the liquefaction of lignin were：ethylene 12mL,MAS-7（1）0.1g,lignin 1g,reaction temperature 185℃and reaction time 2.5h.Under the optimum conditions,the liquefaction of lignin was up to 69%.In addition,the catalyst had moderate reusability in the system.

关 键 词：木质素液化 乙醇-水体系 介孔分子筛 MAS-7 

分 类 号：TQ658[化学工程—精细化工]