Wet scrubber coupled with heterogeneous UV/Fenton for enhanced VOCs oxidation over Fe/ZSM-5 catalyst

Ruijie Xie; Gaoyuan Liu; Dingping Liu; Shimin Liang; Dongxue Lei; Hanying Dong; Haibao Huang; Dennis Y C Leung

doi:10.1016/j.chemosphere.2019.03.160

Wet scrubber coupled with heterogeneous UV/Fenton for enhanced VOCs oxidation over Fe/ZSM-5 catalyst

Chemosphere. 2019 Jul:227:401-408. doi: 10.1016/j.chemosphere.2019.03.160. Epub 2019 Mar 29.

Authors

Ruijie Xie¹, Gaoyuan Liu², Dingping Liu³, Shimin Liang¹, Dongxue Lei¹, Hanying Dong¹, Haibao Huang⁴, Dennis Y C Leung⁵

Affiliations

¹ School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, China.
² School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China.
³ Electric Power College, South China University of Technology, Guangzhou, PR China.
⁴ School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, China. Electronic address: seabao8@gmail.com.
⁵ Department of Mechanical Engineering, The University of Hong Kong, Hong Kong.

PMID: 31003124
DOI: 10.1016/j.chemosphere.2019.03.160

Abstract

The traditional treatment processes for volatile organic compounds (VOCs) removal generally suffered several disadvantages, such as secondary air-pollutants. To overcome these issues, wet scrubber coupled with heterogeneous UV/Fenton was developed for gaseous VOCs (i.e. toluene) removal. ZSM-5 supported iron oxide (Fe/ZSM-5) was prepared as a multifunctional catalyst for activation of H₂O₂ and enhancement of gas-liquid mass transfer. Toluene was removed efficiently by this coupled process with the removal efficiency of 85% during 120 min. Many intermediates were detected in the solution by GC-MS while no intermediates were observed in the outlet gas, suggesting that wet scrubber coupled with heterogeneous UV/Fenton could significantly reduce secondary air pollutants. The possible mechanism of toluene oxidation was proposed including the physical adsorption by Fe/ZSM-5 and OH oxidation. This study provides an environmentally benign and highly efficient chemical scrubbing process for gaseous VOCs removal.

Keywords: Fe/ZSM-5; Heterogeneous UV/Fenton; Toluene oxidation; VOCs removal.

MeSH terms

Adsorption
Air Filters*
Air Pollutants / analysis
Air Pollutants / chemistry*
Catalysis
Gases
Hydrogen Peroxide / chemistry
Iron / chemistry
Oxidation-Reduction
Toluene / chemistry
Ultraviolet Rays
Volatile Organic Compounds / chemistry*

Substances

Air Pollutants
Gases
Volatile Organic Compounds
Toluene
Hydrogen Peroxide
Iron