Ethanol dehydration on alumina catalysts II. The infrared study on adsorption of diethyl ether over alumina

1968 ◽  
Vol 10 (2) ◽  
pp. 128-133 ◽  
Author(s):  
H ARAI
Keyword(s):  
Diethyl Ether ◽  
Ethanol Dehydration ◽  
Infrared Study ◽  
Alumina Catalysts

Exergy, economic, and environmental assessment of ethanol dehydration to diesel fuel additive diethyl ether

Fuel ◽  
2022 ◽  
Vol 308 ◽  
pp. 121918
Author(s):  
Mortaza Aghbashlo ◽  
Hajar Rastegari ◽  
Hassan S. Ghaziaskar ◽  
Homa Hosseinzadeh-Bandbafha ◽  
Mohammad Hossein Nadian ◽  
...  
Keyword(s):  
Diethyl Ether ◽  
Environmental Assessment ◽  
Diesel Fuel ◽  
Fuel Additive ◽  
Ethanol Dehydration

Kinetics of individual steps in reaction network ethanol-diethyl ether-ethylene-water on alumina

1986 ◽  
Vol 51 (4) ◽  
pp. 763-773 ◽  
Author(s):  
Vladimír Morávek ◽  
Miloš Kraus
Keyword(s):  
Diethyl Ether ◽  
Reaction Network ◽  
Reaction Rates ◽  
Rate Equations ◽  
Initial Reaction ◽  
Ethanol Dehydration ◽  
Partial Pressures ◽  
Type Rate ◽  
Kinetics Of ◽  
Hydrolysis Of

The rates of single reactions have been measured at 250 °C in the complex reaction of ethanol dehydration to ethylene and to diethyl ether involving also hydrolysis of the ether, its disproportionation to ethanol and ethylene and its dehydration to ethylene. The found dependences of the initial reaction rates on partial pressures of the reactants were correlated by semiempirical Langmuir-Hinshelwood type rate equations.

scholarly journals Catalytic Dehydration of Ethanol over W/TiO2 Catalysts Having Different Phases of Titania Support

2019 ◽  
Vol 15 (1) ◽  
pp. 96-103 ◽  
Author(s):  
Pongsatorn Kerdnoi ◽  
Chaowat Autthanit ◽  
Nithinart Chitpong ◽  
Bunjerd Jongsomjit
Keyword(s):  
Pore Structure ◽  
Diethyl Ether ◽  
Reaction Temperature ◽  
Catalytic Properties ◽  
Chemical Properties ◽  
Major Product ◽  
Ethanol Dehydration ◽  
Physico Chemical ◽  
Tio2 Support ◽  
Ether Yield

This study aims to investigate the catalytic behaviors on W/TiO2 catalysts having different phases of TiO2 towards catalytic dehydration of ethanol to higher value products including ethylene, diethyl ether, and acetaldehyde. In fact, TiO2 support with different crystalline phases can result in differences of physico-chemical properties of the catalyst. Therefore, the present work reports on the catalytic behaviors that were altered with different phases of TiO2 in catalytic ethanol dehydration to diethyl ether or ethylene as a major product. To prepare the catalysts, three different phases [anatase (A), rutile (R), and mixed phases (P25)] of TiO2 supports were impregnated with 10 wt% of tungsten (W). It was found that the W/TiO2-P25 catalyst revealed higher activity among other catalysts. At 300 °C, all catalysts can produce the diethyl ether yield of 24.1%, 22.8%, and 10.6% for W/TiO2-P25, W/TiO2-A, and W/TiO2-R catalysts, respectively. However, when the reaction temperature was increased to 400°C, ethylene is the major product. The W/TiO2-P25 and W/TiO2-A catalysts render the ethylene yield of 60.3% and 46.2%, respectively, whereas only 15.9% is obtained from W/TiO2-R catalyst. The most important parameter influencing their catalytic properties appears to be the proper pore structure, acidity, and distribution of W species. Copyright © 2019 BCREC Group. All rights reserved 

scholarly journals A Comparative Study of Solvothermal and Sol-Gel-Derived Nanocrystalline Alumina Catalysts for Ethanol Dehydration

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Mingkwan Wannaborworn ◽  
Piyasan Praserthdam ◽  
Bunjerd Jongsomjit
Keyword(s):  
Solvothermal Method ◽  
Sol Gel ◽  
Strong Acid ◽  
Ethanol Conversion ◽  
Ethanol Dehydration ◽  
Excellent Performance ◽  
Preparation Methods ◽  
Commercial Alumina ◽  
Ethylene Selectivity ◽  
Alumina Catalysts

The ethanol dehydration to ethylene over alumina catalysts prepared by solvothermal and sol-gel methods was investigated. Also, a commercial alumina was used for comparison purposes. The results showed that the catalytic activity depends on the properties of catalyst derived from different preparation methods and reaction temperature. The alumina synthesized by solvothermal method exhibited the highest activity. This can be attributed to the higher surface area and larger amount of acid site, especially the ratio of weak/strong acid strength as determined by N2physisorption and NH3-TPD studies. The solvothermal-derived catalyst exhibited an excellent performance with complete ethanol conversion and 100% selectivity to ethylene at 350°C in comparison with other ones. In addition, we further studied the catalytic dehydration of alumina catalyst modified with Fe. The presence of 10 wt.% Fe decreased both conversion and ethylene selectivity. However, the acetaldehyde selectivity apparently increased. It was related to the dehydrogenation pathway that takes place on Fe species.

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