High temperature sequestration of CO2 using lithium zirconates
Iwan, Alina, Stephenson, Hazel, Ketchie, William C. and Lapkin, Alexei. (2009) High temperature sequestration of CO2 using lithium zirconates. Chemical Engineering Journal, Vol.146 (No.2). pp. 249-258. ISSN 1385-8947Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.cej.2008.06.006
Equilibrium and kinetics of CO2 reaction with lithium zirconates synthesised by two different methods are reported. Considerably faster rates of high temperature reaction were obtained for the new material synthesised by a soft-chemistry route without the use of alkaline metal dopants, in comparison with the available literature data, with the highest rate 0.83 wt% min−1. Lithium zirconate was found to be stable in consecutive forward–backward reaction cycles. Reaction rate dependency on the partial CO2 pressure was examined. The apparent slow reaction rates at pCO2<0.4 bar are due to mass transfer limitations. Detailed analysis of the reverse reaction of decomposition of lithium carbonate–zirconia mixed matrix revealed complex three-step behaviour, which was associated with the transition from reaction to mass transfer control. The latter was successfully eliminated in the material prepared from a high surface area zirconia precursor. Low temperature interaction between lithium zirconate and CO2 revealed during experiments performed at 25–550 °C is also discussed.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
T Technology > TP Chemical technology
|Divisions:||Faculty of Science > Engineering|
|Library of Congress Subject Headings (LCSH):||Sequestration (Chemistry), Carbon dioxide, Lithium zirconate, Chemical equilibrium, Chemical kinetics|
|Journal or Publication Title:||Chemical Engineering Journal|
|Number of Pages:||10|
|Page Range:||pp. 249-258|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Engineering and Physical Sciences Research Council (EPSRC), MEL Chemicals|
|Grant number:||GR/S24992/01 (EPSRC)|
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