中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
CO2-controlled reactors: epoxidation in emulsions with droplet size from micron to nanometre scale

文献类型:期刊论文

作者Zhao, Yueju; Zhang, Jianling; Han, Buxing; Hu, Suqin; Li, Wei
刊名GREEN CHEMISTRY
出版日期2010
卷号12期号:3页码:452-457
ISSN号1463-9262
DOI10.1039/b921538g
英文摘要The epoxidation of styrene in the cetyltrimethylammonium bromide (CTAB)/H2O/heptane/styrene/H2O2 emulsion system was investigated in the presence of compressed CO2. It was found that by controlling the CO2 pressure, the emulsion droplets can be changed in a wide range from micron to nanometre size; accordingly, the conversion was enhanced significantly with the reduced droplet size. At 5.27 MPa, the conversion in the emulsion (with droplet size of 39.5 nm) could be about 10 times higher than that in a surfactant-free system at the same pressure. The effects of other experimental conditions of CTAB concentration, reaction time, styrene concentration, amounts of H2O2, and alkalinity on the efficiency of the epoxidation were also studied, and a possible mechanism for the enhanced reaction efficiency with reduced droplet size was presented. This process has some unique advantages. For example, the reactant conversion can be easily tuned by controlling the pressure of CO2; CO2 can be used as bicarbonate source and no additional catalyst was used; CO2 can be easily removed by depressurization; the separation for the product is simple. It is believed that the CO2-tuned emulsions can be easily applied to many other chemical reactions.
语种英语
WOS记录号WOS:000275379600016
出版者ROYAL SOC CHEMISTRY
源URL[http://ir.iccas.ac.cn/handle/121111/71259]  
专题中国科学院化学研究所
通讯作者Zhang, Jianling
作者单位Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Colloid & Interface & Thermodynam, Beijing 100080, Peoples R China
推荐引用方式
GB/T 7714
Zhao, Yueju,Zhang, Jianling,Han, Buxing,et al. CO2-controlled reactors: epoxidation in emulsions with droplet size from micron to nanometre scale[J]. GREEN CHEMISTRY,2010,12(3):452-457.
APA Zhao, Yueju,Zhang, Jianling,Han, Buxing,Hu, Suqin,&Li, Wei.(2010).CO2-controlled reactors: epoxidation in emulsions with droplet size from micron to nanometre scale.GREEN CHEMISTRY,12(3),452-457.
MLA Zhao, Yueju,et al."CO2-controlled reactors: epoxidation in emulsions with droplet size from micron to nanometre scale".GREEN CHEMISTRY 12.3(2010):452-457.

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来源:化学研究所

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