Surfactant-assisted hydrothermal crystallization of nanostructured lithium metasilicate (Li{sub 2}SiO{sub 3}) hollow spheres: II-Textural analysis and CO{sub 2}-H{sub 2}O sorption evaluation

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.06.027· OSTI ID:21580213

Ortiz-Landeros, Jose; Gomez-Yanez, Carlos ^[1]; Pfeiffer, Heriberto ^[2]

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1. Departamento de Ingenieria en Metalurgia y Materiales, Escuela Superior de Ingenieria Quimica e Industrias Extractivas, IPN, Av. Instituto Politecnico Nacional s/n, CP 07738 Mexico DF (Mexico)
2. Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito exterior s/n, Ciudad Universitaria, Del. Coyoacan, CP 04510 Mexico DF (Mexico)

In a previous work, the synthesis and structural-microstructural characterization of different nanocrystalline lithium metasilicate (Li{sub 2}SiO{sub 3}) samples were performed. Then, in this work, initially, a textural analysis was performed over the same samples. Li{sub 2}SiO{sub 3} samples prepared with a non-ionic surfactant (TRITON X-114) presented the best textural properties. Therefore, this sample was selected to evaluate its water vapor (H{sub 2}O) and carbon dioxide (CO{sub 2}) sorption properties. Sorption experiments were performed at low temperatures (30-80 deg. C) in presence of water vapor using N{sub 2} or CO{sub 2} as carrier gases. Results clearly evidenced that CO{sub 2} sorption on these materials is highly improved by H{sub 2}O vapor, and of course, textural properties enhanced the H{sub 2}O-CO{sub 2} sorption efficiency, in comparison with the solid-state reference sample. - Graphical abstract: Li{sub 2}SiO{sub 3} varied significantly its capacity of CO{sub 2} absorption as a function of the microstructural properties and by the water presence. Highlights: > We studied the CO{sub 2} absorption on different Li{sub 2}SiO{sub 3} samples in presence of H{sub 2}O vapor. > It was proved that CO{sub 2} absorption on Li{sub 2}SiO{sub 3} is controlled by different factors. > Li{sub 2}SiO{sub 3} with a porous microstructure produces a higher CO{sub 2} absorption. > H{sub 2}O vapor favors the CO{sub 2} absorption on Li{sub 2}SiO{sub 3} due to a surface hydroxylation.

• OSTI ID: 21580213
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 8; Other Information: DOI: 10.1016/j.jssc.2011.06.027; PII: S0022-4596(11)00355-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION
ADSORPTION
CARBON DIOXIDE
CARBON MONOXIDE
COMPARATIVE EVALUATIONS
CRYSTALLIZATION
CRYSTALS
HYDROXYLATION
LITHIUM SILICATES
MICROSTRUCTURE
NANOSTRUCTURES
POROUS MATERIALS
SURFACTANTS
TEMPERATURE RANGE 0065-0273 K
WATER
WATER VAPOR
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
EVALUATION
FLUIDS
GASES
HYDROGEN COMPOUNDS
LITHIUM COMPOUNDS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SILICATES
SILICON COMPOUNDS
SORPTION
TEMPERATURE RANGE
VAPORS