Removal of ethyl acetate in air by using different types of corona discharges generated in a honeycomb monolith structure coated with Pd/γ-alumina

Van Toan Nguyen; Duc Ba Nguyen; Young Sun Mok; Md Mokter Hossain; Shirjana Saud; Kyeong Hwan Yoon; Duy Khoe Dinh; Seungmin Ryu; Hyeongwon Jeon; Seong Bong Kim

doi:10.1016/j.jhazmat.2021.126162

Removal of ethyl acetate in air by using different types of corona discharges generated in a honeycomb monolith structure coated with Pd/γ-alumina

J Hazard Mater. 2021 Aug 15:416:126162. doi: 10.1016/j.jhazmat.2021.126162. Epub 2021 May 21.

Authors

Affiliations

¹ Department of Chemical and Biological Engineering, Jeju National University, Jeju, Republic of Korea.
² Department of Chemical and Biological Engineering, Jeju National University, Jeju, Republic of Korea. Electronic address: smokie@jejunu.ac.kr.
³ Department of Industrial Plasma Engineering, Korea Institute of Machinery and Materials, Daejeon, Republic of Korea.
⁴ Institute of Plasma Technology, Korea Institute of Fusion Energy, Jeollabuk-do 54004, Republic of Korea.

PMID: 34492940
DOI: 10.1016/j.jhazmat.2021.126162

Abstract

A method based on the corona discharge produced by high voltage alternating current (AC) and direct current (DC) over a Pd/γ-Al₂O₃ catalyst supported on a honeycomb structure monolith was developed to eliminate ethyl acetate (EA) from the air at atmospheric pressure. The characteristics of the AC and DC corona discharge generated inside the honeycomb structure monolith were investigated by varying the humidity, gas hourly space velocity (GHSV), and temperature. The results showed that the DC corona discharge is more stable and easily operated at different operating conditions such as humidity, GHSV, and gas temperature compared to the AC discharge. At a given applied voltage, the EA conversion in the DC honeycomb catalyst discharge is, therefore, higher compared with that in the AC honeycomb catalyst discharge (e.g., 96% of EA conversion compared with approximately 68%, respectively, at 11.2 kV). These new results can open opportunities for wide applications of DC corona discharge combined with honeycomb catalysts to VOC treatment.

Keywords: Corona discharge; Ethyl acetate removal; Honeycomb catalyst; VOCs removal.