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

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 SEM and EDS Characterization of Porous Coatings Obtained On Titaniumby Plasma Electrolytic Oxidation in Electrolyte Containing Concentrated Phosphoric Acid with Zinc Nitrate

2017 ◽  
Vol 17 (2) ◽  
pp. 41-54 ◽  
Author(s):  
K. Rokosz ◽  
T. Hryniewicz ◽  
K. Pietrzak ◽  
W. Malorny
Keyword(s):  
Phosphoric Acid ◽  
Plasma Electrolytic Oxidation ◽  
Pure Titanium ◽  
Zinc Nitrate ◽  
Porous Coatings ◽  
Electrolytic Oxidation ◽  
Micro Arc Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

AbstractThe SEM and EDS results of porous coatings formed on pure titanium by Plasma Electrolytic Oxidation (Micro Arc Oxidation) under DC regime of voltage in the electrolytes containing of 500 g zinc nitrate Zn(NO3)2·6H2O in 1000 mL of concentrated phosphoric acid H3PO4at three voltages, i.e. 450 V, 550 V, 650 V for 3 minutes, are presented. The PEO coatings with pores, which have different shapes and the diameters, consist mainly of phosphorus, titanium and zinc. The maximum of zinc-to-phosphorus (Zn/P) ratio was found for treatment at 650 V and it equals 0.43 (wt%) | 0.20 (at%), while the minimum of that coefficient was recorded for the voltage of 450 V and equaling 0.26 (wt%) | 0.12 (at%). Performed studies have shown a possible way to form the porous coatings enriched with zinc by Plasma Electrolytic Oxidation in electrolyte containing concentrated phosphoric acid H3PO4with zinc nitrate Zn(NO3)2·6H2O.

Characterization of Catalytic Supports by Infrared Spectroscopy and ESCA

1982 ◽  
Vol 36 (4) ◽  
pp. 361-368 ◽  
Author(s):  
Larry F. Wieserman ◽  
David M. Hercules
Keyword(s):  
Infrared Spectroscopy ◽  
Surface Area ◽  
Elevated Temperatures ◽  
Silica Alumina ◽  
Free Hydroxyl ◽  
Ft Ir ◽  
Catalytic Supports ◽  
Silica And Titania

This study compares the properties of γ-alumina, silica, and titania using ESCA and in situ FT-IR. The FWHM's of the O1s and metal 2p ESCA peaks increased systematically from titania to γ alumina; the O1s/metal 2p ESCA peak area ratios were nearly equal for γ-alumina and silica. For titania, however, the value was half that obtained for γ-alumina. In situ FT-IR showed hydroxyl bands with increasing frequencies from titania to silica. Alumina and titania form carbonate-type structures after exposure to CO at elevated temperatures. Silica exhibited no additional bands after CO treatment that could be assigned to physically adsorbed CO or carbonate-type structures. At 100°C, there is a direct correlation between the specific surface area and the intensity of infrared absorbance of the free-hydroxyl and the hydrogen-bonded hydroxyl bands for silica. The intensities of the infrared bands due to matrix modes were not affected by surface area.

Characterization of the morphological modification induced by long term operations on phosphoric acid fuel cell (PAFC) electrodes

1990 ◽  
Vol 20 (5) ◽  
pp. 811-817 ◽  
Author(s):  
V. Alderucci ◽  
V. Recupero ◽  
L. Pino ◽  
R. Di Leonardo ◽  
D. L. Cocke ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Phosphoric Acid ◽  
Phosphoric Acid Fuel Cell ◽  
Morphological Modification

Characterization of liquefied products from corn stalk and its biomass components by polyhydric alcohols with phosphoric acid

2019 ◽  
Vol 215 ◽  
pp. 170-178 ◽  
Author(s):  
Yan Zhang ◽  
Zhong Liu ◽  
Haitang Liu ◽  
Lanfeng Hui ◽  
Huimei Wang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Corn Stalk ◽  
Polyhydric Alcohols ◽  
Biomass Components

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 Zeolite from Glass by Hydrothermal Processing

2013 ◽  
Vol 761 ◽  
pp. 91-94
Author(s):  
Masato Tsujiguchi ◽  
Tadashi Kobashi ◽  
Junji Kanbara ◽  
Yasuhiko Utsumi ◽  
Nobuaki Kakimori ◽  
...  
Keyword(s):  
Coal Fly Ash ◽  
Soda Lime ◽  
Xrd Analysis ◽  
Alkali Metal Hydroxide ◽  
High Tech ◽  
Soda Lime Glass ◽  
Production Volume ◽  
Silica Alumina ◽  
Plasma Displays

Zeolite is a microporous aluminosilicate material with uniform pore size of less than 2 nm and chemical, mechanical, and thermal stability. In general zeolite is synthesized from silica, alumina, mineralizer (alkali metal hydroxide and fluoride) and water. Recently it has been reported that various zeolites is synthesized from soda-lime glass, slag and coal fly ash as silica and alumina source. On the other hand, the production volume of various kinds of high-quality glass which are utilized for high-tech products such as liquid crystal displays and plasma displays is rapidly increasing. The purpose in this study is to synthesize a zeolite from crushed aluminoborosilicate glasses which is used as LCD panels glass substrate. According to the XRD analysis, it was found that the synthesized sample had zeolite related structure. And the results of SEM observation of the products suggest that the zeolite structure was obtained as well as XRD results. It was thought that zeolite was successfully synthesized from the glass by this synthetic processing.

Isolation and characterization of some hydroxy fatty and phosphoric acid esters of 10-hydroxy-2-decenoic acid from the royal jelly of honeybees (Apis mellifera)

Lipids ◽  
2005 ◽  
Vol 40 (8) ◽  
pp. 833-838 ◽  
Author(s):  
Naoki Noda ◽  
Kazue Umebayashi ◽  
Takafumi Nakatani ◽  
Kazumoto Miyahara ◽  
Kaori Ishiyama
Keyword(s):  
Apis Mellifera ◽  
Phosphoric Acid ◽  
Royal Jelly ◽  
Decenoic Acid ◽  
Isolation And Characterization ◽  
Acid Esters
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