Development of KNaTiO3 as a novel high-temperature CO2 capturing material with fast sorption rate and high reversible sorption capacity

Qianwen Zheng; Liang Huang; Ziyi Zhong; Benoit Louis; Qiang Wang

doi:10.1016/j.cej.2019.122444

Development of KNaTiO₃ as a novel high-temperature CO₂ capturing material with fast sorption rate and high reversible sorption capacity

Qianwen Zheng, Liang Huang, Ziyi Zhong, Benoit Louis, Qiang Wang^*

^*Corresponding author for this work

Chemical Engineering

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

14 Scopus citations

Abstract

In addition to the previous well studied CaO, Li₄SiO₄, and Li₂ZrO₃, a new type of high-temperature CO₂ capture material KNaTiO₃ was revealed for the first time, which exhibited excellent sorption performance, including a superior CO₂ capture capacity and fast sorption rate under different concentrations of CO₂. By decreasing the CO₂ concentration from 100 to 20 vol%, the CO₂ uptake only slightly decreased from 19.0 to 17.4 wt%, suggesting this sorbent is very promising for practical applications. Isothermal CO₂ sorption and double exponential mode fitting demonstrated that the sorption-desorption equilibrium can be reached within 10 min, with the diffusion as the limiting step. Moreover, the good regeneration ability and prominent cycling stability of KNaTiO₃ can be observed during 20 cycles at 700 °C with a pressure swing adsorption scheme. A mechanism and reaction process were proposed. This work represents a great breakthrough in the development of new high-temperature CO₂ capturing materials.

Original language	English
Article number	122444
Journal	Chemical Engineering Journal
Volume	380
DOIs	https://doi.org/10.1016/j.cej.2019.122444
State	Published - 15 Jan 2020

Keywords

CO adsorption/desorption process
CO concentration
Global warming
KNaTiO
Sorption mechanism

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@article{569ede6a89c148599a8edd83d29c1373,

title = "Development of KNaTiO3 as a novel high-temperature CO2 capturing material with fast sorption rate and high reversible sorption capacity",

abstract = "In addition to the previous well studied CaO, Li4SiO4, and Li2ZrO3, a new type of high-temperature CO2 capture material KNaTiO3 was revealed for the first time, which exhibited excellent sorption performance, including a superior CO2 capture capacity and fast sorption rate under different concentrations of CO2. By decreasing the CO2 concentration from 100 to 20 vol%, the CO2 uptake only slightly decreased from 19.0 to 17.4 wt%, suggesting this sorbent is very promising for practical applications. Isothermal CO2 sorption and double exponential mode fitting demonstrated that the sorption-desorption equilibrium can be reached within 10 min, with the diffusion as the limiting step. Moreover, the good regeneration ability and prominent cycling stability of KNaTiO3 can be observed during 20 cycles at 700 °C with a pressure swing adsorption scheme. A mechanism and reaction process were proposed. This work represents a great breakthrough in the development of new high-temperature CO2 capturing materials.",

keywords = "CO adsorption/desorption process, CO concentration, Global warming, KNaTiO, Sorption mechanism",

author = "Qianwen Zheng and Liang Huang and Ziyi Zhong and Benoit Louis and Qiang Wang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = jan,

day = "15",

doi = "10.1016/j.cej.2019.122444",

language = "英语",

volume = "380",

journal = "Chemical Engineering Journal",

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TY - JOUR

T1 - Development of KNaTiO3 as a novel high-temperature CO2 capturing material with fast sorption rate and high reversible sorption capacity

AU - Zheng, Qianwen

AU - Huang, Liang

AU - Zhong, Ziyi

AU - Louis, Benoit

AU - Wang, Qiang

PY - 2020/1/15

Y1 - 2020/1/15

N2 - In addition to the previous well studied CaO, Li4SiO4, and Li2ZrO3, a new type of high-temperature CO2 capture material KNaTiO3 was revealed for the first time, which exhibited excellent sorption performance, including a superior CO2 capture capacity and fast sorption rate under different concentrations of CO2. By decreasing the CO2 concentration from 100 to 20 vol%, the CO2 uptake only slightly decreased from 19.0 to 17.4 wt%, suggesting this sorbent is very promising for practical applications. Isothermal CO2 sorption and double exponential mode fitting demonstrated that the sorption-desorption equilibrium can be reached within 10 min, with the diffusion as the limiting step. Moreover, the good regeneration ability and prominent cycling stability of KNaTiO3 can be observed during 20 cycles at 700 °C with a pressure swing adsorption scheme. A mechanism and reaction process were proposed. This work represents a great breakthrough in the development of new high-temperature CO2 capturing materials.

AB - In addition to the previous well studied CaO, Li4SiO4, and Li2ZrO3, a new type of high-temperature CO2 capture material KNaTiO3 was revealed for the first time, which exhibited excellent sorption performance, including a superior CO2 capture capacity and fast sorption rate under different concentrations of CO2. By decreasing the CO2 concentration from 100 to 20 vol%, the CO2 uptake only slightly decreased from 19.0 to 17.4 wt%, suggesting this sorbent is very promising for practical applications. Isothermal CO2 sorption and double exponential mode fitting demonstrated that the sorption-desorption equilibrium can be reached within 10 min, with the diffusion as the limiting step. Moreover, the good regeneration ability and prominent cycling stability of KNaTiO3 can be observed during 20 cycles at 700 °C with a pressure swing adsorption scheme. A mechanism and reaction process were proposed. This work represents a great breakthrough in the development of new high-temperature CO2 capturing materials.

KW - CO adsorption/desorption process

KW - CO concentration

KW - Global warming

KW - KNaTiO

KW - Sorption mechanism

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U2 - 10.1016/j.cej.2019.122444

DO - 10.1016/j.cej.2019.122444

M3 - 文章

AN - SCOPUS:85070271672

SN - 1385-8947

VL - 380

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 122444

ER -

Development of KNaTiO₃ as a novel high-temperature CO₂ capturing material with fast sorption rate and high reversible sorption capacity

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Keywords

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