Catalytic and kinetic study of methanol dehydration to dimethyl ether

Hosseininejad, S.; Afacan, Artin; Hayes, Robert E.

doi:10.1016/j.cherd.2011.10.007

Cited by 97 publications

(58 citation statements)

References 10 publications

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“…In order to suppress the dehydration to olefins reaction and increase the selectivity towards the DME, weak or moderate acidity catalysts are desirable as in the Al 2 O 3 . Methanol dehydration is known to take place on Lewis acid-pair sites and its rate increases as the surface Lewis acidity increases [11]. It was well reported that γ-Al 2 O 3 , a typical Lewis acid catalyst and also the η-Al 2 O 3 used in the study, can catalyse dehydration of MTD [10].…”

Section: Introductionmentioning

confidence: 99%

“…It was well reported that γ-Al 2 O 3 , a typical Lewis acid catalyst and also the η-Al 2 O 3 used in the study, can catalyse dehydration of MTD [10]. Several reaction mechanisms have been presented for methanol dehydration on acid catalysts [11,12]. Either Brønsted acid sites or Lewis acid-base pair sites are believed to play a role in such reaction and, generally, the stronger the acid sites the more active the catalysts, however, it should be remembered that as far as Brønsted sites are concerned, their…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism based on the Lewis acidity, on the other hand, requires adjacent acid-base pair sites to provide the reaction between the adsorbed alcohol molecule on an acidic site and an adsorbed alkoxide anion on a basic site [11].…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Investigation of η-Al2O3 Catalyst for Dimethyl Ether Production

Osman

Abu‐Dahrieh

2018

Catal Lett

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Herein, kinetic modelling and kinetic parameters were used to study methanol dehydration to dimethyl ether reaction and revealed that the best model to fit the experimental data was the Bercic model. The dehydration reaction undergoes dissociative adsorption Langmuir-Hinshelwood mechanism of methanol on the alumina catalyst surface, with the calculated value of the activation energy was 136.7 kJ mol −1 . Moreover, the effect of different kinetic parameters such as the catalyst weight and methanol concentration or water in the feed on the catalytic performance of η-Al 2 O 3 was examined in a fixed bed reactor under the reaction conditions where the temperature ranged from 180 to 350 °C with a WHSV = 12.1 h −1 . Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetic Investigation of η-Al2O3 Catalyst for Dimethyl Ether Production

Osman

Abu‐Dahrieh

2018

Catal Lett

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“…Methanol is one of the main CO2 hydrogenation products 2,6 which can be directly dehydrated to DME in a single batch reaction. Both these molecules are valuable alternative fuels 2,[7][8][9] and they are also used as feedstocks and intermediates for producing various chemicals and as energy carriers for fuel cells 7,[10][11][12] . Methanol can typically be produced from synthesis gas at a pressure between 50-100 bar and at a temperature between 200-300 °C 6,[12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

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The self-archived postprint version of this journal article is available at Linköping University Institutional Repository (DiVA): http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147297 N.B.: When citing this work, cite the original publication.Atakan, A., Erdtman, E., Mäkie, P., Ojamäe, L., Odén, M., (2018) ABSTRACT: Time evolution of catalytic CO2 hydrogenation to methanol and dimethyl ether (DME) has been investigated in a hightemperature high-pressure reaction chamber where products accumulate over time. The employed catalysts are based on a nano-assembly composed of Cu nanoparticles infiltrated into a Zr doped SiOx mesoporous framework (SBA-15): Cu-Zr-SBA-15. The CO2 conversion was recorded as a function of time by gas chromatography-mass spectrometry (GC-MS) and the molecular activity on the catalyst's surface was examined by diffuse reflectance in-situ Fourier transform infrared spectroscopy (DRIFTS). The experimental results showed that after 14 days a CO2 conversion of 25% to methanol and DME was reached when a DME selective catalyst was used which was also illustrated by thermodynamic equilibrium calculations. With higher Zr content in the catalyst, greater selectivity for methanol and a total 9.5 % conversion to methanol and DME was observed, yielding also CO as an additional product. The time evolution profiles indicated that DME is formed directly from methoxy groups in this reaction system. Both DME and methanol selective systems show the thermodynamically highest possible conversion.

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“…It should be noted that in [20] gas and liquid rates through stripping and rectifying zones are constant and these rates change in the reactive zone because the heat of reaction vaporizes some liquid. Since the heat of reaction (1) is negligible [19], we assume constant liquid and gas rates all through the column. It should be noted that a more rigorous model will most likely give quantitatively different but qualitatively similar results.…”

Section: Process Modelmentioning

confidence: 99%

Distributed optimal control of a Dimethyl Ether (DME) catalytic distillation column

Moghadam

Aksikas

Dubljević

et al. 2011

IEEE Conference on Decision and Control and European Control Conference

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This contribution addresses the development of a Linear Quadratic regulator (LQ) for controlling concentration profiles along a catalytic distillation column which is modelled by a set of coupled hyperbolic Partial Differential and Algebraic Equations (PDAEs). The methodology is based on an infinitedimensional representation of the system and solving the related Operator Riccati Equation (ORE). The performance of the designed control policy is assessed through a numerical simulation.

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Catalytic and kinetic study of methanol dehydration to dimethyl ether

Cited by 97 publications

References 10 publications

Kinetic Investigation of η-Al2O3 Catalyst for Dimethyl Ether Production

Kinetic Investigation of η-Al2O3 Catalyst for Dimethyl Ether Production

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Distributed optimal control of a Dimethyl Ether (DME) catalytic distillation column

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