Novel molecular integrated process model for biomethane upgradation by CO2 capture with monoethanolamine Online publication date: Wed, 11-May-2022
by Neha Kumari Agarwal; Niloy Kundu; Supriya Sarkar
International Journal of Global Warming (IJGW), Vol. 27, No. 1, 2022
Abstract: This work is aimed to develop a novel method for CO2 capture leading to high calorific value renewable fuel generation. Monoethanolamine (MEA) is one of the most common solvents used for post combustion CO2 capture from flue gas. However, substituting this solvent for biomethane upgradation requires the knowledge of the molecular chemistry involved. Therefore, to understand the interactions, density functional theory (DFT) calculations were performed. Further, a process model was developed in Aspen Plus for capturing CO2 from biogas using MEA as solvent. To optimise the process various sensitivity analysis was performed with variation of number of absorber and stripper stages, distribution coefficient of CO2 and methane in MEA, etc. Finally, an effective model was developed incorporating both the molecular chemistry of solvent as well as the process parameters to upgrade biomethane to be used as a renewable fuel along with sustainable waste management.
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