Template-free synthesis of kaolin-based mesoporous silica with improved specific surface area by a novel approach

Li, Tiantian; Shu, Zhu; Zhou, Jun; Chen, Yun; Yu, Dongxue; Yuan, Xin; Wang, Yanxin

doi:10.1016/j.clay.2015.01.022

Cited by 32 publications

(8 citation statements)

References 35 publications

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“…The specific surface areas measured were respectively 9.2 and 45 m 2 ·g −1 for BIO and LAT. These values are consistent with the specific surface areas usually observed (Chotpantarat et al, 2011;Li et al, 2015;Silva et al, 2009). In previous works the increase of the specific surface area of clay enriched in iron oxides was shown to be related to the iron oxide content of the mineral in the form of nodules on clay platelets (Arias et al, 1995;Sei et al, 2006;Lecomte-Nana et al, 2013).…”

Section: Characterization Of Mineralssupporting

confidence: 89%

Binding and setting of kaolin based materials with natural organic acids

Martias

Villandier

Thune

et al. 2015

Applied Clay Science

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Section: Characterization Of Mineralssupporting

confidence: 89%

Binding and setting of kaolin based materials with natural organic acids

Martias

Villandier

Thune

et al. 2015

Applied Clay Science

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“…Investigations of the porous structure show that, with a small amount of silica, the nanocomposite materials obtained have a larger specific surface area and higher content of micro-and mesopores compared to original montmorillonite. The materials obtained by the template-free sol-gel synthesis are not inferior or have similar structural and sorption properties in comparison with the materials described in the works discussed above [13][14][15][16].…”

Section: Discussion Of the Results Of The Study Of The Influence Of Smentioning

confidence: 65%

“…However, the use of hydrothermal synthesis also complicates the process of obtaining the end material. In [16], the authors proposed the method of synthesis with additional treatment of the material with a solution of hydrochloric acid. However, the application of the above methods is inferior to direct synthesis with clay minerals and tetraethoxysilane hydrolysis products as a source of silica.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Investigation of the structure and sorption peculiarities of cobalt and uranium ions by nanocomposites based on montmorillonite and tetraethoxysilane

Doroshenko

Pylypenko

Kovalchuk³

et al. 2018

EEJET

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6 organisms. One of the most dangerous heavy metals and radionuclides are uranium and cobalt compounds. Uranium compounds are widely used in the nuclear fuel cycle. They get into the environment mainly with the wastewater of hydrometallurgical plants processing uranium ores and also are components of liquid radioactive waste of nuclear power plants [1]. Pollution by cobalt compounds is possible due 6

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“…El caolín presenta un tamaño de poro entre 20 y 500 Angstrom, un volumen de poro de 0,06cm 3 /g y una superficie específica de 4m 2 /g, lo cual resulta beneficioso en aplicaciones como la adsorción [35]. El caolín ha sido investigado para la remoción de H 2 S y la humedad del gas licuado de petróleo por sus propiedades adsorbentes [36].…”

Section: Caolínunclassified

Aplicación de Modelos Matemáticos en Curvas de Ruptura de contaminantes del Biogás

Vasco-Echeverri

Ramírez-Carmona

Gómez-Mojica

2016

rev.ion

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ResumenEn este proyecto se purifi có el biogás empleando columnas de adsorción independientes empacadas con carbón activado, limadura de hierro, caolín y carbonato de calcio. Los experimentos se realizaron en columnas de polipropileno de 2cm de diámetro y 9cm de longitud. Las curvas de ruptura se construyeron con un fl ujo de biogás promedio diario de 2,2L. Se tomaron muestras durante 28 días como máximo, a las cuales se cuantifi caron la composición del biogás mediante cromatografía de gases y un analizador de gases en línea. Las curvas se ajustaron a tres modelos matemáticos. En el caso del Carbón activado se obtuvo un coefi ciente de correlación de 0,9987 y 0,9991 para el Sulfuro de Hidrógeno (H 2 S) y el Amoniaco (NH 3 ), respectivamente. En el caso de la limadura de hierro se obtuvo un coefi ciente de correlación de 0,9945 y 0,9975 para el H 2 S y NH 3 , respectivamente. Empleando caolín se obtuvo un coefi ciente de correlación de 0,9994 y 0,9885 para el H 2 S y NH 3 , respectivamente. Con Carbonato de Calcio se obtuvo un coefi ciente de correlación de 0,9988 y 0,9985 para el H 2 S y NH 3 , respectivamente. El porcentaje de remoción del H 2 S y del NH 3 del carbón activado fue del 72,6%, la limadura de hierro fue del 74,1%, el caolín fue del 32,7% y del carbonato de calcio del 65,4%. Palabras clave: Modelos matemáticos, curvas de ruptura, purifi cación de biogás, sulfuro de hidrógeno, amoniaco, adsorción. AbstractIn this project biogas was purifi ed using separate packed bed adsorption columns using activated carbon, iron fi lings, kaolin and calcium carbonate. Experiments were performed in 2cm diameter and 9cm length polypropylene columns. The breakthrough curves were constructed with an average biogas fl ow of 2.2L per day. Samples were taken for almost 28 days, which biogas composition were quantifi ed using gas chromatography and online gas analyser. The curves were fi tted to three mathematical models. Using activated carbon a correlation coeffi cient of 0.9987 and 0.9991 for hydrogen sulfi de (H 2 S) and ammonia (NH 3 ), respectively, were obtained. In the case of iron fi lings a correlation coeffi cient of 0.9945 and 0.9975 for H 2 S and NH 3 , respectively, were obtained. Using kaolin a correlation coeffi cient of 0.9994 and 0.9885 for H 2 S and NH 3 , respectively, were obtained. Finally, using calcium carbonate with a correlation coeffi cient of 0.9988 and 0.9985 for H 2 S and NH 3 , respectively, were obtained. Removal percentage of

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Template-free synthesis of kaolin-based mesoporous silica with improved specific surface area by a novel approach

Cited by 32 publications

References 35 publications

Binding and setting of kaolin based materials with natural organic acids

Binding and setting of kaolin based materials with natural organic acids

Investigation of the structure and sorption peculiarities of cobalt and uranium ions by nanocomposites based on montmorillonite and tetraethoxysilane

Aplicación de Modelos Matemáticos en Curvas de Ruptura de contaminantes del Biogás

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