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Effect of hydrogen peroxide on Dagang vacuum residue oxidation depolymerization assisted with photo-catalytic
XIE Hengshen1,2, ZONG Zhimin2, CHEN Hengbao2, WEI Xianyong2
(1.Division of Science & Technology in Jiangsu Institute of Architectural Technology, Xuzhou 221116, China;2.School of Chemical Engineering & Technology in China University of Mining and Technology, Xuzhou 221008, China)
Abstract:
The Dagang vacuum residue (DVR) was oxidized by hydrogen peroxide assisted with photo-catalytic. And the oxidation efficiency was analyzed through gas chromatography-mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FTIR). The results indicate that hydrogen peroxide plays an important role of promoting the photo-catalytic oxidation process. And about 70% of the alkane in DVR is gradually converted into some strong polar and easily separated oxygenated compounds, and its relative content reaches 92.94% in DVR. The compounds mainly include 36.05% organic carboxylic acids, 14.56% organic esters, and 9.05% other chain oxygenated compounds (ether, ketone, and phenol products etc.). The heterocyclic compounds reaches 21.57%, of which five-membered cyclic ether compounds (furan) accounts for 19.12%. And the long chain hydrocarbons can be depolymerized through reduced carbon chain unit number. And the amounts of hydrogen peroxide, catalyst and heavy oil, as well as the different solvents have all influences on hydrogen peroxide oxidation.
Key words:  Dagang vacuum residue  photo-catalytic oxidation  hydrogen peroxide  gas chromatography-mass spectrometry