Experimental carbonation of CaO in an entrained flow reactor

Abstract

13 Figuras.- 2 Tablas ; In this work, the feasibility of an entrained flow reactor for full decarbonisation of gas streams has been proved. Three CaO-based materials (two types of lime and calcined raw meal) with different textural properties and therefore, different CO2 carrying capacities have been fed to the entrained flow reactor in a series of tests in which the Ca/CO2 molar ratio and solid residence time were the operation variables studied. Up to 11 mol CO2 m−2 s−1 has been captured from the gas phase with CaO from calcined lime with a maximum CO2 carrying capacity of 0.57 mol CO2 per mol CaO, reaching CO2 capture efficiencies over 90% for a Ca/CO2 molar ratio of 5 and solid residence times under 5 s. ; This work acknowledges the support from the Spanish Ministry of Economy, Industry and Competitiveness through the funding of the project ENE2015-68885-C2-2-R. The authors are also grateful for support from the Regional Aragon Government (DGA) under the research groups' support program. ; We also acknowledge institutional support from the Unit of Information Resources for Research at the "Consejo Superior de Investigaciones Científicas" (CSIC) for the article-processing charges contribution ; Peer reviewed