Partial oxidative gasification of phenol for hydrogen in supercritical water
The paper reports partial oxidative gasification of phenol for hydrogen in supercritical water (SCW) at lower temperature (<753Â K), at which cleavages of aromatic ring occur difficultly and tend to undesirable polymerization. The results showed that O2 is effective to gasification of phenol in SCW. ~76% of phenol was gasified and 2.7Â mol/mol of hydrogen was produced within 180Â s with Na2CO3 as catalyst at the selected process conditions, a molar ratio of oxygen-to-phenol, 7.5-1, 723Â K, and 24Â MPa. It was found that unstable opening-rings products oxalic and maleic acid and stable dimmerization compounds in liquid water were formed during partial oxidation process. The process also indicated phenol was rapidly converted, and some opening-rings products were slowly gasified, which also confirmed oxygen served as effective reactant for ring-opening. Based on the given reaction conditions, a treatment process using a real wastewater from coking industry was performed. The data showed that the present technology provides an effective way to gasification of phenol wastewater for high-value energy utilization.
Year of publication: |
2011
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Authors: | Guan, Qingqing ; Wei, Chaohai ; Shi, Huashun ; Wu, Chaofei ; Chai, Xin-Sheng |
Published in: |
Applied Energy. - Elsevier, ISSN 0306-2619. - Vol. 88.2011, 8, p. 2612-2616
|
Publisher: |
Elsevier |
Keywords: | Phenol Partial oxidation Supercritical water Hydrogen |
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