Application of high-purity zeolite a synthesized from different coal combustion by-products in carbon dioxide capture
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2019
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International Journal of Environmental Impacts
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High-purity zeolites A were synthesized from different coal combustion by-products (baghouse filter
fly ash, cyclone filter ash, and bottom ash) and characterized in terms of morphology, chemical, and
mineralogical composition. The products were tested for carbon dioxide capture by using a continuous
CO2 flow system passing through a column packed with the adsorbent material, which was connected
to an analyser that directly measures the concentration of CO2. The values of CO2 adsorption capacities
calculated for the unmodified Na-A zeolites (ZABF, ZACF, and ZABA) were 556.48, 494.29 and
654.82 mg g–1, respectively. These values were higher than those achieved by the calcium-modified
zeolite samples. ZABA adsorbent presented the best performance in CO2 capture when compared to
the other adsorbent material and achieved an adsorption capacity 32% higher than a 4A commercial
zeolite. In the adsorption cycles study, the percentage of CO2 desorption by ZABA at the second and
third cycles reached 93%, showing that zeolite A can be regenerated by heating at 150 ºC. The use of
coal ashes to obtain zeolites and the application of these products for the CO2 adsorption can be an important
strategy to mitigate both the problem of waste management and the greenhouse gases emission
in coal-fired power plants.
Como referenciar
IZIDORO, JULIANA; CASTANHO, DAVI; ROSSATI, CARLOS; FUNGARO, DENISE; GUILHEN, SABINE; NOGUEIRA, THIAGO; ANDRADE, MARIA de F. Application of high-purity zeolite a synthesized from different coal combustion by-products in carbon dioxide capture. International Journal of Environmental Impacts, v. 2, n. 3, p. 215-228, 2019. DOI: 10.2495/EI-V2-N3-215-228. Disponível em: http://repositorio.ipen.br/handle/123456789/30381. Acesso em: 13 Feb 2025.
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