Chemical looping approaches to decarbonization via CO2 repurposing

Schmidt, Camilla; Shi, Hanzhong; Maiti, Debtanu; Hare, Bryan J.; Bhethanabotla, Venkat R.; Kuhn, John N.

doi:10.1007/s43938-023-00030-9

Cited by 4 publications

References 93 publications

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Effect of higher H2S concentration over CO2 in acid gas mixtures during geosequestration

Ofori,

Barifcani,

Phan

2023

Discov Chem Eng

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Decarbonisation of most industrial processes is imperative to achieve climate neutrality. In oil and gas, carbon dioxide (CO2) and natural gas are being discovered together with increasingly higher quantities of hydrogen sulphide (H2S). The negative effects of acid gases (predominantly CO2 and H2S) in that industry mean they have to be separated before both natural gas and petroleum fuels can be classified as safe for transportation and usage. The separated acid gas, usually composed of a higher CO2 volume is stored and utilised in enhanced oil recovery (EOR) or geologically stored (geosequestered) in formations. There are increasingly instances in which higher volume of H2S acid gas mixtures are being discovered and explored. In this work, the effects of a higher mole percentage H2S in an acid gas mixture is investigated using molecular dynamics simulations. The analysis found that it was easier for higher CO2 acid mixtures to reach pressure convergence comparatively. It has also been discovered that higher H2S acid gas mixtures had lower interfacial tension, which makes them more hydrophilic and more miscible with the formation water. The higher H2S acid gas content mixtures also have wider water coverage widths and greater interfacial interactivity between the injected and formation fluids. From the density profiles, H2S gas in the higher H2S acid gas mixture is found to have more influence on the higher H2S acid gas/water injection/sequestration process compared to the effect of CO2 on the higher CO2 acid gas mixture/water. While H2S is slightly more polar than the nonpolar CO2, the carbon of CO2’s ability to form strong dipole–dipole interactions with the oxygen of water increases the CO2's polarity, and this is reflected in the assertion of the primacy of the $${\text{O}}_{{{\text{H}}_{{2}} {\text{O}}}} \cdots {\text{C}}_{{{\text{CO}}_{{2}} }}$$ O H 2 O ⋯ C CO 2 interaction over all other pairs from the radial distribution function in the water/acid gas mixture during geosequestration. This demonstrates also that a reduction in interfacial tension is possible even for hydrophobic phases.

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Effect of higher H2S concentration over CO2 in acid gas mixtures during geosequestration

Ofori,

Barifcani,

Phan

2023

Discov Chem Eng

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From brewers’ waste to fuel precursors: Catalytic pyrolysis of BSG using CaO and Nb2O5-based catalysts for enhanced hydrocarbon production

de Souza dos Santos,

Oliveira,

Moura

et al. 2025

Journal of Analytical and Applied Pyrolysis

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Design and Application of Joule Heating Processes for Decarbonized Chemical and Advanced Material Synthesis

Griffin,

Robertson,

Gunter

et al. 2024

Ind. Eng. Chem. Res.

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Atmospheric CO 2 concentrations keep increasing at intensifying rates due to rising energy and material demands. The chemical production industry is a large energy consumer, responsible for up to 935 Mt of CO 2 emissions per year, and decarbonization is its major goal moving forward. One of the primary sources of energy consumption and CO 2 emissions in the chemical sector is associated with the production and use of heat for material synthesis, which conventionally was generated through the combustion of fossil fuels. To address this grand challenge, Joule heating has emerged as an alternative heating method that greatly increases process efficiency, reducing both energy consumption and greenhouse gas emissions. In this Review, we discuss the key concepts that govern these Joule heating processes including material selection and reactor design, as well as the current state-of-the-art in the literature for employing these processes to synthesize commodity chemicals along with advanced materials such as graphene, metal species, and metal carbides. Finally, we provide a perspective on future research avenues within this field, which can facilitate the widespread adoption of Joule heating for decarbonizing industrial processes.

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Chemical looping approaches to decarbonization via CO2 repurposing

Cited by 4 publications

References 93 publications

Effect of higher H2S concentration over CO2 in acid gas mixtures during geosequestration

Effect of higher H2S concentration over CO2 in acid gas mixtures during geosequestration

From brewers’ waste to fuel precursors: Catalytic pyrolysis of BSG using CaO and Nb2O5-based catalysts for enhanced hydrocarbon production

Design and Application of Joule Heating Processes for Decarbonized Chemical and Advanced Material Synthesis

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