Work

Oxy-Fuel combustion in an entrained flow reactor for regeneration of spent Calcium Looping sorbents

Year: 2024

Type: article

Abstract: 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. <5s) under oxyfuel conditions. The experimental results obtained were implemented into a calcination model, indicating that full calcination of particles under oxyfuel conditions is possible within reasonable residence time (i.e. 10s).

Source: Fuel

DOI: 10.1016/j.fuel.2024.133784

Authors: Nico Mader, Borja Arias, Jörg Maier, Günter Scheffknecht

Institutions: University of Stuttgart, Instituto Nacional del Carbón

Language: English

Topic: Chemical Looping and Thermochemical Processes

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Responsible consumption and production, Climate action

Open Access status: hybrid

Estimated APC paid: $4,200