Oxy-Fuel combustion in an entrained flow reactor for regeneration of spent Calcium Looping sorbents
Calcium Looping (CaL) is one of the most promising technologies for large-scale CO2 capture of flue gases from power plants and industrial processes. A Ca-based sorbent, mostly CaO derived from limestone, is used to capture CO2 in the first step, while being regenerated in the second step. The aim of this study was to investigate the regeneration step of a novel CaL concept, which uses Ca(OH)2 as CO2 capture sorbent for backup power plants (“BackCap” concept). The spent sorbent after CO2 capture was calcined in an entrained flow reactor, using oxy-fuel conditions. In particular, the calcination degrees of the sorbent that were reached during a few seconds residence time in the reactor, were of main interest in this study. Therefore, experiments including parameter variations were carried out in a drop-tube and an entrained flow reactor to calcine the carbonated Ca(OH)2 particles. Calcination degrees of almost 0.6 were reached within the test facility used, while calcining in short residence times (i.e. <5 s) under oxy-fuel conditions. The experimental results obtained were implemented into a calcination model, indicating that full calcination of particles under oxy-fuel conditions is possible within reasonable residence time (i.e. 10 s).
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Elsevier
2025-02-01
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| Subjects: | Ensure access to affordable, reliable, sustainable and modern energy for all, Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation, |
| Online Access: | http://hdl.handle.net/10261/377630 https://api.elsevier.com/content/abstract/scopus_id/85210074377 |
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| Summary: | Calcium Looping (CaL) is one of the most promising technologies for large-scale CO2 capture of flue gases from power plants and industrial processes. A Ca-based sorbent, mostly CaO derived from limestone, is used to capture CO2 in the first step, while being regenerated in the second step. The aim of this study was to investigate the regeneration step of a novel CaL concept, which uses Ca(OH)2 as CO2 capture sorbent for backup power plants (“BackCap” concept). The spent sorbent after CO2 capture was calcined in an entrained flow reactor, using oxy-fuel conditions. In particular, the calcination degrees of the sorbent that were reached during a few seconds residence time in the reactor, were of main interest in this study. Therefore, experiments including parameter variations were carried out in a drop-tube and an entrained flow reactor to calcine the carbonated Ca(OH)2 particles. Calcination degrees of almost 0.6 were reached within the test facility used, while calcining in short residence times (i.e. <5 s) under oxy-fuel conditions. The experimental results obtained were implemented into a calcination model, indicating that full calcination of particles under oxy-fuel conditions is possible within reasonable residence time (i.e. 10 s). |
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