Investigation of CuMnOx spinel catalyst for toluene oxidation

2021 ◽  
Vol 10 (4) ◽  
pp. 52-58
Author(s):  
Hien Tran Thị Thu ◽  
Thuy Ly Bich ◽  
Phuong Pham Thi Mai ◽  
Thang Le Minh
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Reduction Temperature ◽  
Gel Method ◽  
Oxygen Conditions ◽  
Reduction Capacity

CuMnOx spinel catalyst, prepared by the sol-gel method, and characterized by modern techniques such as XRD, BET, H2-TPR, EPR, were used to oxide toluene in the temperature range from 150oC to 400oC . Among,  the investigated catalysts as MnO2, CuO, and CuMnOx, the CuMnOx showed the highest catalytic activity. It converted 100% toluene to CO2 at 250oC in excessed oxygen conditions. The higher catalytic performance of CuMnOx than MnO2, CuO because of its higher specific surface area and its lower reduction temperature. The results also implied that the interaction between Cu and Mn could improve the reduction capacity of CuMnOx catalyst. In summary, the CuMnOx catalyst is a promising catalyst for toluene treatment.

scholarly journals Synthesis of Spherical Silica by Sol-Gel Method and Its Application as Catalyst Support

2011 ◽  
Vol 10 (2) ◽  
pp. 25
Author(s):  
Anirut Leksomboon ◽  
Bunjerd Jongsomjit
Keyword(s):  
Particle Size ◽  
Ethylene Glycol ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Weight Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Spherical Silica

In this present study, the spherical silica support was synthesized from tetraethyloxysilane (TEOS), water, sodium hydroxide, ethylene glycol and n-dodecyltrimethyl ammonium bromide (C12TMABr). The particle size was controlled by variation of the ethylene glycol co-solvent weight ratio of a sol-gel method preparation in the range of 0.10 to 0.50. In addition, the particle size apparently increases with high weight ratio of co-solvent, but the particle size distribution was broader. The standard deviation of particle diameter is large when the co-solvent weight ratio is more than 0.35 and less than 0.15. However, the specific surface area was similar for all weight ratios ranging from 1000 to 1300 m2/g. The synthesized silica was spherical and has high specific surface area. The cobalt was impregnated onto the obtained silica to produce the cobalt catalyst used for CO2 hydrogenation.</

Novel Al2O3–SiO2composite aerogels with high specific surface area at elevated temperatures with different alumina/silica molar ratios prepared by a non-alkoxide sol–gel method

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5611-5620 ◽  
Author(s):  
Xiaodong Wu ◽  
Gaofeng Shao ◽  
Xiaodong Shen ◽  
Sheng Cui ◽  
Ling Wang
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Elevated Temperatures ◽  
Inorganic Salt ◽  
Sol Gel ◽  
High Specific Surface Area ◽  
Gel Method ◽  
Molar Ratios ◽  
Composite Aerogels

We have developed a new sol–gel route to synthesise Al2O3–SiO2composite aerogels with different alumina/silica (Al/Si) molar ratios using an inexpensive inorganic salt.

Cerium–zirconium mixed oxide synthesized by sol-gel method and its effect on the oxygen vacancy and specific surface area

2021 ◽  
pp. 122752
Author(s):  
Pablo Teles Aragão Campos ◽  
Claudinei Fabiano Oliveira ◽  
João Pedro Vieira Lima ◽  
Daniele Renata de Queiroz Silva ◽  
Sílvia Cláudia Loureiro Dias ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Mixed Oxide ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Novel 0D-nanocarbon-silica ceramic composites: sol–gel synthesis and high-temperature evolution

2020 ◽  
Vol 49 (21) ◽  
pp. 7144-7154 ◽  
Author(s):  
Alexander Ott ◽  
Simone Rogg ◽  
Stefan Lauterbach ◽  
Hans-Joachim Kleebe ◽  
Christian Hess ◽  
...  
Keyword(s):  
High Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Ceramic Composites ◽  
High Specific Surface Area ◽  
Gel Method ◽  
Sol Gel Synthesis ◽  
Silica Ceramic

Novel mesoporous, high specific surface area (up to 562 m2 g−1) 0D-nanocarbon-based silicon-containing ceramic composites were produced by a straightforward sol–gel method followed by polymer-to-ceramic transformation.

The Preparation of BaTi4O9 by Sol-Gel Method

2016 ◽  
Vol 852 ◽  
pp. 272-277 ◽  
Author(s):  
Zhao Rong Wei ◽  
Chao Yang Shi ◽  
Bin Shen ◽  
Ming Fan ◽  
Cheng Wang
Keyword(s):  
Thermal Analysis ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Tem Analysis ◽  
Gel Method ◽  
Sol Gel Method ◽  
Different Temperatures

To promote the application of BaTi4O9 in higher-end fields, BaTi4O9 precursor has been prepared with sol-gel method (SGM. The objective products have been obtained at different temperatures and SSR-BaTi4O9 samples has been prepared for compare experiments. The studies of thermal analysis, XRD analysis, TEM analysis, specific surface area analysis, DRS analysis and FS analysis show: the crystalline of the product obtained by SGM is more purity than the product obtained by SSR; The SGM600 sample is amorphous, which can be used as an optical catalyst because of the maximum specific surface area; The SGM1000 sample is the most pure, uniform and complete in crystal.

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