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![]() ![]() ![]() ![]() ![]() ![]() |
刊名 | Fuel Processing Technology
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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
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