中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Two-step synthesis of dimethyl carbonate from urea, ethylene glycol and methanol using acid-base bifunctional zinc-yttrium oxides

文献类型:期刊论文

作者Wang PX(王培学)1,2; Liu SM(刘士民)1; Zhou F(周锋)1,2; Yang BQ(杨本群)1,2; Ahmad S. Alshammari3; Lu LJ(卢六斤)1; Deng YQ(邓友全)1
刊名Fuel Processing Technology
出版日期2014
卷号126页码:359-365
关键词Urea Ethylene carbonate Dimethyl carbonate Acid-base bifunctional catalysts
ISSN号0378-3820
通讯作者邓友全
英文摘要

The binary zinc-yttrium oxides with different precursors were prepared by co-precipitation method and used in the catalytic synthesis of dimethyl carbonate (DMC) via a two-step process using urea, ethylene glycol and methanol as raw feed-stocks. The first step involves reaction of urea with ethylene glycol (EG) to form ethylene carbonate (EC), and 96% conversion of urea with 98% selectivity of EC was obtained. In the second step, namely transesterification of EC formed with methanol to give DMC and EG, the conversion of EC was up to 72% in 15 min with a 99% selectivity of DMC, corresponding to a TOF of 864 mmol/h gcat. XRD results showed that the catalyst with a zinc nitrate precursor has a remarkable interaction between zinc and yttrium oxides. TPD characterization indicated that in the catalyst with a zinc nitrate precursor there was a cooperative effect between weak acid and medium base sites on the surface of the catalyst, suggesting that the prepared catalysts are acid–base bifunctional. The synergistic effect between zinc and yttrium oxides, in combination with acidity of zinc oxide and basicity of yttrium oxide, may be responsible to the high catalytic activity and selectivity.

学科主题物理化学与绿色催化
收录类别SCI
语种英语
WOS记录号WOS:000340329600041
源URL[http://210.77.64.217/handle/362003/19554]  
专题兰州化学物理研究所_绿色化学研究发展中心
作者单位1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Green Chem & Catalysis, Lanzhou 730000, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.King Abdulaziz City Sci & Technol, Natl Nanotechnol Res Ctr, Riyadh 11442, Saudi Arabia
推荐引用方式
GB/T 7714
Wang PX,Liu SM,Zhou F,et al. Two-step synthesis of dimethyl carbonate from urea, ethylene glycol and methanol using acid-base bifunctional zinc-yttrium oxides[J]. Fuel Processing Technology,2014,126:359-365.
APA Wang PX.,Liu SM.,Zhou F.,Yang BQ.,Ahmad S. Alshammari.,...&Deng YQ.(2014).Two-step synthesis of dimethyl carbonate from urea, ethylene glycol and methanol using acid-base bifunctional zinc-yttrium oxides.Fuel Processing Technology,126,359-365.
MLA Wang PX,et al."Two-step synthesis of dimethyl carbonate from urea, ethylene glycol and methanol using acid-base bifunctional zinc-yttrium oxides".Fuel Processing Technology 126(2014):359-365.

入库方式: OAI收割

来源:兰州化学物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。