? 能源化学(英文)
ISSN 1003-9953
     
能源化学(英文) 2017, Vol. 26 Issue (1) :115-120    DOI: 10.1016/j.jechem.2016.08.004
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Efficient production of ethyl levulinate from cassava over Al2(SO4)3 catalyst in ethanol-water system
Jin Tana,b,c, Qiying Liub,c, Lungang Chenb,c, Tiejun Wangb,c, Longlong Maa,b,c, Guanyi Chena
a School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
b Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
c Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
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摘要 One-pot achievement of ethyl levulinate from cassava was conducted in ethanol-water system over several simple sulfate salt catalysts. Al2 (SO4)3 catalyst had the best performance in synthesizing ethyl levulinate comparing with those of a series of sulfate salts. The highest yields of ethyl levulinate was up to 39.27% as well as 7.78% levulinate acid when cassava was catalyzed in ethanol medium by adding 10 wt% water. 13C and 1H NMR spectroscopic investigations confirmed that isomerization of glucose to fructose over Al2(SO4)3 catalyst is an important step in producing ethyl levulinate and levulinate acid. Due to aggregations of Al3+ under hydrothermal conditions, tiny amount of Al3+ were detected in filtrate at the percentage of 0.32% even if in absolute water. Brønsted and Lewis acids could improve the yield of ethyl levulinate and levulinate acid by synergistic effect. All results suggested that Al2(SO4)3 was a simple and efficient catalyst for ethyl levulinate and levulinate acid production.
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关键词Cassava   Ethyl levulinate   Synergistic effect   Aluminum sulfate     
收稿日期: 2016-04-22; 发布日期: 2016-08-28
基金资助:

This work was supported by the National Natural Science Foundation of China (51536009 and 51576199).

通讯作者 Longlong Ma     Email: mall@ms.giec.ac.cn
引用本文:   
.Efficient production of ethyl levulinate from cassava over Al2(SO4)3 catalyst in ethanol-water system[J]  能源化学(英文) , 2017,V26(1): 115-120
.Efficient production of ethyl levulinate from cassava over Al2(SO4)3 catalyst in ethanol-water system[J]  Journal of Energy Chemistry, 2017,V26(1): 115-120
链接本文:  
http://www.jenergchem.org/CN/10.1016/j.jechem.2016.08.004     或     http://www.jenergchem.org/CN/Y2017/V26/I1/115
 
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