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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：盘锦校区管委会副主任兼教学与科研工作部部长
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：工业催化. 物理化学
办公地点：化工实验楼B427
联系方式：18641143913
电子邮箱：guoxw@dlut.edu.cn
Hydrogenation of levulinic acid into gamma-valerolactone over in situ reduced CuAg bimetallic catalyst: Strategy and mechanism of preventing Cu leaching
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论文类型：期刊论文
发表时间：2018-09-15
发表刊物：APPLIED CATALYSIS B-ENVIRONMENTAL
收录刊物：SCIE、EI
卷号：232
页面范围：1-10
ISSN号：0926-3373
关键字：Levulinic acid; gamma-Valerolactone; CuAg/Al2O3 catalyst; Metal leaching; In situ reduction
摘要：Metal leaching is a major issue in efficient production of gamma-valerolactone (GVL) from levulinic acid (LA) under mild reaction conditions. In this study, Ag was added to Cu-supported gamma-Al2O3 catalyst to suppress Cu leaching in the hydrogenation of LA into GVL. The CuAg/Al2O3 catalyst was reduced in situ during the reaction, and Cu leaching in the solution was significantly suppressed. The bimetallic catalyst without reduction pretreatment achieved approximately 100% yield to GVL and exhibited good reusability in nine consecutive cycles under mild reaction conditions of 180 degrees C and 1.4 MPa H-2 pressure in tetrahydrofuran (THF). The strong interplay in the geometric and electronic effects between Cu and Ag was verified through XPS, H-2-TPR, TEM, STEM/EDS, and XRD analyses. This paper extensively discussed the mechanism of Ag on preventing Cu leaching and the superiority of in situ reduction in solution over external reduction in gas.