刘民

个人信息Personal Information

副教授

博士生导师

硕士生导师

主要任职:Associate Professor

其他任职:系教工党支部书记

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. 能源化工

办公地点:大连理工大学西校区化工实验楼B421

电子邮箱:lium@dlut.edu.cn

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Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1-Butene Epoxidation

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论文类型:期刊论文

发表时间:2021-02-02

发表刊物:CHEMCATCHEM

卷号:12

期号:24

页面范围:6196-6204

ISSN号:1867-3880

摘要:Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite-1 (TS-1) to improve its catalytic activity for 1-butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO4], on the external surface of TS-1, generating some macropores. TEOA serves as structure-directing agent to form MFI topology other than the dissolution of [SiO4], and promotes the recrystallization of [SiO4], forming new TS-1 particles over the external surface. The two treatments can both improve the catalytic activity of 1-butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO4] in the case of TEOA treatment, stabilizing the structure of TS-1 and maintaining more framework Ti and intercrystal space.