标题：Supercritical water oxidation of N-phenylglycinonitrile wastewater
作者：J.M. Zhang;C.Y. Ma;F.M. Zhang;G.F. Chen
作者机构：School of Environmental Science and Engineering, Shandong University, Jinan, China,National Engineering Laboratory for Reducing
来源：Desalination and water treatment: Science and engineering
关键词：N-phenylglycinonitrile;Chemical oxygen demand (COD);Supercritical water oxidation (SCWO);Pseudo-first-order global rate
摘要：N-phenylglycinonitrile wastewater was treated with supercritical water oxidation (SCWO), at temperatures ranging from 375 to 550 ℃, a pressure of 25 MPa, residence times ranging from 5 to 60 s, and initial reactant concentrations ranging from 2,400 to 24,400 mg O_2/L in terms of chemical oxygen demand (COD). Results showed that when the initial COD of the wastewater was low and the oxidant was abundant, the temperature and residence time had significant effect on COD removal, while the initial COD concentration and oxidant dose did not show significant effects. A global rate expression was regressed from the complete set of data. An assumed pseudo-first-order global rate expression was determined with activation energy of 52.9(±2.9) kJ mol~(-1) and a preexponential factor of 3.6(±1.4) × 10~2s~(-1).