A two carriers reactor configuration for chemical-looping combustion in a packed-bed. (August 2020)

• Record Type: Journal Article
• Authors: Mancusi, Erasmo; Bareschino, Piero; Forgione, Annunziata; Pepe, Francesco
• Is Part Of: International journal of greenhouse gas control. Volume 99(2020)
• Publication Date: 2020-08
• Subjects: Chemical Looping Combustion -- CO2 capture -- Two-stage CLC -- Packed beds -- Power production; Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2020.103099
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: Two Stage (TS)-CLC of CH4 in a fixed bed reactors network was numerically studied. TS-CLC reactor has shorter cycle times than a same-sized single stage CLC one. TS-CLC reactor needs lesser active phases content to perform like a CLC one. TS-CLC network has less units and generate 40 % more electrical power than a CLC one. Abstract: A numerical model of a Chemical Looping Combustion (CLC) fixed bed reactors network for CH4 combustion is developed and studied in the present paper. The network is based on a parallel arrangement of couples of reactors in series. For every couple, the first reactor is filled with a Cu-based oxygen carrier (OC) while the second one exploits a Ni-based OC. The developed model allows to evaluate the performances of the proposed system in terms of both generated thermal power and flow and composition of the gaseous output streams. For the same bed length and cross-sectional area, the proposed two-stage CLC reactor has similar performances to a single carrier one in terms of outlet gas temperature, allowing however for shorter cycle times and requiring a lower amount of active phases contents with respect to this latter. Moreover, fewer units to be arranged in the network are required for the proposed two-stage CLC system than the single-stage one.