期刊
CHEMISTRYSELECT
卷 1, 期 2, 页码 301-308出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201500013
关键词
biomass; hydrothermal synthesis; microporous materials; surface chemistry; solid acid
资金
- National Basic Research Program of China [2012CB626806]
- International Science & Technology Cooperation Program of China [2011DFA51980]
- National Science Foundation of China [21276266, U1510122]
- Shanxi Coal Based Key Scientific and Technological Project [MD2014-09]
- Zhengzhou Tobacco Research Institute of CNTC project [GY-KF-[2014]-001]
Spherical carbonaceous solid catalysts with -SO3H group are prepared by hydrothermal carbonization of starch followed by carbonization at low temperatures and sulfonation with H2SO4. The concentration of introduced -SO3H is determined by the amount of polar groups on carbon materials surface, and a high -SO3H group concentration (2.15 mmol g(-1)) is achieved. The spherical carbonaceous solid acid is evaluated as catalysts for the condensation of 2,4,5-triphenyl-imidazole under free solvent. Remarkably high 2,4,5-triphenyl-imidazole yields ( 93%) can be obtained efficiently (110 degrees C and 90 min) when HTS-400-SO3H was used as catalyst. The catalytic activity is determined by the acid concentration of carbonaceous solid surface. There is slight decrease in catalytic activity of HTS-400-SO3H after five runs. The starch-derived catalysts can be easily recovered by simple filtration and exhibited high activity for ten successive recycles.
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