Rapid determination of products of phenol hydrogenation in a supercritical water system using headspace gas chromatography |
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| Authors: | Qing-Qing Guan Xiao-Dian Huang Yan-Hua Zeng Chao-Hai Wei Ping Ning Gu Jun-Jie Xin-Sheng Chai |
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| Affiliation: | 1.Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming,China;2.The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education, South China University of Technology,Guangzhou,China;3.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou,China |
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| Abstract: | This paper reports a headspace analysis technique for the determination of products, i.e., cyclohexanone (CE) and cyclohexanol (CL), of phenol hydrogenation in a supercritical water reaction system (SWRS) with water removal by hydrate formation. An addition of anhydrous calcium chloride leads to water absorption resulting in crystal water; thus, the samples can be quantitatively measured without the influence of water. After achieving equilibrium at 150°C and maintaining it for 5 min, the obtained results showed a relative standard deviation of less than 5.3% and the recovery ranged from 93% to 104%. The presented method is simple and accurate for the analysis of CL, CE and phenol in samples from phenol conversion in SWRS. |
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