Integrated Capture and Conversion of CO 2 to Methane Using a Water-lean, Post-Combustion CO 2 Capture Solvent.

Autor: Kothandaraman J; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Saavedra Lopez J; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Jiang Y; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Walter ED; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Burton SD; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Dagle RA; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA., Heldebrant DJ; Pacific Northwest National Laboratory, Advances Energy Systems, 902 Battelle Blvd, Richland, Washington, 99352, USA.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2021 Nov 04; Vol. 14 (21), pp. 4812-4819. Date of Electronic Publication: 2021 Oct 05.
DOI: 10.1002/cssc.202101590
Abstrakt: Integrated carbon capture and conversion of CO 2 into materials (IC 3 M) is an attractive solution to meet global energy demand, reduce our dependence on fossil fuels, and lower CO 2 emissions. Herein, using a water-lean post-combustion capture solvent, [N-(2-ethoxyethyl)-3-morpholinopropan-1-amine] (2-EEMPA), >90 % conversion of captured CO 2 to hydrocarbons, mostly methane, is achieved in the presence of a heterogenous Ru catalyst under relatively mild reaction conditions (170 °C and <15 bar H 2 pressure). The catalytic performance was better in 2-EEMPA than in aqueous 5 m monoethanol amine (MEA). Operando nuclear magnetic resonance (NMR) study showed in situ formation of N-formamide intermediate, which underwent further hydrogenation to form methane and other higher hydrocarbons. Technoeconomic analyses (TEA) showed that the proposed integrated process can potentially improve the thermal efficiency by 5 % and reduce the total capital investment and minimum synthetic natural gas (SNG) selling price by 32 % and 12 %, respectively, compared to the conventional Sabatier process, highlighting the energetic and economic benefits of integrated capture and conversion. Methane derived from CO 2 and renewable H 2 sources is an attractive fuel, and it has great potential as a renewable hydrogen carrier as an environmentally responsible carbon capture and utilization approach.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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