Document Detail

High CO(2) storage capacity in alkali-promoted hydrotalcite-based material: in situ detection of reversible formation of magnesium carbonate.
MedLine Citation:
PMID:  20853277     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Alkali-promoted hydrotalcite-based materials showed very high CO(2) storage capacity, exceeding 15 mmol g(-1) when the carbonation reaction was carried out at relatively high temperature (300-500 °C) and high partial pressure of steam and CO(2). In situ XRD experiments have allowed correlation of high CO(2) capacity to the transformation of magnesium oxide centres into magnesium carbonate in alkali-promoted hydrotalcite-based material. Moreover, it has been clearly shown that crystalline magnesium carbonate may be reversibly formed at temperatures above 300 °C in the presence of sufficient partial pressure of steam in the gas phase, conditions that are prevalent in pre-combustion CO(2) capture. The role of steam appears to be of utmost importance for the formation of the bulk carbonate phase and for its reversibility. It is proposed that a high partial pressure of steam keeps the magnesium oxide periclase phase sufficiently hydroxylated to allow magnesium carbonate formation if a relatively high partial pressure CO(2) is present in the gas phase.
Stéphane Walspurger; Paul D Cobden; Olga V Safonova; Yinghai Wu; Edward J Anthony
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chemistry (Weinheim an der Bergstrasse, Germany)     Volume:  16     ISSN:  1521-3765     ISO Abbreviation:  Chemistry     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-10-29     Completed Date:  2011-01-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9513783     Medline TA:  Chemistry     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  12694-700     Citation Subset:  -    
Hydrogen and Clean Fossil Fuel Department, Energy research Centre of the Netherlands (ECN), Westerduinweg 3, 1755ZG, Petten, The Netherlands.
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