Dependence of humidified air plasma discharge performance in commercial honeycomb monoliths on the configuration and key parameters of the reactor

Shirjana Saud; Duc Ba Nguyen; Roshan Mangal Bhattarai; Nosir Matyakubov; Iljeong Heo; Sang-Joon Kim; Young Jin Kim; Jin Hee Lee; Young Sun Mok

doi:10.1016/j.jhazmat.2020.124024

Dependence of humidified air plasma discharge performance in commercial honeycomb monoliths on the configuration and key parameters of the reactor

J Hazard Mater. 2021 Feb 15;404(Pt B):124024. doi: 10.1016/j.jhazmat.2020.124024. Epub 2020 Oct 2.

Authors

Shirjana Saud¹, Duc Ba Nguyen², Roshan Mangal Bhattarai¹, Nosir Matyakubov¹, Iljeong Heo³, Sang-Joon Kim³, Young Jin Kim³, Jin Hee Lee³, Young Sun Mok⁴

Affiliations

¹ Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea.
² Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea; Institute of Research and Development, Duy Tan University, Danang 550000, Viet Nam. Electronic address: band@plasma.ac.vn.
³ Environment & Sustainable Resources Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
⁴ Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea. Electronic address: smokie@jejunu.ac.kr.

PMID: 33068988
DOI: 10.1016/j.jhazmat.2020.124024

Abstract

The effect of the reactor configuration and several key parameters such as the gas temperature, humidity, and flow rate on the corona discharge plasma in honeycomb monoliths was investigated. The AC corona discharge-based plasma reactor consisted of two parallel electrodes (perforated disk/wire-mesh) placed at both ends of the honeycomb monolith. Although the wire-mesh electrode offers increased sharpness, the perforated disk electrode, where the corona discharge started at the sharp edges of the holes, produced more discharge power because of the larger effective electrode area. Loading a small amount of metal onto the monolith was found to increase the discharge power significantly. Coating the monolith with a zeolite such as ZSM-5 (Si/Al: 23.9) led to a decrease in the discharge power because of its hydrophobic nature and large surface area. The result also revealed that the operating temperature, the humidity of the feed gas, and the gas velocity were key factors affecting the discharge performance. The discharge power was inversely proportional to the temperature. On the other hand, the use of a high-velocity feed gas with high water vapor content was found to be particularly advantageous for obtaining high discharge power.

Keywords: AC corona discharge; Gas velocity; Honeycomb monolith; Humidity; Temperature.