TY - JOUR
T1 - Critical assessment of the performance of next-generation carbon-based adsorbents for CO2 capture focused on their structural properties
AU - Bermeo, Marie
AU - Vega, Lourdes F.
AU - Abu Zahra, Mohammad
AU - Khaleel, Maryam
N1 - Funding Information:
This work was supported by Khalifa University of Science and Technology (grant numbers CIRA-2018-103 , RC2-2019-007 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - Carbon dioxide emissions and their sharply rising effect on global warming have encouraged research efforts to develop efficient technologies and materials for CO2 capture. Post-combustion CO2 capture by adsorption using solid materials is considered an attractive technology to achieve this goal. Templated materials, such as Zeolite Templated-Carbons and MOF-Derived Carbons, are considered as the next-generation carbon adsorbent materials, owing to their outstanding textural properties (high surface areas of ca. 4000 m2 g−1 and micropore volumes of ca. 1.7 cm3 g−1) and their versatility for surface functionalization. These materials have demonstrated remarkable CO2 adsorption capacities and CO2/N2 selectivities up to ca. 5 mmol g−1 and 100, respectively, at 298 K and 1 bar, and low isosteric heat of adsorption at zero coverage of ca. 12 kJ mol−1. Herein, a review of the advances in preparation of ZTCs and MDCs for CO2 capture is presented, followed by a critical analysis of the effects of textural properties and surface functionality on CO2 adsorption, including CO2 uptake, CO2/N2 selectivity, and isosteric heat of adsorption. This analysis led to the introduction of a Vmicro x N-content factor to evaluate the interplay between N-content and textural properties to maximize the CO2 uptake. Despite their promising performance in CO2 uptake, further testing using mixtures and impurities, and studies on adsorbent regeneration, and cyclic operation are desirable to demonstrate the stability of the MDCs and ZTCs for large scale processes. In addition, advances in scale-up syntheses and their economics are needed.
AB - Carbon dioxide emissions and their sharply rising effect on global warming have encouraged research efforts to develop efficient technologies and materials for CO2 capture. Post-combustion CO2 capture by adsorption using solid materials is considered an attractive technology to achieve this goal. Templated materials, such as Zeolite Templated-Carbons and MOF-Derived Carbons, are considered as the next-generation carbon adsorbent materials, owing to their outstanding textural properties (high surface areas of ca. 4000 m2 g−1 and micropore volumes of ca. 1.7 cm3 g−1) and their versatility for surface functionalization. These materials have demonstrated remarkable CO2 adsorption capacities and CO2/N2 selectivities up to ca. 5 mmol g−1 and 100, respectively, at 298 K and 1 bar, and low isosteric heat of adsorption at zero coverage of ca. 12 kJ mol−1. Herein, a review of the advances in preparation of ZTCs and MDCs for CO2 capture is presented, followed by a critical analysis of the effects of textural properties and surface functionality on CO2 adsorption, including CO2 uptake, CO2/N2 selectivity, and isosteric heat of adsorption. This analysis led to the introduction of a Vmicro x N-content factor to evaluate the interplay between N-content and textural properties to maximize the CO2 uptake. Despite their promising performance in CO2 uptake, further testing using mixtures and impurities, and studies on adsorbent regeneration, and cyclic operation are desirable to demonstrate the stability of the MDCs and ZTCs for large scale processes. In addition, advances in scale-up syntheses and their economics are needed.
KW - 3D framework
KW - Chemical functionalization
KW - CO capture
KW - MOF-derived carbon
KW - Structural properties
KW - Zeolite-templated carbon
UR - http://www.scopus.com/inward/record.url?scp=85121234115&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2021.151720
DO - 10.1016/j.scitotenv.2021.151720
M3 - Review article
C2 - 34861307
AN - SCOPUS:85121234115
SN - 0048-9697
VL - 810
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 151720
ER -