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Monitoring Solid Oxide CO 2 Capture Sorbents in Action
Author(s) -
Keturakis Christopher J.,
Ni Fan,
Spicer Michelle,
Beaver Michael G.,
Caram Hugo S.,
Wachs Israel E.
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402474
Subject(s) - sorbent , sorption , desorption , adsorption , chemistry , oxide , chemical engineering , environmental chemistry , organic chemistry , engineering
The separation, capture, and storage of CO 2 , the major greenhouse gas, from industrial gas streams has received considerable attention in recent years because of concerns about environmental effects of increasing CO 2 concentration in the atmosphere. An emerging area of research utilizes reversible CO 2 sorbents to increase conversion and rate of forward reactions for equilibrium‐controlled reactions (sorption‐enhanced reactions). Little fundamental information, however, is known about the nature of the sorbent surface sites, sorbent surface–CO 2 complexes, and the CO 2 adsorption/desorption mechanisms. The present study directly spectroscopically monitors Na 2 O/Al 2 O 3 sorbent–CO 2 surface complexes during adsorption/desorption with simultaneous analysis of desorbed CO 2 gas, allowing establishment of molecular level structure–sorption relationships between individual surface carbonate complexes and the CO 2 working capacity of sorbents at different temperatures.