Acidity Characterization of Amorphous Silica–Alumina

2012 ◽  
Vol 116 (40) ◽  
pp. 21416-21429 ◽  
Author(s):  
Emiel J.M. Hensen ◽  
Dilip G. Poduval ◽  
Volkan Degirmenci ◽  
D.A J. Michel Ligthart ◽  
Wenbin Chen ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Silica Alumina

scholarly journals NMR Spectroscopic Characterization of Flame‐Made Amorphous Silica‐Alumina for Cyclohexanol and Glyceraldehyde Conversion

ChemCatChem ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 287-293 ◽  
Author(s):  
Zichun Wang ◽  
Yijiao Jiang ◽  
Catherine Stampfl ◽  
Alfons Baiker ◽  
Michael Hunger ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Spectroscopic Characterization ◽  
Silica Alumina

Synthesis and characterization of amorphous silica-alumina with enhanced acidity and its application in hydro-isomerization/cracking

Fuel ◽  
2020 ◽  
Vol 279 ◽  
pp. 118487 ◽  
Author(s):  
Tao Li ◽  
Ling Zhang ◽  
Zhichao Tao ◽  
Caixia Hu ◽  
Chunli Zhao ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Synthesis And Characterization ◽  
Silica Alumina

scholarly journals Kaolin as a Source of Silica and Alumina For Synthesis of Zeolite Y and Amorphous Silica Alumina

2018 ◽  
Vol 156 ◽  
pp. 05002 ◽  
Author(s):  
Endang Sri Rahayu ◽  
Gatot Subiyanto ◽  
Arief Imanuddin ◽  
Wiranto ◽  
Sabrina Nadina ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Amorphous Silica ◽  
Solid Phase ◽  
Zeolite Y ◽  
Hydrothermal Process ◽  
Precipitation Method ◽  
Alkaline Condition ◽  
Silica Alumina ◽  
Co Precipitation

Kaolin is the clay mineral which containing silica (SiO2) and alumina (Al2O3) in a high percentage, that can be used as a nutrient in the synthesis of zeolites and amorphous silica alumina (ASA). The objective of this research is to convert the Belitung kaolin into silica and alumina as nutrients for the synthesis of zeolites and amorphous silica alumina, which are required in the preparation of the catalysts. Silica and alumina contained in the kaolin were separated by leaching the active kaolin called as metakaolin, using HCL solution, giving a solid phase rich silica and a liquid phase rich alumina. The solid phase rich silica was synthesized to zeolite Y by adding seed of the Y Lynde type, through the hydrothermal process with an alkaline condition. While, the liquid phase rich alumina was converted into an amorphous silica alumina through a co precipitation method. Characterization of zeolite and ASA were done using XRD, surface area and pore analyzer and SEM. The higher of alumina in liquid phase as a result of the rising molar of HCL in the leaching process was observed, but it didn’t work for its rising time. Products of ASA and zeolite Y were obtained by using liquid phase rich alumina and solid phase rich silica, respectively, which resulted through leaching metakaolin in 2.5 M HCl at temperature of 100° C for 2 hours.

Phosphoric acid on oxide carriers. 1. Characterization of silica, alumina, and titania impregnated by phosphoric acid

Langmuir ◽  
1989 ◽  
Vol 5 (4) ◽  
pp. 911-916 ◽  
Author(s):  
Guido Busca ◽  
Gianguido Ramis ◽  
Vincenzo Lorenzelli ◽  
Pier Francesco Rossi ◽  
Aldo La Ginestra ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Silica Alumina

Systematic characterization of polycrystalline silica–carbonate helices

2016 ◽  
Vol 18 (33) ◽  
pp. 23044-23052 ◽  
Author(s):  
Elias Nakouzi ◽  
Pamela Knoll ◽  
Kenzie B. Hendrix ◽  
Oliver Steinbock
Keyword(s):  
Amorphous Silica ◽  
Barium Carbonate ◽  
Alkaline Media

Biomorphs are complex, life-like structures that emerge from the precipitation of barium carbonate and amorphous silica in alkaline media.

γ-Alumina and Amorphous Silica–Alumina: Structural Features, Acid Sites and the Role of Adsorbed Water

2017 ◽  
Vol 60 (19-20) ◽  
pp. 1554-1564 ◽  
Author(s):  
Vicente Sanchez Escribano ◽  
Gabriella Garbarino ◽  
Elisabetta Finocchio ◽  
Guido Busca
Keyword(s):  
Amorphous Silica ◽  
Adsorbed Water ◽  
Structural Features ◽  
Acid Sites ◽  
Silica Alumina
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