Mesoporous Aluminosilicate Molecular Sieve: Control of Textural Properties by Post-Synthesis Hydrothermal Reatment

Hidrobo, Alexis; Retuert, Jaime; Araya, Paulo

doi:10.4067/s0717-97072003000300007

Cited by 5 publications

(6 citation statements)

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“…The mesopore surface area (SBJH) and mesopore volume (VBJH) were obtained from the pore size distribution curves. The average mesopore diameter (DBJH) was calculated as 4 VBJH/SBJH. , …”

Section: Methodsmentioning

confidence: 99%

“…This hysteresis loop is indicative of mesoporosity. 21,22 Because the hysteresis loop at high partial pressure (p/ p 0 > 0.8) is associated with textural mesoporosity or macroporosity, it can be concluded that the Al/Si sample lacks textural mesoporosity, as indicated by the absence of a hysteresis loop at p/p 0 > 0.8. However, when the sample is subjected to the addition of Zn, the material presents a type IV isotherm.…”

Section: Characterization Of Aluminosilicatesmentioning

confidence: 99%

“…Aluminum silicates have been widely used to effectively catalyze reactions, such as gas oil cracking, in fluid catalytic cracking (FCC) processes as a matrix, in organic chemistry for Diels–Alder reactions, and in selective ether cleavege. − In this work, the aluminum silicates are investigated for the first time for the catalytic cracking of waste motor oil in a batch reactor. These experimental data have been used to determine a simple kinetic model for the catalytic cracking reaction.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Study of the Thermal and Catalytic Cracking of Waste Motor Oil to Diesel-like Fuels

et al. 2016

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Considering the serious impact caused to the environment by the inappropriate disposal of waste motor oils, it is essential to find alternative mechanisms to handle and dispose these wastes in a controlled process. The reuse of waste motor oil as a resource for the synthesis of diesel-like fuels provides an alternative way for the disposal of this residue in a feasible, sustainable, and environmentally responsible way. This work addresses the kinetic study of the catalytic cracking of waste motor oil using mesoporous aluminum silicate materials impregnated with 1 and 2% zinc. Both the waste motor oil and liquid fuel product were characterized according to ASTM standards to ensure an adequate characterization and to guarantee the proper quality of the product. The results from the overall kinetic approach show that the cracking reaction can be described using a first-order rate equation with respect to the concentration of the used motor oil. The activation energy for the thermal cracking reaction is 370 kJ/mol. It is reduced by 22% to 287 kJ/mol when the alumina silicate catalysts are used. Also, during the reaction, the overall yield of the reaction with respect to the liquid fuel is increased from 63% during the thermal reaction to 90% during the catalytic reaction.

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“…The mesopore surface area (SBJH) and mesopore volume (VBJH) were obtained from the pore size distribution curves. The average mesopore diameter (DBJH) was calculated as 4 VBJH/SBJH. , …”

Section: Methodsmentioning

confidence: 99%

Section: Characterization Of Aluminosilicatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetic Study of the Thermal and Catalytic Cracking of Waste Motor Oil to Diesel-like Fuels

et al. 2016

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“…Dentro de esta perspectiva, se han obtenido sílicas, alúminas, y sílica-alúminas mesoporosas utilizando aminas, surfactantes, polímeros y copolímeros en bloque como agentes de modelación estructural [4][5][6]. Una vez realizada la calcinación, el material final se obtiene con un tamaño de poro que, en forma general, está en relación con las dimensiones de la estructura orgánica utilizada como modelador (template).…”

Section: Qwurgxfflyqunclassified

“…Sin embargo, es importante recalcar que el material no presenta ningún signo de cristalinidad previo al tratamiento. Estos signos son claros indicadores que el proceso de formación de la red alrededor del quitosano, para obtener la estructura mesoporosa, se lleva a cabo de una manera desordenada; tal como ocurre en aquellos casos de formación de sílice o silice-alumina sin la presencia de un director estructural o template del tipo surfactante [6,7].…”

Section: Hvxowdgrv \ Glvfxvlyqunclassified

Aluminosilicatos mesoporosos catalíticamente activos obtenidos usando el biopolímero quitosano como agente formador de poros

Hidrobo

Retuert

Araya

2009

Av. Cienc. Ing. (Quito)

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Este trabajo presenta la síntesis, y caracterización parcial, de aluminosilicatos mesoporosos obtenidos a partir de un xerogel híbrido organo-inorgánico, utilizando el biopolímero quitosano conjuntamente con un proceso de tratamiento hidrotermal como herramientas de modelación estructural. Mediante comparación con las características de su contraparte blanco, que carece de quitosano, se establece el papel del biopolímero como generador de mesoporosidad y estabilizador de la red.Mediante la reacción de craqueo catalítico de Cumeno se determina que el material posee, a diferencia del material preparado sin quitosano, grupos ácidos con buena estabilidad hidrotermal. Esto hace que pueda ser considerado como un potencial catalizador para la transformación de moléculas de gran tamaño.

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Polymer coated vermiculite–iron composites: Novel floatable magnetic adsorbents for water spilled contaminants

Machado

Lima

Paniago

et al. 2006

Applied Clay Science

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Mesoporous Aluminosilicate Molecular Sieve: Control of Textural Properties by Post-Synthesis Hydrothermal Reatment

Cited by 5 publications

References 0 publications

Kinetic Study of the Thermal and Catalytic Cracking of Waste Motor Oil to Diesel-like Fuels

Kinetic Study of the Thermal and Catalytic Cracking of Waste Motor Oil to Diesel-like Fuels

Aluminosilicatos mesoporosos catalíticamente activos obtenidos usando el biopolímero quitosano como agente formador de poros

Polymer coated vermiculite–iron composites: Novel floatable magnetic adsorbents for water spilled contaminants

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