High‐Performance Ceramic Catalyst Filters with Textured Waveguides for Efficient Removal of Volatile Organic Compounds

Author:

Kim Jawon1ORCID,Park Jeonghyeon1,Koo Min Seok2,Cho Won Seok1,Moon Seokho1,Hwang Inyong1,Kim Jaerim1,Park Jae Yong3,Ham Dong Jin2,Lee Hyun Chul2ORCID,Kim Jong Kyu1ORCID

Affiliation:

1. Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Nam‐gu Pohang 37673 Republic of Korea

2. Air Science Research Center (ASRC) Samsung Advanced Institute of Technology (SAIT) Samsung Electronics Co., Ltd. 130 Samsung‐ro, Yeongtong‐gu Suwon‐si Gyeonggi‐do 16678 Republic of Korea

3. Department of Chemistry University of Wisconsin-Madison Madison WI 53706 United States

Abstract

AbstractThe cordierite‐based ceramic catalyst filter (CCF) has attracted considerable attention as a promising future air purification system due to its ability to filtrate particulate matter (PM), as well as decompose volatile organic compounds (VOCs) through ultraviolet (UV)‐activated photocatalytic reactions. Its performance, however, is strictly limited because majority of UV photons are absorbed near the entrance of the high‐aspect‐ratio air‐flow channels, thus, only a limited portion of photocatalysts is activated during the flow of polluted air. In this study, a high‐performance CCF is presented featuring textured waveguides (TWs) aligned with an array of UV light‐emitting diodes (LEDs) emitting at a peak wavelength of 365 nm, which are inserted into an array of high‐aspect‐ratio channels. TWs ensure the delivery of UV photons deep inside channels via total internal reflection and scattering, enabling the activation of majority of photocatalysts, resulting in remarkable improvement in VOCs removal efficiency. The proposed CCF system exhibits much higher formaldehyde (HCHO) removal efficiency by 70% compared to conventional CCF systems even subjected to much lower UV light power densities. It is strongly believed that it is possible to further improve the removal efficiency, while maintaining effective PM filtering and ultralow electrical power consumption, by optimization of the geometry of the CCF system with TWs.

Funder

National Research Foundation of Korea

Publisher

Wiley

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