Multiple greenhouse gases mitigation (MGM): Process concepts to co-remove non-CO2 (CH4) greenhouse gases and CO2 from air

Sirigina, Devesh Sathya Sri Sairam; Goel, Aditya; Nazir, Shareq Mohd

doi:10.2139/ssrn.4280778

Cited by 2 publications

(1 citation statement)

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“…The concentration of H2O represents the humidity in the air stream we consider in our study. For a given inlet conditions and methane conversion rate, the amount of catalyst (g) at steady state varies linearly with relative humidity (%) [37]. We avoid the H2O induced inhibition by introducing a dehumidifier before the methane oxidation reactor to lower inlet H2O concentration.…”

Section: Thermal Catalytic Routementioning

confidence: 99%

Co-removing methane and carbon dioxide from the atmosphere: Process concepts and analysis

Nazir,

Sirig,

Goel

2023

Preprint

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Methane is the second largest contributor to global warming after CO2, and it is hard to abate due to its low concentration in the emission sources and in the atmosphere. However, removing methane from the atmosphere will accelerate achieving net-zero targets, since its global warming potential is 28 over a 100-year period. This work presents first-of-its-kind process concepts for co-removal of methane and CO2 that combines the catalytic conversion of methane step (thermal/photo-catalytic) with CO2 capture. Proposed processes have been analyzed for streams with lean methane concentrations, which are non-fossil emissions originating in the agricultural sector or natural emissions from wetlands. If the proposed processes can overcome challenges in catalyst/material design to convert methane at low concentrations, they have the potential to remove more than 40% of anthropogenic and natural methane emissions from the atmosphere at a lower energy penalty than the state-of-the-art technologies for direct air capture of CO2.

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Section: Thermal Catalytic Routementioning

confidence: 99%