A Comparative Study of Different Al-based Solid Acid Catalysts for Catalytic Dehydration of Ethanol

Kamsuwan, Tanutporn; Jongsomjit, Bunjerd

doi:10.4186/ej.2016.20.3.63

Cited by 18 publications

(12 citation statements)

References 28 publications

(36 reference statements)

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“…Finally, the feed and product compositions at reactor effluent were detected by using Shimadzu gas chromatography (GC 8A) with flame ionization detector (FID) using DB-5 capillary column. The reaction testing system was also demonstrated by Kamsuwan and Jongsomjit 27) .…”

Section: Ethanol Dehydration Reactionmentioning

confidence: 92%

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Tresatayawed

Glinrun²,

Autthanit

et al. 2020

J. Oleo Sci.

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IntroductionNowadays, the renewable energy resource such as solar, wind and biomass has become the most important energy sources due to its environmentally friendly, energy efficiency and reduction of harmful waste. Among energy resource, biomass has been recognized as one of the most utilization resources to provide the platform of chemical in various industries 1−3) . Besides, it has been interesting for many researches due to environmental concern about the emission of greenhouse gas from burning of fossil fuel (coal, oil and gas) and reducing of non-renewable feedstock supply in future. Recently, many researchers have played

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Section: Ethanol Dehydration Reactionmentioning

confidence: 92%

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Tresatayawed

Glinrun²,

Autthanit

et al. 2020

J. Oleo Sci.

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“…Moreover, the ability of H-ZSM-5 to catalyze the dehydration of ethanol to ethylene at low temperatures (200–300 °C) has made it commercially valuable and promising for further improvement in its efficiency. ZSM-5 zeolite catalysts treated by dealumination or desilication and modified with phosphorous or lanthanum have been reported. − For example, Xin et al (2014) post-treated ZSM-5 zeolite powder by desilication with sodium hydroxide, dealumination with oxalic acid, or both in a sequential way to finely tune zeolite catalysts in a hierarchical porous structure with varying acidities Table summarizes the ability of catalysts to dehydrate ethanol to ethylene.…”

Section: Introductionmentioning

confidence: 99%

Ethylene Formation from Ethanol Dehydration Using ZSM-5 Catalyst

2017

ACS Omega

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Catalysts prepared for ethanol dehydration in a fixed-bed reactor acted as strong active acidic catalysts under reaction conditions at lower temperatures. Experimental conditions including the catalyst type [active aluminum oxide (γ-Al 2 O 3 ) and ZSM-5 zeolite catalyst modified using two-stage through dealumination or desilication and by using the impregnation method with phosphorous and lanthanum], weight hourly space velocity (WHSV), ethanol concentration, and reaction temperature were investigated to obtain optimal reaction conditions. The catalysts were characterized using the Brunauer–Emmett–Teller method, temperature-programmed desorption of ammonia gas, thermogravimetric analysis, X-ray photoelectron spectroscopy, and X-ray diffraction. The results revealed that the ethylene yield and selectivity were 98.5 and 100%, respectively, for the ZSM-5 zeolite catalyst modified through dealumination at a temperature of 220 °C and WHSV of 2.5 h –1 when the ethanol concentration was 95%. The ethylene yield and selectivity were 94.3 and 94.4%, respectively, for the ZSM-5 zeolite catalyst modified using phosphorous at a temperature of 240 °C and WHSV of 1.5 h –1 when the ethanol concentration was 20%. Both of these catalysts were the most favorable among all prepared catalysts.

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“…As seen in Table 3, it indicated that the TiO 2 -SG exhibited lower amount of acid site than the TiO 2 -SV. However, with tungsten loading on both supports, it showed signi cant increase in weak and total acid sites for both WO 3 /TiO 2 -SG and WO 3 /TiO 2 -SV catalysts, which is necessary for enhancing the production of ethylene and DEE [38,39]. In addition, it can be observed that the WO 3 /TiO 2 -SV catalyst exhibited the highest amount of total acid sites at 3645 µmol/g cat.…”

Section: International Journal Of Chemical Engineeringmentioning

confidence: 93%

Ethanol Dehydration over WO₃/TiO₂Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods

Tresatayawed

Glinrun²,

Jongsomjit

2019

International Journal of Chemical Engineering

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The present study aims to investigate the catalytic ethanol dehydration to higher value products including ethylene, diethyl ether (DEE), and acetaldehyde. The catalysts used for this reaction were WO3/TiO2 catalysts having W loading of 13.5 wt.%. For a comparative study, the TiO2 supports employed were varied by two different preparation methods including the sol-gel and solvothermal-derived TiO2 supports, denoted as TiO2-SG and TiO2-SV, respectively. It is obvious that the different preparation methods essentially altered the physicochemical properties of TiO2 supports. It was found that the TiO2-SV exhibited higher surface area and pore volume and larger amounts of acid sites than those of TiO2-SG. As a consequence, different characteristics of support apparently affected the catalytic properties of WO3/TiO2 catalysts. As expected, both catalysts WO3/TiO2-SG and WO3/TiO2-SV exhibited increased ethanol conversion with increasing temperatures from 200 to 400°C. It appeared that the highest ethanol conversion (ca. 88%) at 400°C was achieved by the WO3/TiO2-SV catalysts due to its high acidity. It is worth noting that the presence of WO3 onto TiO2-SV yielded a remarkable increase in DEE selectivity (ca. 68%) at 250°C. In summary, WO3/TiO2-SV catalyst is promising to convert ethanol into ethylene and DEE, having the highest ethylene yield of ca. 77% at 400°C and highest DEE yield of ca. 26% at 250°C. These can be attributed to proper pore structure, acidity, and distribution of WO3.

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A Comparative Study of Different Al-based Solid Acid Catalysts for Catalytic Dehydration of Ethanol

Cited by 18 publications

References 28 publications

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Ethylene Formation from Ethanol Dehydration Using ZSM-5 Catalyst

Ethanol Dehydration over WO₃/TiO₂Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods

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A Comparative Study of Different Al-based Solid Acid Catalysts for Catalytic Dehydration of Ethanol

Cited by 18 publications

References 28 publications

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Pd Modification and Supporting Effects on Catalytic Dehydration of Ethanol to Ethylene and Diethyl Ether over W/TiO<sub>2</sub> Catalysts

Ethylene Formation from Ethanol Dehydration Using ZSM-5 Catalyst

Ethanol Dehydration over WO3/TiO2Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods

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Ethanol Dehydration over WO₃/TiO₂Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods