Effect of pH-controlled synthesis on the physical properties and intermediate-temperature CO2 sorption behaviors of K-Mg double salt-based sorbents

Chan Hyun Lee; Hyuk Jae Kwon; Hyun Chul Lee; Soonchul Kwon; Sang Goo Jeon; Ki Bong Lee

doi:10.1016/j.cej.2016.03.003

Effect of pH-controlled synthesis on the physical properties and intermediate-temperature CO₂ sorption behaviors of K-Mg double salt-based sorbents

Chan Hyun Lee, Hyuk Jae Kwon, Hyun Chul Lee, Soonchul Kwon, Sang Goo Jeon, Ki Bong Lee

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

38 Citations (Scopus)

Abstract

High-temperature CO₂ sorption has been investigated as a new CO₂ capture technology, and the development of high-temperature CO₂ sorbents is critically important for the realization of this technology. In this study, K-Mg double salt-based sorbents were synthesized using a new pH-controlled precipitation method and the prepared sorbents were tested for medium high (intermediate) temperature CO₂ sorption. In the new method for the synthesis of K-Mg double salt-based sorbents, the pH of the reagent solution was controlled by adding K₂CO₃ and/or KOH, resulting in varied ratios of different components in the sorbent. The CO₂ sorption ability was enhanced in K-Mg double salt-based sorbents synthesized using the new pH-controlled method compared to the samples synthesized by the conventional precipitation method. The newly prepared K-Mg double salt-based sorbents had a high CO₂ sorption uptake of up to 2.09 mol kg^-1 at 300 °C and 1 bar. In addition, they showed fast sorption kinetics and good cyclic stability during multiple sorption/desorption procedures.

Original language	English
Pages (from-to)	439-446
Number of pages	8
Journal	Chemical Engineering Journal
Volume	294
DOIs	https://doi.org/10.1016/j.cej.2016.03.003
Publication status	Published - 2016 Jun 15

Bibliographical note

Funding Information:
This research was supported by the Samsung Advanced Institute of Technology, Samsung Electronics. Co. Ltd., and the New & Renewable Energy Core Technology Program (20153030041170) and the Human Resources Development Program (20134010200600) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government’s Ministry of Trade, Industry and Energy . The authors also acknowledge the Korea Research Council of Fundamental Science and Technology (KRCF) for additional support through the National Agenda Program (NAP).

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Double salt-based sorbent
Intermediate-temperature CO
PH-controlled precipitation synthesis
Sorption

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2016.03.003

Cite this

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title = "Effect of pH-controlled synthesis on the physical properties and intermediate-temperature CO2 sorption behaviors of K-Mg double salt-based sorbents",

abstract = "High-temperature CO2 sorption has been investigated as a new CO2 capture technology, and the development of high-temperature CO2 sorbents is critically important for the realization of this technology. In this study, K-Mg double salt-based sorbents were synthesized using a new pH-controlled precipitation method and the prepared sorbents were tested for medium high (intermediate) temperature CO2 sorption. In the new method for the synthesis of K-Mg double salt-based sorbents, the pH of the reagent solution was controlled by adding K2CO3 and/or KOH, resulting in varied ratios of different components in the sorbent. The CO2 sorption ability was enhanced in K-Mg double salt-based sorbents synthesized using the new pH-controlled method compared to the samples synthesized by the conventional precipitation method. The newly prepared K-Mg double salt-based sorbents had a high CO2 sorption uptake of up to 2.09 mol kg-1 at 300 °C and 1 bar. In addition, they showed fast sorption kinetics and good cyclic stability during multiple sorption/desorption procedures.",

keywords = "Double salt-based sorbent, Intermediate-temperature CO, PH-controlled precipitation synthesis, Sorption",

author = "Lee, {Chan Hyun} and Kwon, {Hyuk Jae} and Lee, {Hyun Chul} and Soonchul Kwon and Jeon, {Sang Goo} and Lee, {Ki Bong}",

note = "Funding Information: This research was supported by the Samsung Advanced Institute of Technology, Samsung Electronics. Co. Ltd., and the New & Renewable Energy Core Technology Program (20153030041170) and the Human Resources Development Program (20134010200600) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government{\textquoteright}s Ministry of Trade, Industry and Energy . The authors also acknowledge the Korea Research Council of Fundamental Science and Technology (KRCF) for additional support through the National Agenda Program (NAP). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

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AU - Kwon, Soonchul

AU - Jeon, Sang Goo

AU - Lee, Ki Bong

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PY - 2016/6/15

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N2 - High-temperature CO2 sorption has been investigated as a new CO2 capture technology, and the development of high-temperature CO2 sorbents is critically important for the realization of this technology. In this study, K-Mg double salt-based sorbents were synthesized using a new pH-controlled precipitation method and the prepared sorbents were tested for medium high (intermediate) temperature CO2 sorption. In the new method for the synthesis of K-Mg double salt-based sorbents, the pH of the reagent solution was controlled by adding K2CO3 and/or KOH, resulting in varied ratios of different components in the sorbent. The CO2 sorption ability was enhanced in K-Mg double salt-based sorbents synthesized using the new pH-controlled method compared to the samples synthesized by the conventional precipitation method. The newly prepared K-Mg double salt-based sorbents had a high CO2 sorption uptake of up to 2.09 mol kg-1 at 300 °C and 1 bar. In addition, they showed fast sorption kinetics and good cyclic stability during multiple sorption/desorption procedures.

AB - High-temperature CO2 sorption has been investigated as a new CO2 capture technology, and the development of high-temperature CO2 sorbents is critically important for the realization of this technology. In this study, K-Mg double salt-based sorbents were synthesized using a new pH-controlled precipitation method and the prepared sorbents were tested for medium high (intermediate) temperature CO2 sorption. In the new method for the synthesis of K-Mg double salt-based sorbents, the pH of the reagent solution was controlled by adding K2CO3 and/or KOH, resulting in varied ratios of different components in the sorbent. The CO2 sorption ability was enhanced in K-Mg double salt-based sorbents synthesized using the new pH-controlled method compared to the samples synthesized by the conventional precipitation method. The newly prepared K-Mg double salt-based sorbents had a high CO2 sorption uptake of up to 2.09 mol kg-1 at 300 °C and 1 bar. In addition, they showed fast sorption kinetics and good cyclic stability during multiple sorption/desorption procedures.

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