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Title: Molten Salt Promoting Effect in Double Salt CO2 Absorbents

Abstract

The purpose of this paper is to elaborate on the concept of molten salts as catalysts for CO2 absorption by MgO, and extend these observations to the MgO-containing double salt oxides. We will show that the phenomena involved with CO2 absorption by MgO and MgO-based double salts are similar and general, but with some important differences. This paper focuses on the following key concepts: i) identification of conditions that favor or disfavor participation of isolated MgO during double salt absorption, and investigation of methods to increase the absorption capacity of double salt systems by including MgO participation; ii) examination of the relationship between CO2 uptake and melting point of the promoter salt, leading to the recognition of the role of pre-melting (surface melting) in these systems; and iii) extension of the reaction pathway model developed for the MgO-NaNO3 system to the double salt systems. This information advances our understanding of MgO-based CO2 absorption systems for application with pre-combustion gas streams.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1239483
Report Number(s):
PNNL-SA-114705
Journal ID: ISSN 1932-7447; 47698
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 120; Journal Issue: 2; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
molten salt; CO2 absorption; catalyst; MgO; Environmental Molecular Sciences Laboratory

Citation Formats

Zhang, Keling, Li, Xiaohong S., Chen, Haobo, Singh, Prabhakar, and King, David L. Molten Salt Promoting Effect in Double Salt CO2 Absorbents. United States: N. p., 2016. Web. doi:10.1021/acs.jpcc.5b10729.
Zhang, Keling, Li, Xiaohong S., Chen, Haobo, Singh, Prabhakar, & King, David L. Molten Salt Promoting Effect in Double Salt CO2 Absorbents. United States. https://doi.org/10.1021/acs.jpcc.5b10729
Zhang, Keling, Li, Xiaohong S., Chen, Haobo, Singh, Prabhakar, and King, David L. 2016. "Molten Salt Promoting Effect in Double Salt CO2 Absorbents". United States. https://doi.org/10.1021/acs.jpcc.5b10729.
@article{osti_1239483,
title = {Molten Salt Promoting Effect in Double Salt CO2 Absorbents},
author = {Zhang, Keling and Li, Xiaohong S. and Chen, Haobo and Singh, Prabhakar and King, David L.},
abstractNote = {The purpose of this paper is to elaborate on the concept of molten salts as catalysts for CO2 absorption by MgO, and extend these observations to the MgO-containing double salt oxides. We will show that the phenomena involved with CO2 absorption by MgO and MgO-based double salts are similar and general, but with some important differences. This paper focuses on the following key concepts: i) identification of conditions that favor or disfavor participation of isolated MgO during double salt absorption, and investigation of methods to increase the absorption capacity of double salt systems by including MgO participation; ii) examination of the relationship between CO2 uptake and melting point of the promoter salt, leading to the recognition of the role of pre-melting (surface melting) in these systems; and iii) extension of the reaction pathway model developed for the MgO-NaNO3 system to the double salt systems. This information advances our understanding of MgO-based CO2 absorption systems for application with pre-combustion gas streams.},
doi = {10.1021/acs.jpcc.5b10729},
url = {https://www.osti.gov/biblio/1239483}, journal = {Journal of Physical Chemistry. C},
issn = {1932-7447},
number = 2,
volume = 120,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2016},
month = {Fri Jan 01 00:00:00 EST 2016}
}