Influence of CO2 gas on the rate and kinetics of HCl, SO2, and NO2 gas removal by Mg-Al layered double hydroxide intercalated with CO32−

Tomohito Kameda; Hiroki Uchida; Shogo Kumagai; Yuko Saito; Keiichi Mizushina; Ichirou Itou; Tianye Han; Toshiaki Yoshioka

doi:10.1016/j.clay.2020.105725

Influence of CO₂ gas on the rate and kinetics of HCl, SO₂, and NO₂ gas removal by Mg-Al layered double hydroxide intercalated with CO₃²⁻

Tomohito Kameda, Hiroki Uchida, Shogo Kumagai, Yuko Saito, Keiichi Mizushina, Ichirou Itou, Tianye Han, Toshiaki Yoshioka

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

10 Citations (Scopus)

Abstract

This study investigates the influence of CO₂ gas on the treatment of single acidic gases (HCl, SO₂, and NO₂) using Mg[sbnd]Al layered double hydroxide intercalated with CO₃²⁻ (CO₃·Mg-Al LDH) as the adsorbent. The gas-removal kinetics is analyzed, and the reaction mechanisms are discussed. The coexisting CO₂ gas decreased the removal rate of all three acidic gases. This is likely due to the exchange reaction between intercalated CO₃²⁻ and gas-phase CO₂, which inhibits the exchange between intercalated CO₃²⁻ and HCl, SO₂, or NO₂. The HCl removal by CO₃·Mg-Al LDH follows pseudo first order kinetics, suggesting that the main removal mechanism is chemisorption (chemical reaction between CO₃·Mg-Al LDH and HCl). Meanwhile, the removal of SO₂ and NO₂ by CO₃·Mg-Al LDH also follows pseudo first order kinetics. However, the corresponding adsorption mechanisms are classified as physisorption onto the Mg[sbnd]Al LDH.

Original language	English
Article number	105725
Journal	Applied Clay Science
Volume	195
DOIs	https://doi.org/10.1016/j.clay.2020.105725
Publication status	Published - 2020 Sept 15

Keywords

Acidic gases
Adsorption
CO
CO·Mg-Al layered double hydroxide
Gas removal
Gas-removal kinetics

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10.1016/j.clay.2020.105725

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title = "Influence of CO2 gas on the rate and kinetics of HCl, SO2, and NO2 gas removal by Mg-Al layered double hydroxide intercalated with CO32−",

abstract = "This study investigates the influence of CO2 gas on the treatment of single acidic gases (HCl, SO2, and NO2) using Mg[sbnd]Al layered double hydroxide intercalated with CO32− (CO3·Mg-Al LDH) as the adsorbent. The gas-removal kinetics is analyzed, and the reaction mechanisms are discussed. The coexisting CO2 gas decreased the removal rate of all three acidic gases. This is likely due to the exchange reaction between intercalated CO32− and gas-phase CO2, which inhibits the exchange between intercalated CO32− and HCl, SO2, or NO2. The HCl removal by CO3·Mg-Al LDH follows pseudo first order kinetics, suggesting that the main removal mechanism is chemisorption (chemical reaction between CO3·Mg-Al LDH and HCl). Meanwhile, the removal of SO2 and NO2 by CO3·Mg-Al LDH also follows pseudo first order kinetics. However, the corresponding adsorption mechanisms are classified as physisorption onto the Mg[sbnd]Al LDH.",

keywords = "Acidic gases, Adsorption, CO, CO·Mg-Al layered double hydroxide, Gas removal, Gas-removal kinetics",

author = "Tomohito Kameda and Hiroki Uchida and Shogo Kumagai and Yuko Saito and Keiichi Mizushina and Ichirou Itou and Tianye Han and Toshiaki Yoshioka",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = sep,

day = "15",

doi = "10.1016/j.clay.2020.105725",

language = "English",

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journal = "Applied Clay Science",

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TY - JOUR

T1 - Influence of CO2 gas on the rate and kinetics of HCl, SO2, and NO2 gas removal by Mg-Al layered double hydroxide intercalated with CO32−

AU - Kameda, Tomohito

AU - Uchida, Hiroki

AU - Kumagai, Shogo

AU - Saito, Yuko

AU - Mizushina, Keiichi

AU - Itou, Ichirou

AU - Han, Tianye

AU - Yoshioka, Toshiaki

PY - 2020/9/15

Y1 - 2020/9/15

N2 - This study investigates the influence of CO2 gas on the treatment of single acidic gases (HCl, SO2, and NO2) using Mg[sbnd]Al layered double hydroxide intercalated with CO32− (CO3·Mg-Al LDH) as the adsorbent. The gas-removal kinetics is analyzed, and the reaction mechanisms are discussed. The coexisting CO2 gas decreased the removal rate of all three acidic gases. This is likely due to the exchange reaction between intercalated CO32− and gas-phase CO2, which inhibits the exchange between intercalated CO32− and HCl, SO2, or NO2. The HCl removal by CO3·Mg-Al LDH follows pseudo first order kinetics, suggesting that the main removal mechanism is chemisorption (chemical reaction between CO3·Mg-Al LDH and HCl). Meanwhile, the removal of SO2 and NO2 by CO3·Mg-Al LDH also follows pseudo first order kinetics. However, the corresponding adsorption mechanisms are classified as physisorption onto the Mg[sbnd]Al LDH.

AB - This study investigates the influence of CO2 gas on the treatment of single acidic gases (HCl, SO2, and NO2) using Mg[sbnd]Al layered double hydroxide intercalated with CO32− (CO3·Mg-Al LDH) as the adsorbent. The gas-removal kinetics is analyzed, and the reaction mechanisms are discussed. The coexisting CO2 gas decreased the removal rate of all three acidic gases. This is likely due to the exchange reaction between intercalated CO32− and gas-phase CO2, which inhibits the exchange between intercalated CO32− and HCl, SO2, or NO2. The HCl removal by CO3·Mg-Al LDH follows pseudo first order kinetics, suggesting that the main removal mechanism is chemisorption (chemical reaction between CO3·Mg-Al LDH and HCl). Meanwhile, the removal of SO2 and NO2 by CO3·Mg-Al LDH also follows pseudo first order kinetics. However, the corresponding adsorption mechanisms are classified as physisorption onto the Mg[sbnd]Al LDH.

KW - Acidic gases

KW - Adsorption

KW - CO

KW - CO·Mg-Al layered double hydroxide

KW - Gas removal

KW - Gas-removal kinetics

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Influence of CO₂ gas on the rate and kinetics of HCl, SO₂, and NO₂ gas removal by Mg-Al layered double hydroxide intercalated with CO₃²⁻

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