Conversion of Dagang vacuum residue into oxygen-containing organic compounds by photo-oxidation with H2O2 over TiO 2

Abstract

The photocatalytic depolymerization of Dagang vacuum residue (DVR) was carried out with H2O2 over TiO2 in a photochemical reactor. Most of the organic matter in DVR was converted into oxygen-containing organic compounds. The yields of carboxylic acids, oxalates, epoxy compounds, and hydroxyl compounds from DVR oxidation are 40.6, 36.4, 17.86, and 13.5, respectively. In addition, the oxidation causes significant decrease in viscosity and chromaticity of DVR. The related reaction mechanisms are discussed according to the experimental results. © 2011 Heng-Shen Xie et al.