Sol-gel preparation and transport properties of a tin oxide

1990 ◽  
Vol 9 (12) ◽  
pp. 1383-1388 ◽  
Author(s):  
J. C. Giuntini ◽  
W. Granier ◽  
J. V. Zanchetta ◽  
A. Taha
2001 ◽  
Vol 13 (11) ◽  
pp. 4355-4361 ◽  
Author(s):  
F. Morazzoni ◽  
C. Canevali ◽  
N. Chiodini ◽  
C. Mari ◽  
R. Ruffo ◽  
...  

2009 ◽  
Vol 48 (3) ◽  
pp. 30301 ◽  
Author(s):  
B. Benrabah ◽  
A. Bouaza ◽  
S. Hamzaoui ◽  
A. Dehbi
Keyword(s):  
Sol Gel ◽  

2007 ◽  
Vol 515 (17) ◽  
pp. 6691-6697 ◽  
Author(s):  
P.G.L. Baker ◽  
R.D. Sanderson ◽  
A.M. Crouch

2018 ◽  
Vol 9 (1) ◽  
pp. 133-139
Author(s):  
Waleed S. Mohammed ◽  
Ahmed H. El-Shazly ◽  
Marwa F. Elkady ◽  
Masahiro Ohshima

Introduction: The utilization of biodiesel as an alternative fuel is turning out to be progressively famous these days because of worldwide energy deficiency. The enthusiasm for utilizing Jatropha as a non-edible oil feedstock is quickly developing. The performance of the base catalyzed methanolysis reaction could be improved by a continuous process through a microreactor in view of the high mass transfer coefficient of this technique. Materials & Methods: Nanozirconium tungstovanadate, which was synthetized using sol-gel preparation method, was utilized in a complementary step for biodiesel production process. The prepared material has an average diameter of 0.066 &µm. Results: First, the NaOH catalyzed methanolysis of Jatropha oil was investigated in a continuous microreactor, and the efficient mixing over different mixers and its impact on the biodiesel yield were studied under varied conditions. Second, the effect of adding the nanocatalyst as a second stage was investigated. Conclusion: The maximum percentage of produced methyl esters from Jatropha oil was 98.1% using a methanol/Jatropha oil molar ratio of 11 within 94 s using 1% NaOH at 60 &°C. The same maximum conversion ratio was recorded with the nanocatalyst via only 0.3% NaOH.


Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1761
Author(s):  
Izabela Rutkowska ◽  
Jakub Marchewka ◽  
Piotr Jeleń ◽  
Mateusz Odziomek ◽  
Mateusz Korpyś ◽  
...  

Aluminum oxide is one of the most commonly used materials in the industry. It is used in the field of catalysis, refractories, and optics. Despite the fact that there are many techniques available, there is still a great challenge in obtaining a material with desired and designed properties. Nevertheless, there is a great flexibility in making customized alumina materials with desired physicochemical properties synthesized by sol–gel methods. This work consists in characterizing the physicochemical properties of sol–gel synthesized aluminum oxide using different sol–gel preparation routes. Three different sols were obtained by using organic precursors and underwent thermal treatment. The structure (Middle Infrared Spectroscopy, Diffused Reflectance Infrared Spectroscopy, X-ray Diffraction, Magic Angle Spinning Nuclear Magnetic Resonance) and microstructure (Scanning Electron Microscopy with Electron Dispersive Spectroscopy) tests of the materials were carried out. The specific surface area was determined by using the Brunauer–Emmett–Teller (BET) method. Thermal analysis was performed for all the powders, in order to analyze the specific temperature of materials transformation.


2008 ◽  
Vol 254 (20) ◽  
pp. 6547-6553 ◽  
Author(s):  
Tong Jun Liu ◽  
Zheng Guo Jin ◽  
Li Rui Feng ◽  
Tao Wang

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