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CO₂ utilization with a novel dual function material (DFM) for capture and catalytic conversion to synthetic natural gas: An update

Duyar, Melis S., Wang, S., Arellano-Treviño, M.A. and Farrauto, R.J. (2016) CO₂ utilization with a novel dual function material (DFM) for capture and catalytic conversion to synthetic natural gas: An update Journal of CO2 Utilization, 15. pp. 65-71.

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Abstract

Dual function materials (DFMs) for CO₂ capture and conversion couple the endothermic CO₂ desorption step of a traditional adsorbent with the exothermic hydrogenation of CO₂ over a catalyst in a unique way; a single reactor operating at an isothermal temperature (320 °C) and pressure (1atm) can capture CO₂ from flue gas, and release it as methane upon exposure to renewable hydrogen. This combined CO₂ capture and utilization eliminates the energy intensive CO₂ desorption step associated with conventional CO₂ capture systems as well as avoiding the problem of transporting concentrated CO₂ to another site for storage or utilization. Here DFMs containing Rh and dispersed CaO have been developed (˃1% Rh 10% CaO/γ-Al₂O₃) which have improved performance compared to the 5% Ru 10% CaO/γ-Al₂O₃ DFM (0.50 g-mol CH₄/kg DFM) developed previously. Ruthenium remains the catalyst of choice due to its lower price and excellent low temperature performance. The role of CO₂ adsorption capacity on the final methanation capacity of the DFM has also been investigated by testing several new sorbents. Two novel DFM compositions are reported here (5% Ru 10% K₂CO₃/Al₂O₃ and 5% Ru 10% Na₂CO₃/Al₂O₃) both of which have much greater methanation capacities (0.91 and 1.05 g-mol CH₄/kg DFM) compared to the previous 5% Ru 10% CaO/γ-Al₂O₃ DFM.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Duyar, Melis S.m.duyar@surrey.ac.uk
Wang, S.
Arellano-Treviño, M.A.
Farrauto, R.J.
Date : September 2016
DOI : 10.1016/j.jcou.2016.05.003
Uncontrolled Keywords : Adsorbents; CO₂ capture; Methanation; Rhodium; Ruthenium
Additional Information : No further action
Depositing User : Clive Harris
Date Deposited : 12 Jun 2019 13:49
Last Modified : 12 Jun 2019 13:49
URI: http://epubs.surrey.ac.uk/id/eprint/851978

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