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Non-catalytic recovery of phenol through decomposition of 2-isopropylphenol in supercritical water |
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| Authors: | Takafumi Sato Tadafumi Adschiri |
| Affiliation: | a Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology, 4-2-1, Nigatake, Miyagino, Sendai 983-8551, Japan b Department of Chemical Engineering, Tohoku University, 07 Aoba, Aramaki-Aza, Aoba-ku, Sendai 980-8579, Japan c Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba, Sendai 980-8577, Japan |
| Abstract: | The decomposition of 2-isopropylphenol (IPP) was studied in supercritical water at 723- with a water density of 0- in the absence of catalyst. The main products were phenol, 2-propylphenol (PP), 2-cresol and 2-ethylphenol. The reaction was determined to proceed as follows. At first, the dealkylation and rearrangement of IPP yielded phenol and PP, respectively. Next, the dealkylation of PP lead to the formation of 2-cresol and 2-ethylphenol. The conversion of IPP and the selectivity of phenol increased with the increasing water density, which led to an increase in the yield of phenol. The recoveries of phenol as high as 43% can be obtained in the high water density  region at  . The rate constant for decomposition of IPP was correlated with a global reaction model for a range of temperatures from 613 to  . |
| Keywords: | Supercritical fluid Reaction engineering Fuel Environment Supercritical water Phenol |
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