Effects of ethylene glycol addition on the properties of Ru/Al2O3 catalyst prepared by sol-gel method

1996 ◽  
Vol 36 (1-2) ◽  
pp. 41-49 ◽  
Author(s):  
J. C. Yang ◽  
Y. G. Shul
Keyword(s):  
Ethylene Glycol ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Al2o3 Catalyst

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.</

Silica Nanoparticles Synthesized from Maize Cob using Modified Sol-Gel Method

2020 ◽  
Vol 15 (2) ◽  
pp. 22-29
Author(s):  
Jeleel Adekunle Adebisi ◽  
Johnson Olumuyiwa Agunsoye ◽  
Sefiu Adekunle Bello ◽  
M. Haris ◽  
M. Senthilkumar ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Silica Nanoparticles ◽  
Amorphous Silica ◽  
Sol Gel ◽  
Agricultural Wastes ◽  
Gel Method ◽  
Sol Gel Method ◽  
Maize Cob ◽  
Pre Treatment ◽  
Maize Cobs

Silica has found applications in many industries. Its production from agricultural wastes has been reported but with marked agglomeration of the final product. This work investigated production of silica nanoparticles from maize cob and effect of sol-gel modification with ethylene glycol on degree of agglomeration was also examined. This work also explored the effects of acid pre/post calcination treatments of the maize cob. Maize cob was treated with HCl prior to and after calcination. Using sol-gel method, silica was produced from both untreated and treated maize cobs. Ethylene glycol was also added to sodium silicate prior to precipitation of silica gel for modification of the conventional sol-gel procedure. The results showed that acid treatments affect the purity of silica nanoparticles. Ethylene glycol was observed to reduce degree of agglomeration in silica nanoparticles production from agricultural wastes. Silica nanoparticles of sizes between 5 and 50 nm were successfully synthesized. Keywords: Agricultural Wastes, Maize cob, Amorphous silica, Agglomeration, Sol-gel, Acid pre-treatment.

The role of H2O and oxidized copper species in methanol steam reforming on a Cu/CeO2/Al2O3 catalyst prepared by one-pot sol–gel method

2011 ◽  
Vol 102 (3-4) ◽  
pp. 387-394 ◽  
Author(s):  
Maria Turco ◽  
Giovanni Bagnasco ◽  
Claudia Cammarano ◽  
Luca Micoli ◽  
Maurizio Lenarda ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Sol Gel ◽  
Methanol Steam Reforming ◽  
One Pot ◽  
Copper Species ◽  
Gel Method ◽  
Sol Gel Method ◽  
Al2o3 Catalyst

Enhanced one-pot selective conversion of cellulose to ethylene glycol over NaZSM-5 supported metal catalysts

2021 ◽  
Author(s):  
Sreejith Sreekantan ◽  
Arun Arunima Kirali ◽  
Banu Marimuthu
Keyword(s):  
Ethylene Glycol ◽  
Sol Gel ◽  
Metal Catalysts ◽  
Supported Metal Catalysts ◽  
Reaction Conditions ◽  
One Pot ◽  
Cellulose Conversion ◽  
Moderate Reaction ◽  
Gel Method ◽  
Sol Gel Method

The mesopores/micropores NaZSM-5 was synthesised by sol–gel method. The 5%Al–8%Ni–25%W/NaZSM-5 catalyst exhibited the highest cellulose conversion of 100% with EG yield as high as 89% (C mol%) at moderate reaction conditions which is highly applicable in polymer Industry.

scholarly journals Cu/SiO2 Catalysts Prepared by the Sol-Gel Method for Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

2011 ◽  
Vol 32 (6-8) ◽  
pp. 957-969 ◽  
Author(s):  
Ling LIN ◽  
Pengbin PAN ◽  
Zhangfeng ZHOU ◽  
Zhaoji LI ◽  
Jinxia YANG ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dimethyl Oxalate

Copper Exchanged SiO2/Al2O3 Catalyst Prepared by Sol-Gel Method for Intermolecular Hydroamination of Terminal Alkynes

2013 ◽  
Vol 2 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Swati L. Pandhare ◽  
Trupti V. Kotbagi ◽  
Mohan K. Dongare ◽  
Shubhangi B. Umbarkar
Keyword(s):  
Sol Gel ◽  
Terminal Alkynes ◽  
Gel Method ◽  
Sol Gel Method ◽  
Al2o3 Catalyst

scholarly journals Degradation of Ethylene Glycol Through Photo-Fenton Heterogeneous System

2019 ◽  
Vol 18 (35) ◽  
pp. 91-109
Author(s):  
Alba Nelly Ardila-Arias ◽  
Eliana Berrío-Mesa ◽  
Erasmo Arriola-Villaseñor ◽  
William Fernando Álvarez-Gómez ◽  
José Alfredo Hernández-Maldonado ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Heterogeneous System ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Gel Method ◽  
Doped Tio2 ◽  
Sol Gel Method ◽  
Iron Doped ◽  
Initial Ph ◽  
Doped Materials

This work describes the ethylene glycol degradation in a photo-Fenton heterogeneous system. Iron-doped TiO2 photocatalysts prepared by different methods (incipient wet impregnation and sol-gel method), as well as the corresponding un-doped material were examined in this process. Different values of initial pH and H2O2 concentration were tested during the experiments. A lower photoactivity was observed for the un-doped materials than for the Fe-doped materials. Optimum results of initial pH and H2O2 concentrations were found to be 3.0 and 1,000 mg/L, respectively.  Furthermore, the highest degradation percentage of ethylene glycol (61 %) was achieved for the material synthetized by sol-gel method. Such catalytic performance is explained on the basis of structural/morphological and electronic characterization results, reached by XRD, UV-vis DRS and XPS techniques. To the best of our knowledge, this is the first report related with the ethylene glycol degradation using Iron-doped TiO2 in a photo-Fenton heterogeneous system.

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