Effect of Water on the Rate of Methanol Conversion to Dimethyl Ether Over H-ZSM-5 Zeolite

2021 ◽  
Author(s):  
O. O. Zhokh ◽  
A. I. Trypolskyi
Keyword(s):  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Effect Of Water

Catalytic Activity of Alumina-Modified Silica Gels in Methanol Conversion to Dimethyl Ether

2021 ◽  
Vol 94 (5) ◽  
pp. 576-585
Author(s):  
Z. A. Temerdashev ◽  
A. S. Kostina ◽  
A. V. Rudenko ◽  
I. A. Kolychev ◽  
A. M. Vasil’ev
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Silica Gels ◽  
Modified Silica ◽  
Modified Silica Gels

scholarly journals Methanol Conversion to Dimethyl Ether in Catalytic Zeolite Membrane Reactors

2020 ◽  
Vol 8 (28) ◽  
pp. 10471-10479 ◽  
Author(s):  
Adele Brunetti ◽  
Massimo Migliori ◽  
Daniela Cozza ◽  
Enrico Catizzone ◽  
Girolamo Giordano ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Membrane Reactors ◽  
Zeolite Membrane

Methanol conversion to dimethyl ether over beta zeolites derived from bagasse fly ash

2016 ◽  
Vol 38 (20) ◽  
pp. 3081-3088 ◽  
Author(s):  
Pornsawan Assawasangrat ◽  
Sutasinee Neramittagapong ◽  
Watcharakorn Pranee ◽  
Piyasan Praserthdam
Keyword(s):  
Fly Ash ◽  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Bagasse Fly Ash ◽  
Beta Zeolites

scholarly journals The Effect of Zeolite Features on the Dehydration Reaction of Methanol to Dimethyl Ether: Catalytic Behaviour and Kinetics

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5577
Author(s):  
Enrico Catizzone ◽  
Emanuele Giglio ◽  
Massimo Migliori ◽  
Paolo C. Cozzucoli ◽  
Girolamo Giordano
Keyword(s):  
Dimethyl Ether ◽  
Crystal Size ◽  
Catalyst Deactivation ◽  
Methanol Conversion ◽  
Dehydration Reaction ◽  
Exponential Factor ◽  
Structure Topology ◽  
Catalytic Behaviour ◽  
Direct Hydrogenation ◽  
Synthesis Of Dimethyl Ether

The synthesis of dimethyl ether (DME) is an important step in the production of chemical intermediate because it is possible to prepare it by direct hydrogenation of CO2. This paper reports the effect of different zeolitic frameworks (such as: BEA, EUO, FER, MFI, MOR, MTW, TON) on methanol conversion, DME selectivity and catalyst deactivation. The effect of crystal size, Si/Al ratio and acidity of the investigated catalysts have been also studied. Finally, the kinetic parameters (such as: ∆H, ∆S and ∆G) have been evaluated together with pre-exponential factor and activation energy for catalysts with FER and MFI structure topology.

Dimethyl Ether Synthesis over Novel Silicotungstic Acid Incorporated Nanostructured Catalysts

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Aysegul Ciftci ◽  
Dilek Varisli ◽  
Timur Dogu
Keyword(s):  
Dimethyl Ether ◽  
Nanostructured Catalysts ◽  
Methanol Conversion ◽  
Catalytic Performance ◽  
Atomic Ratio ◽  
Silicotungstic Acid ◽  
Hydrothermal Route ◽  
Structured Catalysts ◽  
Dimethyl Ether Synthesis ◽  
Very High

Dimethyl ether (DME), which is an excellent green diesel-fuel alternate with excellent clean burning properties, is synthesized by dehydration of methanol over novel solid acid catalysts, which are synthesized following a direct hydrothermal route and using silicotungstic acid (STA) as the active compound. These mesoporous silicate structured catalysts have surface area values of 108-393 m2/g, depending upon their W/Si ratio. These catalysts showed very high methanol dehydration activity and also very high DME selectivity values, approaching 100%. The STA-SiO2 mesoporous nanocomposite catalyst having a W/Si atomic ratio of 0.33 showed the highest activity, with a DME selectivity over 99% and a methanol conversion over 60%, at 250°C and at a space time of 0.27 s.g.cm-3. Effects of W/Si atomic ratio, calcination temperature and the synthesis procedure on the catalytic performance of these novel mesoporous catalytic materials were investigated.

Methanol Conversion to Dimethyl Ether over H-SAPO-34 Catalyst

2009 ◽  
Vol 48 (15) ◽  
pp. 7065-7071 ◽  
Author(s):  
Grigore Pop ◽  
Grigore Bozga ◽  
Rodica Ganea ◽  
Natalia Natu
Keyword(s):  
Dimethyl Ether ◽  
Methanol Conversion

Methanol Conversion into Dimethyl Ether on the Anatase TiO2(001) Surface

2015 ◽  
Vol 128 (2) ◽  
pp. 633-638 ◽  
Author(s):  
Feng Xiong ◽  
Yan-Yan Yu ◽  
Zongfang Wu ◽  
Guanghui Sun ◽  
Liangbing Ding ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Anatase Tio2

Gas-Phase Methanol Carbonylation for Dimethyl Ether and Acetic Acid Co-Production

2012 ◽  
Vol 554-556 ◽  
pp. 760-763 ◽  
Author(s):  
Bin Ru ◽  
Xin Bao Li ◽  
Ling Jun Zhu ◽  
Guo Hui Xu ◽  
Yue Ling Gu
Keyword(s):  
Acetic Acid ◽  
Gas Phase ◽  
Dimethyl Ether ◽  
Reaction Temperature ◽  
Catalyst Surface ◽  
Methanol Conversion ◽  
Methanol Carbonylation ◽  
Synthesis Of Dimethyl Ether

Gas-phase methanol carbonylation over HMOR catalyst was investigated for the synthesis of dimethyl ether (DME) and acetic acid (HOAc). The results revealed that the selectivity of DME reached 98% and the methanol conversion was 45% under the reaction temperature of 493K. While, the selectivity of HOAc was 30% and the methanol conversion reached 80% when reaction temperature was increased to 573K. TEM, SEM, XRD, N2 physisorbtion, XPS and TG-DTG measurements were performed to characterize the texture and structure of the catalyst. Serious coking on the catalyst surface significantly limited the utilization of unmodified HMOR catalyst in the reaction.

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