Porous Ceramics Adsorbents Based on Glass Fiber-Reinforced Plastics for NOx and SOx Removal

Hiroyuki Kinoshita; Kentaro Yasui; Taichi Hamasuna; Toshifumi Yuji; Naoaki Misawa; Tomohiro Haraguchi; Koya Sasaki; Narong Mungkung

doi:10.3390/polym14010164

Porous Ceramics Adsorbents Based on Glass Fiber-Reinforced Plastics for NO_x and SO_x Removal

Polymers (Basel). 2021 Dec 31;14(1):164. doi: 10.3390/polym14010164.

Authors

Hiroyuki Kinoshita¹, Kentaro Yasui², Taichi Hamasuna³, Toshifumi Yuji⁴, Naoaki Misawa⁵, Tomohiro Haraguchi¹, Koya Sasaki⁶, Narong Mungkung⁷

Affiliations

¹ Department of Engineering, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki 889-2192, Japan.
² National Institute of Technology, Kagoshima College, 1460-1 Hayatochoshinko, Kirishima City 899-5193, Kagoshima Prefecture, Japan.
³ Graduate School of Engineering, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki 889-2192, Japan.
⁴ Faculty of Education, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki 889-2192, Japan.
⁵ Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki 889-2192, Japan.
⁶ Suzuki Motor Corporation, 300 Takatsuka-cho, Minami-ku, Hamamatsu City 432-8611, Shizuoka Prefecture, Japan.
⁷ Department of Electrical Technology Education, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand.

Abstract

To reuse waste glass fiber-reinforced plastics (GFRPs), porous ceramics (i.e., GFRP/clay ceramics) were produced by mixing crushed GFRP with clay followed by firing the resulting mixture under different conditions. The possibility of using ceramics fired under a reducing atmosphere as adsorbent materials to remove NO_x and SO_x from combustion gases of fossil fuels was investigated because of the high porosity, specific surface area, and contents of glass fibers and plastic carbides of the ceramics. NO₂ and SO₂ adsorption tests were conducted on several types of GFRP/clay ceramic samples, and the gas concentration reduction rates were compared to those of a clay ceramic and a volcanic pumice with high NO₂ adsorption. In addition, to clarify the primary factor affecting gas adsorption, adsorption tests were conducted on the glass fibers in the GFRP and GFRP carbides. The reductively fired GFRP/clay ceramics exhibited high adsorption performance for both NO₂ and SO₂. The primary factor affecting the NO₂ adsorption of the ceramics was the plastic carbide content in the clay structure, while that affecting the SO₂ adsorption of the ceramics was the glass fiber content.

Keywords: NO2 adsorption performance; SO2 adsorption performance; adsorbent; ceramics; reuse; waste GFRP.