Mg−Al layered double hydroxide intercalated with CO3                             2– and its recyclability for treatment of SO2

Tomohito Kameda; Masahito Tochinai; Shogo Kumagai; Toshiaki Yoshioka

doi:10.1016/j.clay.2019.105349

Mg−Al layered double hydroxide intercalated with CO₃ ^2– and its recyclability for treatment of SO₂

Tomohito Kameda, Masahito Tochinai, Shogo Kumagai, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Mg − Al layered double hydroxide intercalated with CO₃ ^2– (CO₃·Mg − Al LDH) was successfully used to remove SO₂ from a gas mixture at 140, 170, and 200 °C. The removal of SO₂ with CO₃·Mg − Al LDH occurred via surface adsorption of SO₂ and anion exchange between CO₃ ^2– in the interlayer of Mg − Al LDH and SO₂ from the gas mixture. The removal of SO₂ followed the order of Ca(OH)₂ > CO₃·Mg − Al LDH (Mg/Al = 2) > CO₃·Mg − Al LDH (Mg/Al = 4). The removal of SO₂ also followed the order of CO₃·Mg − Al LDH > Mg(OH)₂ > SO₄·Mg − Al LDH. CO₃·Mg − Al LDH was regenerated from SO₄·Mg-Al LDH using a Na₂CO₃ solution through anion exchange between SO₄ ²⁻ and CO₃ ²⁻, leading to its recyclability for removal of SO₂ from a gas mixture three times, demonstrating the feasibility of recycling the material.

Original language	English
Article number	105349
Journal	Applied Clay Science
Volume	183
DOIs	https://doi.org/10.1016/j.clay.2019.105349
Publication status	Published - 2019 Dec 15

Keywords

CO·Mg − Al layered double hydroxide
Recycling
SO

ASJC Scopus subject areas

Geology
Geochemistry and Petrology

Access to Document

10.1016/j.clay.2019.105349

Cite this

@article{edf682912b474189a5916bf68d62e42c,

title = "Mg−Al layered double hydroxide intercalated with CO3 2– and its recyclability for treatment of SO2 ",

abstract = "Mg − Al layered double hydroxide intercalated with CO3 2– (CO3·Mg − Al LDH) was successfully used to remove SO2 from a gas mixture at 140, 170, and 200 °C. The removal of SO2 with CO3·Mg − Al LDH occurred via surface adsorption of SO2 and anion exchange between CO3 2– in the interlayer of Mg − Al LDH and SO2 from the gas mixture. The removal of SO2 followed the order of Ca(OH)2 > CO3·Mg − Al LDH (Mg/Al = 2) > CO3·Mg − Al LDH (Mg/Al = 4). The removal of SO2 also followed the order of CO3·Mg − Al LDH > Mg(OH)2 > SO4·Mg − Al LDH. CO3·Mg − Al LDH was regenerated from SO4·Mg-Al LDH using a Na2CO3 solution through anion exchange between SO4 2− and CO3 2−, leading to its recyclability for removal of SO2 from a gas mixture three times, demonstrating the feasibility of recycling the material.",

keywords = "CO·Mg − Al layered double hydroxide, Recycling, SO",

author = "Tomohito Kameda and Masahito Tochinai and Shogo Kumagai and Toshiaki Yoshioka",

note = "Funding Information: This research was supported by the Environment Research and Technology Development Fund (3K163007) of the Ministry of the Environment, Japan. Funding Information: This research was supported by the Environment Research and Technology Development Fund ( 3K163007 ) of the Ministry of the Environment , Japan. Appendix A Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = dec,

day = "15",

doi = "10.1016/j.clay.2019.105349",

language = "English",

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T1 - Mg−Al layered double hydroxide intercalated with CO3 2– and its recyclability for treatment of SO2

AU - Kameda, Tomohito

AU - Tochinai, Masahito

AU - Kumagai, Shogo

AU - Yoshioka, Toshiaki

N1 - Funding Information: This research was supported by the Environment Research and Technology Development Fund (3K163007) of the Ministry of the Environment, Japan. Funding Information: This research was supported by the Environment Research and Technology Development Fund ( 3K163007 ) of the Ministry of the Environment , Japan. Appendix A Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/12/15

Y1 - 2019/12/15

N2 - Mg − Al layered double hydroxide intercalated with CO3 2– (CO3·Mg − Al LDH) was successfully used to remove SO2 from a gas mixture at 140, 170, and 200 °C. The removal of SO2 with CO3·Mg − Al LDH occurred via surface adsorption of SO2 and anion exchange between CO3 2– in the interlayer of Mg − Al LDH and SO2 from the gas mixture. The removal of SO2 followed the order of Ca(OH)2 > CO3·Mg − Al LDH (Mg/Al = 2) > CO3·Mg − Al LDH (Mg/Al = 4). The removal of SO2 also followed the order of CO3·Mg − Al LDH > Mg(OH)2 > SO4·Mg − Al LDH. CO3·Mg − Al LDH was regenerated from SO4·Mg-Al LDH using a Na2CO3 solution through anion exchange between SO4 2− and CO3 2−, leading to its recyclability for removal of SO2 from a gas mixture three times, demonstrating the feasibility of recycling the material.

AB - Mg − Al layered double hydroxide intercalated with CO3 2– (CO3·Mg − Al LDH) was successfully used to remove SO2 from a gas mixture at 140, 170, and 200 °C. The removal of SO2 with CO3·Mg − Al LDH occurred via surface adsorption of SO2 and anion exchange between CO3 2– in the interlayer of Mg − Al LDH and SO2 from the gas mixture. The removal of SO2 followed the order of Ca(OH)2 > CO3·Mg − Al LDH (Mg/Al = 2) > CO3·Mg − Al LDH (Mg/Al = 4). The removal of SO2 also followed the order of CO3·Mg − Al LDH > Mg(OH)2 > SO4·Mg − Al LDH. CO3·Mg − Al LDH was regenerated from SO4·Mg-Al LDH using a Na2CO3 solution through anion exchange between SO4 2− and CO3 2−, leading to its recyclability for removal of SO2 from a gas mixture three times, demonstrating the feasibility of recycling the material.

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KW - Recycling

KW - SO

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