Zinc-aluminum layered double hydroxide and double oxide for room-temperature oxidation of sulfur dioxide gas

Nishesh Kumar Gupta; Carolina Leyva; Herlys Viltres; Rushikesh P Dhavale; Kwang Soo Kim; Adolfo Romero-Galarza; Hyung-Ho Park

doi:10.1016/j.chemosphere.2023.139503

Zinc-aluminum layered double hydroxide and double oxide for room-temperature oxidation of sulfur dioxide gas

Chemosphere. 2023 Oct:338:139503. doi: 10.1016/j.chemosphere.2023.139503. Epub 2023 Jul 13.

Authors

Nishesh Kumar Gupta¹, Carolina Leyva², Herlys Viltres³, Rushikesh P Dhavale⁴, Kwang Soo Kim⁵, Adolfo Romero-Galarza⁶, Hyung-Ho Park⁴

Affiliations

¹ Department of Environmental Research, University of Science and Technology (UST), Daejeon 34113, South Korea; Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, 10223, South Korea.
² Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria.694, Col. Irrigación Miguel Hidalgo, Mexico City, CDMX, 11500, Mexico. Electronic address: zleyva@ipn.mx.
³ School of Engineering Practice and Technology, McMaster University, 1280 Main Street West Hamilton, Ontario, L8S 4L8, Canada.
⁴ Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul, 03722, South Korea.
⁵ Department of Environmental Research, University of Science and Technology (UST), Daejeon 34113, South Korea; Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, 10223, South Korea. Electronic address: kskim@kict.re.kr.
⁶ Departamento de Ingeniería Química, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Blvd. V. Carranza e Ing. José Cárdenas V. S/N, 25280, Saltillo, COAH, Mexico.

PMID: 37453522
DOI: 10.1016/j.chemosphere.2023.139503

Abstract

Sulfur dioxide (SO₂) gas at trace levels challenges the consumption of fuel gases and cleaning of flue gases originating from diverse anthropogenic sources. We have demonstrated Zn-Al layered double hydroxide (LDH) and layered double oxide (LDO) as low-cost and effective adsorbents in removing lowly concentrated SO₂ gas at room temperature. Water in the adsorbent bed significantly improved the performance, where the maximum adsorption capacity of 38.0 mg g^-1 was achieved for LDO. Based on the spectroscopic findings, the adsorbed gas molecules were oxidized to surface-bound sulfate/bisulfate species, showing complete mineralization of SO₂ molecules. By employing an inexpensive NaOH-H₂O₂ solution-based regeneration strategy, we successfully regenerated the spent LDO, significantly restoring its gas uptake capacity. The regenerated oxide exhibited an increased gas uptake capacity ranging from 38.0 to 98.5 mg g^-1, highlighting the practicality and economic feasibility of our approach. LDH/LDO materials are promising regenerable adsorbents for removing low concentrations of SO₂ gas in ambient conditions.

Keywords: Double oxide; Layered double hydroxide; Mechanism; Regeneration; Sulfur dioxide.

MeSH terms

Acids
Adsorption
Aluminum Hydroxide
Aluminum* / chemistry
Hydrogen Peroxide
Hydroxides
Oxides
Sulfur Dioxide* / chemistry
Temperature
Zinc

Substances

Sulfur Dioxide
Aluminum
Oxides
Aluminum Hydroxide
Zinc
Hydrogen Peroxide
hydroxide ion
zinc hydroxide
Hydroxides
Acids