Supercritical water oxidation of 2-chlorophenol effected by Li+ and CuO/zeolites

Catalytic oxidation of 2-chlorophenol (2CP) in supercritical water was inve stigated. Experimentally, conversion of 2CP in supercritical water oxidatio n (SCWO) process is effectively enhanced in the presence of Li+ that also r educes the formation of higher chlorinated phenols and PAHs. The global rea ction rate of SCWO of 2CP in the presence of Li+ is expressed as: 92.5 exp (-10.5/RT) [2CP](095) [O-2](0.56) [H2O](0.45). The undesired by-products in the SCWO of 2CP are also extensively reduced in the channels of zeolite ca talysts. By EXAFS spectroscopy, Cu-O and Cu-Cu are identified as the main o xidation active species in the zeolite channels. Cl-bonded CuO species in z eolite Y are not observed.