孟长功

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:中科院金属所

学位:博士

所在单位:化工学院

学科:无机化学

办公地点:大连理工大学化学楼401

联系方式:13940825088

电子邮箱:cgmeng@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Solvothermal conversion of magadiite into zeolite omega in a glycerol-water system

点击次数:

论文类型:期刊论文

发表时间:2014-03-01

发表刊物:JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

收录刊物:SCIE、EI、Scopus

卷号:89

期号:3

页面范围:419-424

ISSN号:0268-2575

关键字:crystallization; synthesis; characterization; zeolites

摘要:BACKGROUNDZeolite omega is used as a catalyst in various fields. Expensive tetramethylammonium cations are the conventional structure-directing agents for the synthesis of zeolite omega. In this work, glycerol was used as both solvent and structure-directing agent instead of expensive quaternary ammonium compounds. Zeolite omega has been obtained through conversion of magadiite in this glycerol-water system. The effects of various parameters such as reaction time, temperature, alkalinity and glycerol content were discussed.
   RESULTSPure zeolite omega could be obtained at 120 degrees C for 10 days with the reactants molar composition of 14 SiO2: Al2O3: 10 Na2O: 169 H2O: 200 glycerol. Water content plays an important role in the solvothermal conversion of magadiite to zeolite omega.
   CONCLUSIONThe zeolite omega obtained from this system is a rather pure phase free from impurities. A preferential location of the Al atoms in the six-membered rings of the gmelinites in zeolite omega was observed. A method including extraction and calcination was introduced to remove organic species by which highly ordered pore structure of zeolite was well retained. The present work develops a novel synthesis method for zeolite omega. (c) 2013 Society of Chemical Industry