Catalytic Oxidation of Dimethyl Ether to Hydrocarbons over SnO2/MgO and SnO2/CaO Catalysts

Yu, Lin; Xu, Jieyu; Sun, Ming; Wang, Xuetao

doi:10.1016/s1003-9953(07)60048-6

Cited by 18 publications

(14 citation statements)

References 15 publications

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“…The product distribution clearly suggests that the water underwent reaction with CO [Equa- tion (8)]. It is open to debate whether the hydrolysis of DME [Equation (9)] precedes the above reactions [Eq. (4)- (7)].…”

Section: Catalytic Studiesmentioning

confidence: 99%

“…As many important chemicals can be prepared from DME, it is clear that its catalytic reactions have been the subject of extensive research. This includes its combustion, [4][5][6][7][8][9] selective oxidation to light olefins and formaldehyde, [10][11][12][13][14] and transformation to hydrocarbons. [15][16][17][18][19] DME can even be converted into C 6 -C 9 aromatics with high yield on Mo 2 C/ZSM-5 catalyst.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Catalytic Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Production of Hydrogen from Dimethyl Ether over Supported Rhodium Catalysts

2009

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“…Yu et al have studied SnO2/MgO and SnO2/CaO catalysts in the production of methyl formate, dimethoxyethane and ethanol from DME through catalytic oxidation. The DME conversion of 21.8% was obtained over SnO2/CaO at 300 °C with the selectivity of 19.1% to methyl formate and 59% to dimethoxyethane [298]. DME can be also converted to propylene over MCM-68 zeolite [300].…”

Section: Potential Existing Technologies and New Considerations For Vmentioning

confidence: 82%

“…Dimethyl ether is used as a propellant and methyl t-butyl ether (MTBE) is used as octane number increasing additive in gasoline [296]. Dimethyl ether (DME) is considered as a potential alternative fuel for diesel engines, but it can also be used as a source for other hydrocarbons [297][298][299]. Yu et al have studied SnO2/MgO and SnO2/CaO catalysts in the production of methyl formate, dimethoxyethane and ethanol from DME through catalytic oxidation.…”

Section: Potential Existing Technologies and New Considerations For Vmentioning

confidence: 99%

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

et al. 2015

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Abstract:The treatment of volatile organic compounds (VOC) emissions is a necessity of today. The catalytic treatment has already proven to be environmentally and economically sound technology for the total oxidation of the VOCs. However, in certain cases, it may also become economical to utilize these emissions in some profitable way. Currently, the most common way to utilize the VOC emissions is their use in energy production. However, interesting possibilities are arising from the usage of VOCs in hydrogen and syngas production. Production of chemicals from VOC emissions is still mainly at the research stage. However, few commercial examples exist. This review will summarize the commercially existing VOC utilization possibilities, present the utilization applications that are in the research stage and introduce some novel ideas related to the catalytic utilization possibilities of the VOC emissions. In general, there exist a vast number of possibilities for VOC OPEN ACCESSCatalysts 2015, 5 1093 utilization via different catalytic processes, which creates also a good research potential for the future.

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“…Utilizing oxidation of DME to synthesize DMM x is one of the most attractive green routes for the synthesis of clean fuel additives with a short process, low CO 2 emissions and high energy efficiency. DME oxidation has been paid more and more attention due to the advantages of simplicity and feasibility [3][4][5][6][7][8]. Yagita Hirosh et al examined DME oxidation to 1,2-dimethoxyethane (DMET) over a SnO 2 /MgO catalyst [9].…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Oxidation of Dimethyl Ether to Polyoxymethylene Dimethyl Ethers over CNT-Supported Rhenium Catalyst

et al. 2016

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Due to its excellent conductivity, good thermal stability and large specific surface area, carbon nano-tubes (CNTs) were selected as support to prepare a Re-based catalyst for dimethyl ether (DME) direct oxidation to polyoxymethylene dimethyl ethers (DMM x ). The catalyst performance was tested in a continuous flow type fixed-bed reactor. H 3 PW 12 O 40 (PW 12 ) was used to modify Re/CNTs to improve its activity and selectivity. The effects of PW 12 content, reaction temperature, gas hourly space velocity (GHSV) and reaction time on DME oxidation to DMM x were investigated. The results showed that modification of CNT-supported Re with 30% PW 12 significantly increased the selectivity of DMM and DMM 2 up to 59.0% from 6.6% with a DME conversion of 8.9%; besides that, there was no CO x production observed in the reaction under the optimum conditions of 513 K and 1800 h´1. The techniques of XRD, BET, NH 3 -TPD, H 2 -TPR, XPS, TEM and SEM were used to characterize the structure, surface properties and morphology of the catalysts. The optimum amount of weak acid sites and redox sites promotes the synthesis of DMM and DMM 2 from DME direct oxidation.

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Catalytic Oxidation of Dimethyl Ether to Hydrocarbons over SnO2/MgO and SnO2/CaO Catalysts

Cited by 18 publications

References 15 publications

Production of Hydrogen from Dimethyl Ether over Supported Rhodium Catalysts

Production of Hydrogen from Dimethyl Ether over Supported Rhodium Catalysts

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

Low-Temperature Oxidation of Dimethyl Ether to Polyoxymethylene Dimethyl Ethers over CNT-Supported Rhenium Catalyst

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