Influence of Fe on the thermal stability and catalysis of SBA-15 mesoporous molecular sieves

2005 ◽  
Vol 86 (1-3) ◽  
pp. 335-340 ◽  
Author(s):  
X.Q. Wang ◽  
H.L. Ge ◽  
H.X. Jin ◽  
Y.J. Cui
Keyword(s):  
Thermal Stability ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves

scholarly journals Preparation, characterization and evaluation of x-MoO3/Al-SBA-15 catalysts for biodiesel production

2021 ◽  
Author(s):  
Joyce S. B. Figueiredo ◽  
Bruno T. S. Alves ◽  
Vitória A. Freire ◽  
José J. N. Alves ◽  
Bianca V. S. Barbosa
Keyword(s):  
Thermal Stability ◽  
Soybean Oil ◽  
Molecular Sieves ◽  
High Surface ◽  
International Standards ◽  
Mesoporous Molecular Sieves ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Textural Characteristic

Abstract Biodiesel is an alternative source of renewable energy that can be produced by a transesterification of vegetable oils. Mesoporous molecular sieves, such as SBA-15, due to high surface area and thermal stability are promising precursors for heterogeneous catalysts in the transesterification reaction. In this work, Al-SBA-15 precursor was obtained by direct hydrothermal synthesis, impregnated with different MoO3 contents (5, 10 and 15 wt%) by the pore saturation method, and evaluated as heterogeneous catalyst in the production of biodiesel from a transesterification of soybean oil with methanol. Al-SBA-15 precursor as well as MoO3/Al-SBA-15 catalyst were characterized for its structural characteristic by X-ray diffraction, textural characteristic by N2 adsorption analysis, and thermal stability by thermogravimetric analysis. An experimental planning 22 + 3 CtPt was used to evaluate the influence of MoO3 content and reaction time on biodiesel yield from soybean oil and methanol. The biodiesel content in the final product was obtained by gas chromatography. An average biodiesel yield of 96% was obtained with the catalyst 10%MoO3/Al-SBA-15 under the following reaction conditions: 20:1 methanol/soybean oil molar ratio, and 3 wt% of catalyst loading at 150 °C in 3 h. After five consecutive reaction cycles, the biodiesel yield decreased by about 34%. The density and acidity of the biodiesel produced are within the specified values for commercialization according to international standards. Graphical abstract

Improved thermal stability of mesoporous molecular sieves by vapor infiltration treatment

2003 ◽  
Vol 63 (1-3) ◽  
pp. 105-112 ◽  
Author(s):  
Shunsuke Tanaka ◽  
Norikazu Nishiyama ◽  
Yoshiaki Oku ◽  
Yasuyuki Egashira ◽  
Korekazu Ueyama
Keyword(s):  
Thermal Stability ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Thermal Stability Of ◽  
Vapor Infiltration

Mesoporous molecular sieves: alkylation of anisole using tert-butylalcohol

2006 ◽  
Vol 110 (1-2) ◽  
pp. 39-45 ◽  
Author(s):  
P. Kamala ◽  
A. Pandurangan
Keyword(s):  
Molecular Sieves ◽  
Mesoporous Molecular Sieves

Cytochrome c immobilization into mesoporous molecular sieves

2000 ◽  
Vol 10 (5) ◽  
pp. 453-469 ◽  
Author(s):  
Lisa Washmon-Kriel ◽  
Victoria L Jimenez ◽  
Kenneth J Balkus
Keyword(s):  
Cytochrome C ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves

Synthesis and Characterization of V-SBA-1 Cubic Mesoporous Molecular Sieves

2001 ◽  
Vol 13 (1) ◽  
pp. 208-212 ◽  
Author(s):  
Lian-Xin Dai ◽  
Kenji Tabata ◽  
Eiji Suzuki ◽  
Takashi Tatsumi
Keyword(s):  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Synthesis And Characterization ◽  
Cubic Mesoporous

Effect of rehydration on the porosity of MCM-41 mesoporous molecular sieves

1999 ◽  
Vol 35 (1) ◽  
pp. 52-56
Author(s):  
F. M. Bobonich ◽  
Yu. G. Voloshina ◽  
L. A. Matkovskaya ◽  
V. N. Solomakha ◽  
Yu. G. Gol’tsov
Keyword(s):  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Mcm 41

Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

2014 ◽  
Vol 8 (1) ◽  
pp. 95-103 ◽  
Author(s):  
Shengping Wang ◽  
Changqing Ma ◽  
Yun Shi ◽  
Xinbin Ma
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Mcm 41
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