Reactivity stabilization and capacity study of fabricated alumina and zirconia‐supported CaO‐based sorbents for high‐temperature CO2 capture in a fixed‐bed reactor. (10th November 2022)

• Record Type: Journal Article
• Authors: Mohammadi, Mahshid; Sedghkerdar, Mohammad Hashem; Abbasi, Mohsen; Izadbakhsh, Ali; Karami, Davood
• Is Part Of: Canadian journal of chemical engineering. Volume 101:Number 5(2023)
• Page Start: 2548
• Page End: 2555
• Publication Date: 2022-11-10
• Subjects: calcium looping -- CO2 capture -- co‐precipitation -- fixed‐bed reactor -- stabilizers; Chemical engineering -- Periodicals; Technology -- Periodicals; 660.05
• DOI: 10.1002/cjce.24670
• Languages: English
• ISSNs: 0008-4034

Abstract

Abstract: Calcium looping process is a promising approach for CO2 capture from the flue gas of fossil fuel power plants and the cement industry. Even though the advantages of calcium‐based sorbents are low cost and high uptake capacity, they suffer from low durability during cycles. Modified sorbents were fabricated by adding alumina and zirconia and the mixture of alumina and zirconia to calcium oxide via the co‐precipitation method. The performance of synthesized sorbents in terms of stability and CO2 capture capacity were evaluated using a fixed bed reactor in various CO2 sorption/desorption cycles. The sorbents were fabricated by a co‐precipitation methodology using 10% binders (alumina and/or silica). X‐ray diffraction (XRD), BET/BJH, and scanning electron microscopy (SEM) were conducted for characterization of synthesized sorbents. CaO‐10% ZrO2 showed the best performance among the fabricated sorbents in terms of stability during 5 cycles and CO2 capacity (14 mmol CO2 /g sorbent). The formation of CaZrO3 with a perovskite structure and high‐temperature resistance could be attributed to well performance of zirconia‐supported sorbent. On the other hand, no sign of aluminum zirconate formation was approved in XRD analysis for the fabricated sorbent using mixed binders of zirconia and alumina to enhance its stability during cycles. Abstract : Synthetic calcium‐based sorbents for the high‐temperature CO2 capture process.