Unravelling the Mechanism of Intermediate-Temperature CO2 Interaction with Molten-NaNO3 -Salt-Promoted MgO
© 2021 Wiley-VCH GmbH..
The optimization of MgO-based adsorbents as advanced CO2 -capture materials is predominantly focused on their molten-salt modification, for which theoretical and experimental contributions provide great insights for their high CO2 -capture performance. The underlying mechanism of the promotion effect of the molten salt on CO2 capture, however, is a topic of controversy. Herein, advanced experimental characterization techniques, including in situ environmental transmission electron microscopy (eTEM) and CO2 chemisorption by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), transient 18 O-isotopic exchange, and density functional theory (DFT), are employed to elucidate the mechanism of the CO2 interaction with molten-salt-modified MgO in the 250-400 °C range. Herein, eTEM studies using low (2-3 mbar) and high (700 mbar) CO2 pressures illustrate the dynamic evolution of the molten NaNO3 salt promoted and unpromoted MgO carbonation with high magnification (<50 nm). The formation of 18 O-NaNO3 (use of 18 O2 ) and C16 O18 O following CO2 interaction, verifies the proposed reaction path: conversion of NO3 - (NO3 - → NO2 + + O2- ), adsorption of NO2 + on MgO with significant weakening of CO2 adsorption strength, and formation of [Mg2+ … O2- ] ion pairs preventing the development of an impermeable MgCO3 shell, which largely increases the rate of bulk MgO carbonation.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2022 |
|---|---|
| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:34 |
|---|---|
| Enthalten in: |
Advanced materials (Deerfield Beach, Fla.) - 34(2022), 4 vom: 01. Jan., Seite e2106677 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Gao, Wanlin [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
CO2 capture |
|---|
| Anmerkungen: |
Date Revised 27.01.2022 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
|---|
| doi: |
10.1002/adma.202106677 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM332679896 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM332679896 | ||
| 003 | DE-627 | ||
| 005 | 20231225220046.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231225s2022 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1002/adma.202106677 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1108.xml |
| 035 | |a (DE-627)NLM332679896 | ||
| 035 | |a (NLM)34729827 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Gao, Wanlin |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Unravelling the Mechanism of Intermediate-Temperature CO2 Interaction with Molten-NaNO3 -Salt-Promoted MgO |
| 264 | 1 | |c 2022 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Revised 27.01.2022 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2021 Wiley-VCH GmbH. | ||
| 520 | |a The optimization of MgO-based adsorbents as advanced CO2 -capture materials is predominantly focused on their molten-salt modification, for which theoretical and experimental contributions provide great insights for their high CO2 -capture performance. The underlying mechanism of the promotion effect of the molten salt on CO2 capture, however, is a topic of controversy. Herein, advanced experimental characterization techniques, including in situ environmental transmission electron microscopy (eTEM) and CO2 chemisorption by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), transient 18 O-isotopic exchange, and density functional theory (DFT), are employed to elucidate the mechanism of the CO2 interaction with molten-salt-modified MgO in the 250-400 °C range. Herein, eTEM studies using low (2-3 mbar) and high (700 mbar) CO2 pressures illustrate the dynamic evolution of the molten NaNO3 salt promoted and unpromoted MgO carbonation with high magnification (<50 nm). The formation of 18 O-NaNO3 (use of 18 O2 ) and C16 O18 O following CO2 interaction, verifies the proposed reaction path: conversion of NO3 - (NO3 - → NO2 + + O2- ), adsorption of NO2 + on MgO with significant weakening of CO2 adsorption strength, and formation of [Mg2+ … O2- ] ion pairs preventing the development of an impermeable MgCO3 shell, which largely increases the rate of bulk MgO carbonation | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a CO2 capture | |
| 650 | 4 | |a MgO carbonation | |
| 650 | 4 | |a MgO-based adsorbents | |
| 650 | 4 | |a energy barriers | |
| 650 | 4 | |a surface defects | |
| 700 | 1 | |a Xiao, Jiewen |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Qiang |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Shiyan |e verfasserin |4 aut | |
| 700 | 1 | |a Vasiliades, Michalis A |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Liang |e verfasserin |4 aut | |
| 700 | 1 | |a Gao, Yanshan |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, Qian |e verfasserin |4 aut | |
| 700 | 1 | |a Niu, Yiming |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Bingsen |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yuefeng |e verfasserin |4 aut | |
| 700 | 1 | |a He, Hong |e verfasserin |4 aut | |
| 700 | 1 | |a Efstathiou, Angelos M |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Advanced materials (Deerfield Beach, Fla.) |d 1998 |g 34(2022), 4 vom: 01. Jan., Seite e2106677 |w (DE-627)NLM098206397 |x 1521-4095 |7 nnns |
| 773 | 1 | 8 | |g volume:34 |g year:2022 |g number:4 |g day:01 |g month:01 |g pages:e2106677 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1002/adma.202106677 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 34 |j 2022 |e 4 |b 01 |c 01 |h e2106677 | ||