Catalytic dehydration of alcohols over alumina Mechanism of ether formation

Jain, J.R.; Pillai, C. N.

doi:10.1016/0021-9517(67)90260-6

Cited by 104 publications

(33 citation statements)

References 3 publications

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“…Alcohol dehydration to ethers is a second-order reaction that involves the adsorption of two alcohol molecules on neighboring active sites offering different acid-base properties [29,30]. One alcohol molecule adsorbs through the oxygen of the OH group on a Lewis acid site whereas the other alcohol molecule adsorbs on a basic site via the hydroxylic hydrogen.…”

Section: Catalytic Resultsmentioning

confidence: 99%

Side-chain alkylation of toluene with methanol on Cs-exchanged NaY zeolites: effect of Cs loading

et al. 2005

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The side-chain alkylation of toluene with methanol was studied on Cs-exchanged NaY zeolites containing up to 31% Cs (exchange degree, ED, up to 70%). Formation of styrene and ethylbenzene was significant only on Na(Cs)Y zeolites of ED higher than about 40%. Bimolecular side-chain alkylation reaction would require a proper surface geometric configuration of O d) -Cs + pairs that is achieved only on Cs-rich zeolites. In contrast, the side reaction forming carbon monoxide from methanol increases monotonically with increasing ED because it is essentially controlled by the basicity of the oxygen lattice.

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Section: Catalytic Resultsmentioning

confidence: 99%

Side-chain alkylation of toluene with methanol on Cs-exchanged NaY zeolites: effect of Cs loading

et al. 2005

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“…Striving to achieve high olefin selectivity, it would be desirable to further convert oxygenated compounds in the product mixture via deoxygenation (preferentially via a dehydration mechanism) to increase the yield of a hydrocarbon product. Acidic catalysts are useful in dehydration reactions of oxygenated products, particularly when the oxygenates are composed primarily of alcohols (Jain and Pillai, 1967). The tests were performed to determine if the heterogeneous acidic catalysts were active in converting the minor oxygenates along with the mixture containing a large amount of hydrocarbons, water, and unconverted CO and H 2 .…”

Section: Dual Reactor Arrangement For the Oxygenate Conversionmentioning

confidence: 99%

Direct syngas hydrogenation over a Co–Ni bimetallic catalyst: Process parameter optimization

Ramasamy

Gray

Job

et al. 2015

Chemical Engineering Science

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Low metal loading Co-Ni bimetallic catalyst for the CO hydrogenation/FTS. Very high olefin to paraffin ratio generated. The highest olefin to paraffin ratio of 8 was observed for C 3 hydrocarbon. Demonstrated dual bed configuration to convert oxygenates. a b s t r a c tThe syngas hydrogenation activity of the Co-Ni bimetallic catalyst containing total metal loading less than 10 wt% was prepared via a wet impregnation method and was studied with respect to the reaction temperature and the catalyst composition. Among the hydrocarbons generated, small olefinic compounds between C 2 and C 7 (up to 40%) were the highest in the product mixture. The olefin to paraffin ratio for C 3 hydrocarbon is around 8. For all variables tested, the product distribution contains up to 10% oxygenates along with the hydrocarbon compounds. An acidic alumina containing reactor was added followed by the Co-Ni containing reactor to demonstrate the deoxygenation of oxygenates generated from the FTS process to improve the small olefinic fraction and the overall carbon yield to the valuable products.

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“…In the case of alumina, it has been known since a long time that alcohol dehydration can take place on Lewis acid-base pairs generated on the alumina surface upon dehydration [135]. Regarding zeolites, different mechanisms involving a Brønsted acid site [136] or both a Brønsted acid site (H + ) and its adjacent Lewis base site (O 2− ) [137] have been proposed for DME formation from methanol.…”

Section: One-step Synthesis Of Dimethyl Ether (Dme) From Syngasmentioning

confidence: 99%

Advanced Catalysts Based on Micro‐ and Mesoporous Molecular Sieves for the Conversion of Natural Gas to Fuels and Chemicals

Martı́nez

Prieto

García‐Trenco

et al. 2010

Zeolites and Catalysis

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Catalytic dehydration of alcohols over alumina Mechanism of ether formation

Cited by 104 publications

References 3 publications

Side-chain alkylation of toluene with methanol on Cs-exchanged NaY zeolites: effect of Cs loading

Side-chain alkylation of toluene with methanol on Cs-exchanged NaY zeolites: effect of Cs loading

Direct syngas hydrogenation over a Co–Ni bimetallic catalyst: Process parameter optimization

Advanced Catalysts Based on Micro‐ and Mesoporous Molecular Sieves for the Conversion of Natural Gas to Fuels and Chemicals

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