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Low temperature oxidation of PCDD/Fs by TiO 2 ‐based V 2 O 5 /WO 3 catalyst
Author(s) -
Yu MingFeng,
Li XiaoDong,
Ren Yong,
Chen Tong,
Lu ShengYong,
Yan JianHua
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12339
Subject(s) - space velocity , catalysis , water vapor , chemistry , vapor phase , analytical chemistry (journal) , environmental chemistry , nuclear chemistry , organic chemistry , thermodynamics , selectivity , physics
Catalytic oxidation of vapor phase PCDD/Fs (polychlorinated dibenzo‐p‐dioxins and polychlorinated dibenzofurans) by V 2 O 5 ‐WO 3 /TiO 2 catalyst at low temperature (180°C) was studied. An innovative PCDD/Fs generating system was designed to supply stable gaseous PCDD/Fs steam with initial concentration of 5.60 ng I‐TEQ Nm −3 . The effects of Gas Hourly Space Velocity (GHSV), water vapor content and sulphur‐dioxide (SO 2 ) concentration on catalytic oxidation were investigated. The destruction efficiency (DE) reaches a maximum value of 76.4% with a GHSV value of 2000 h −1 . In the presence of water vapor, there are almost no changes for the RE values of PCDD/Fs. Water vapor negatively affects the destruction of PCDD/Fs. However, when 3 vol % of water vapor is introduced into the reaction system, even more PCDD/Fs are destroyed compared with the absence of water vapor. SO 2 can inhibit the destruction of PCDD/Fs by poisoning catalyst. With SO 2 concentration increasing from 0 to 250 ppm, DE value of PCDD/Fs significantly decreases from 68.6% to 38.8%. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1265–1273, 2016