Articles online

Catalytic Decomposition of PCDD/Fs over Nano-TiO2 Based V2O5/CeO2 Catalyst at Low Temperature

Category: Control Techniques and Strategy

Volume: 16 | Issue: 8 | Pages: 2011-2022
DOI: 10.4209/aaqr.2016.05.0205
PDF | RIS | BibTeX

Ming-Feng Yu, Xiao-Qing Lin , Xiao-Dong Li, Tong Chen, Jian-Hua Yan

  • State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China


Nano-TiO2 based V2O5/CeO2 catalyst is developed for PCDD/Fs destruction at 180°C.
Effects of oxygen, water vapour and SO2 on PCDD/Fs destruction are studied.
Catalyst regeneration is investigated at 180°C in the presence of oxygen.


Catalytic decomposition of PCDD/Fs (Polychlorinated dibenzo-p-dioxins and furans) over nano-TiO2 based V2O5/CeO2 catalyst is investigated at 180°C based on a stable PCDD/Fs generating system. Step impregnation method is used to prepare the powder catalyst, and catalyst characterization is conducted by XRD and TPR. Effects of oxygen, water vapour and sulphur dioxide on PCDD/Fs destruction are studied in terms of destruction efficiency. Oxygen plays a positive role on PCDD/Fs destruction by accelerating the conversion of V4+Ox and V5+Ox, Ce3+Ox and Ce4+Ox. The destruction efficiencies of PCDD/Fs increase from 67.6% to 77.8% with oxygen contents increasing from 11 vol.% to 21 vol.%. In the absence of oxygen, PCDD/Fs can still be destroyed with destruction efficiency of 33.7% due to the lattice oxygen atoms stored by V2O5 and CeO2. Water vapour negatively affects the destruction of PCDD/Fs by competitive adsorption. On the other hand, negative destruction efficiencies of TCDD and TCDF are observed in the presence of water, and the values become lower with water vapour contents increasing. This result demonstrates water vapour facilitates the removal of Cl- present on the catalyst surface. SO2 inhibits the activity of catalyst by poisoning active sites of catalyst. With SO2 concentration increasing from 0 to 100 ppm, destruction efficiencies of PCDD/Fs significantly decrease from 67.6% to 51.9%. Finally, catalyst regeneration is also investigated at 180°C in the presence of oxygen. Most of PCDD/Fs residues in the catalyst will be destroyed, and catalyst is regenerated without PCDD/Fs contaminated.


PCDD/Fs V2O5-CeO2/TiO2 catalyst Oxygen Water vapour SO2

Related Article

Spatio-Temporal Analyses of Atmospheric Sulfur Dioxide Column Densities over Pakistan by Using SCIAMACHY Data

Palwasha Khattak, Muhammad Fahim Khokhar , Naila Yasmin
Volume: 14 | Issue: 7 | Pages: 1883-1896
DOI: 10.4209/aaqr.2013.12.0357

Trans-Boundary Volcanic SO2 Detected over Pakistan from Satellite Observations during the Time Period 2004–2012

Palwasha Khattak, Muhammad Fahim Khokhar , Saud Ahmed Khan
Volume: 14 | Issue: 6 | Pages: 1543-1557
DOI: 10.4209/aaqr.2013.12.0361

Improved Photocatalytic Air Cleaner with Decomposition of Aldehyde and Aerosol-Associated Influenza Virus Infectivity in Indoor Air

Kimiyasu Shiraki , Hiroshi Yamada, Yoshihiro Yoshida, Ayumu Ohno, Teruo Watanabe, Takafumi Watanabe, Hiroyuki Watanabe, Hidemitsu Watanabe, Masao Yamaguchi, Fumio Tokuoka, Shigeatsu Hashimoto, Masakazu Kawamura, Norihisa Adachi
Volume: 17 | Issue: 11 | Pages: 2901-2912
DOI: 10.4209/aaqr.2017.06.0220

High Selectivity of Visible-Light-Driven La-doped TiO2 Photocatalysts for NO Removal

Yu Huang, Jun-Ji Cao, Fei Kang, Sheng-Jie You, Chia-Wei Chang, Ya-Fen Wang
Volume: 17 | Issue: 10 | Pages: 2555-2565
DOI: 10.4209/aaqr.2017.08.0282