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Enhancement of CO2 adsorption on phenolic resin-based mesoporous carbons by KOH activation

de Souza, Luiz K.C. ; Wickramaratne, Nilantha P. ; Ello, Aimé Serge ; Costa, Maria J.F. ; da Costa, Carlos E.F. ; Jaroniec, Mietek

Carbon (New York), 2013-12, Vol.65, p.334-340 [Periódico revisado por pares]

Kidlington: Elsevier Ltd

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Enhancement of CO2 adsorption on phenolic resin-based mesoporous carbons by KOH activation
Autor: de Souza, Luiz K.C. ; Wickramaratne, Nilantha P. ; Ello, Aimé Serge ; Costa, Maria J.F. ; da Costa, Carlos E.F. ; Jaroniec, Mietek
Assuntos: Activation ; Adsorption ; Carbon ; Carbon dioxide ; Chemistry ; Colloidal state and disperse state ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Fullerenes and related materials; diamonds, graphite ; General and physical chemistry ; Materials science ; Microporosity ; Physics ; Porous materials ; Specific materials ; Surface area ; Surface chemistry ; Surface physical chemistry ; Uptakes
É parte de: Carbon (New York), 2013-12, Vol.65, p.334-340
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Carbons with high surface area and large volume of ultramicropores were synthesized for CO2 adsorption. First, mesoporous carbons were produced by soft-templating method using triblock copolymer Pluronic F127 as a structure directing agent and formaldehyde and either phloroglucinol or resorcinol as carbon precursors. The resulting carbons were mainly mesoporous with well-developed surface area, large total pore volume, and only moderate CO2 uptake. To improve CO2 adsorption, these carbons were subjected to KOH activation to enhance their microporosity. Activated carbons showed 2–3-fold increase in the specific surface area, resulting from substantial development of microporosity (3–5-fold increase in the micropore volume). KOH activation resulted in enhanced CO2 adsorption at 760mmHg pressure: 4.4mmolg−1 at 25°C, and 7mmolg−1 at 0°C. This substantial increase in the CO2 uptake was achieved due to the development of ultramicroporosity, which was shown to be beneficial for CO2 physisorption at low pressures. The resulting materials were investigated using low-temperature nitrogen physisorption, CO2 sorption, and small-angle powder X-ray diffraction. High CO2 uptake and good cyclability (without noticeable loss in CO2 uptake after five runs) render ultramicroporous carbons as efficient CO2 adsorbents at ambient conditions.
Editor: Kidlington: Elsevier Ltd
Idioma: Inglês

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Enhancement of CO2 adsorption on phenolic resin-based mesoporous carbons by KOH activation

de Souza, Luiz K.C. ; Wickramaratne, Nilantha P. ; Ello, Aimé Serge ; Costa, Maria J.F. ; da Costa, Carlos E.F. ; Jaroniec, Mietek

Kidlington: Elsevier Ltd

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