Coal and biomass combustion with CO2 capture by CLOU process using a magnetic Fe-Mn-supported CuO oxygen carrier

Autor: Iñaki Adánez-Rubio, Iván Samprón, María Teresa Izquierdo, Alberto Abad, Pilar Gayán, Juan Adánez
Přispěvatelé: Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas (España), European Commission, Adánez-Rubio, Iñaki, Samprón, Iván, Izquierdo Pantoja, María Teresa, Abad Secades, Alberto, Gayán Sanz, Pilar, Adánez Elorza, Juan, Adánez-Rubio, Iñaki [0000-0002-9579-2551], Samprón, Iván [0000-0002-8372-6151], Izquierdo Pantoja, María Teresa [0000-0002-2408-2528], Abad Secades, Alberto [0000-0002-4995-3473], Gayán Sanz, Pilar [0000-0002-6584-5878], Adánez Elorza, Juan [0000-0002-6287-098X]
Rok vydání: 2022
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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ISSN: 0016-2361
DOI: 10.1016/j.fuel.2021.122742
Popis: 8 figures, 5 tables.
The Chemical Looping with Oxygen Uncoupling (CLOU) process is a derivative technology of the Chemical Looping Combustion (CLC) process for the combustion of both renewable and non-renewable solid fuels. The present work studies the combustion and CO2 capture efficiency of burning coal or biomass using a single Cu-based oxygen carrier with magnetic properties as an oxygen carrier. The combustion of two different coals and three different biomasses was performed in a 1.5 kWth CLOU continuously operated unit for 36 h. The magnetic properties of the oxygen carrier were also studied after combustion and its separation from the ashes. Complete combustion of the fuel to CO2 and H2O was achieved in all cases. For both coals, CO2 capture efficiency increased with fuel reactor temperature, with both reaching values of 97% at 900 °C. The same increase was obtained with the biomasses. The highest CO2 capture efficiency for a biomass was obtained with pine sawdust, which achieved a value of 93%, followed by almond shell (86%) and olive stone (80%) at 900 °C. Oxygen carrier reactivity remained constant after use in the continuous unit with one small increase in the attrition jet index (AJI) value. The used particles were found to still be as magnetic as the fresh particles, and the fines were also highly magnetic. Values higher than 99% were achieved with separation from the fines reached. It was therefore proven that the elutriated oxygen carrier from the plant was still magnetic and could be easily separated from the elutriated ash.
The work presented in this article was supported by the SWINELOOP project (Grant PID2019-106441RB-I00 funded by MCIN/AEI/10.13039/501100011033) and the Spanish Research Council (CSIC) through the Intramural Project (201980E043). I. Adánez-Rubio acknowledges for “Juan de la Cierva” Program (Grant IJC2019-038987-I funded by MCIN/AEI/10.13039/501100011033). I. Samprón acknowledges for the pre-doctoral fellowship (Grant PRE-086217 funded by MCIN/AEI/ 10.13039/501100011033 and by “ESF Investing in your future”).
Databáze: OpenAIRE
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