Production of hydrogen from dimethyl ether

Galvita, Vladimir; Semin, G. L.; Belyaev, V. D.; Yurieva, T. M.; Sobyanin, V. A.

doi:10.1016/s0926-860x(01)00540-3

Cited by 176 publications

(87 citation statements)

References 20 publications

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“…It also means that DME has excellent combustion characteristics. In addition, since the physical properties of DME are similar to liquefi ed petroleum gas 4 and given its low saturation steam pressure, high heating value. It has been speculated that DME could be used as domestic fuel 5 .…”

Section: Introductionmentioning

confidence: 99%

Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

Bai¹,

Ma²,

Zhang³

et al. 2013

Polish Journal of Chemical Technology

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The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase. In order to validate the proposed model, the simulation results have been compared with the available data from a set of industrial production equipment with a production capacity of 200 000 tonnes per annum. A comparison between the calculated and measured results has proved that these results are satisfactory. The bed height and the volume of the catalytic bed are calculated aim at one million t/a DME yields and while taking account of high-purity DME production. After discussing the infl uence of feed stage location and refl ux ratio for DME product purity, the suitable unit operation conditions are chosen. Accordingly, accurate process simulation results provide the basis and guidance for an improvement and development of the similar industrial device.

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Section: Introductionmentioning

confidence: 99%

Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

Bai¹,

Ma²,

Zhang³

et al. 2013

Polish Journal of Chemical Technology

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“…[20] DME is also considered as a potential fuel for the generation of hydrogen. [21][22][23][24][25][26][27][28] Recently, we reported that Mo 2 C prepared on carbon Norit is an effective and stable catalyst, not only in the reforming of ethanol [29,30] and methanol, [31,32] but also for the production of hydrogen from DME. [33] On 10 % Mo 2 C/Norit, complete conversion of dimethyl ether was attained at 873-923 K. Adding water to DME slightly improved the production of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Production of Hydrogen from Dimethyl Ether over Supported Rhodium Catalysts

2009

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Infrared (IR) spectroscopy revealed that dimethyl ether (DME) undergoes partial dissociation on pure and rhodium‐containing CeO2 at 300 K to yield methoxy and methyl species. This process is promoted by the presence of rhodium. By means of thermal desorption measurements (TPD), the adsorption of DME on Rh/CeO2 at 300 K and subsequent decomposition of DME (Tp≈370 K), releasing H2, CO, CO2, and CH4, with Tp between 420 and 673 K, were ascertained. Rh/CeO2 is an effective catalyst for the decomposition of DME to give H2 (29–35 %), CO (27–30 %) and CH4 (32–38 %) as major products with complete conversion at 673–723 K. Adding water to DME changed the product distribution and increased the selectivity of H2 formation from 30–35 % to 58 % at 723 K. In situ IR spectroscopy showed absorption bands of CO at 2034 and 1893 cm−1 during the reaction at 673–773 K. Deactivation of the catalyst did not occur at 773 K during the time measured (approximately 10 h). Rh deposited on carbon Norit also exhibited a high activity towards the decomposition of DME, but the selectivity towards hydrogen was lower.

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“…It does not produce any particulate matter and toxic gases such as NO x and SO x at burning [1]. It is useful for a variety of applications such as liquefied petroleum gas substitute, transportation fuel, fuel cell, solvent and propellant in various aerosol products [2]. DME can be produced from a variety of feed-stock such as natural gas, crude oil, coal, waste products and biomass [3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and controllability analysis of DME production in an isothermal fixed bed reactor

Farsi

2015

Chem. Eng. Res. Bull.

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Abstract:In this study, to enhance Dimethyl Ether (DME) production from methanol dehydration, an isothermal fixed-bed reactor has been modeled heterogeneously against a commercial adiabatic reactor at dynamic condition. A sensitivity analysis has been carried out to evaluate the influence of input variables on the process conditions using considered dynamic model. The results of sensitivity analysis showed that the feed composition is the main input variable in this system. Also, the process controllability has been investigated using a conventional feedback PID controller. The outlet DME composition from the reactor and circulated boiling water pressure in the steam drum are selected as controlled and manipulated variables, respectively. The responses of the control system to disturbance rejection and setpoint tracking showed that the considered control structure can maintain the process at the desired condition.

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Production of hydrogen from dimethyl ether

Cited by 176 publications

References 20 publications

Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

Production of Hydrogen from Dimethyl Ether over Supported Rhodium Catalysts

Dynamic modeling and controllability analysis of DME production in an isothermal fixed bed reactor

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