Sulfonated catalysts for methanol dehydration to dimethyl ether (DME)

Barbarossa, Vincenzo; Viscardi, Rosanna; Maestri, Giovanni; Maggi, Raimondo; Gattia, Daniele Mirabile; Paris, Emanuele

doi:10.1016/j.materresbull.2019.01.018

Cited by 30 publications

(14 citation statements)

References 28 publications

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“…Concerning the MCM‐41 catalyst, Al 3+ ions are introduced into the material network to create Lewis type acidic sites . As an alternative way to increase the acidity of MCM‐41, as well as of SiO 2 , a sulfonic moiety can be tethered on the materials surface . This procedure provides a Brönsted acid type catalyst.…”

Section: Resultsmentioning

confidence: 99%

“…The non‐functionalized catalysts: γ‐Al 2 O 3 , SiO 2 , MCM‐41, Al‐MCM 41 (Sigma Aldrich, St Louis, MO, USA) were commercial ones and used as received. Functionalized catalysts were prepared using literature procedure and details about their synthesis are reported elsewhere . Aquivion catalyst was kindly supplied by Solvay Specialty Polymer (Rosignano Solvay (LI), Italy).…”

Section: Methodsmentioning

confidence: 99%

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Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Barbarossa

Viscardi

Nardo

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: The methanol dehydration to dimethyl ether (DME) has received considerable attention in the literature, because of its potential use as a multipurpose fuel. A wide literature of kinetic studies is available for γ-Al 2 O 3 , reference commercial catalyst but only a few authors report a kinetic analysis of attractive and alternative catalysts to γ-Al 2 O 3 in DME production. The aim of this work was to contribute in this direction, by performing a catalytic test focused on the determination of kinetic parameters for methanol dehydration over sulfonic acid catalysts and polymeric materials. RESULTS:The catalytic and kinetic behavior of these materials for the methanol to DME dehydration reaction has been investigated using a fixed bed reactor at total pressure of 1 bar within a temperature range of 50 to 450°C. The sulfonated fluoropolymer (Aquivion) exhibited the highest activity and stability for the dehydration reaction at relatively low temperatures at which the γ-Al 2 O 3 did not display any dehydration activity. The tested catalysts showed good time stability when both methanol and methanol/water mixtures were used as feed reactants. Good agreement was achieved between experimental data and the proposed model. CONCLUSION: The -SO 3 H groups enhanced the surface acidity and the catalytic performances. The sulfonated perfluorinated polymer (Aquivion) was able to catalyze the methanol/DME conversion at temperatures as low as 90°C. The selectivity to DME at lower temperatures was 100%. Apparent activation energy for this reaction was experimentally evaluated to 110 KJ/mol and theoretical calculated to 96 KJ/mol: there was a comparable and good agreement with the experimental data. Scheme 1. Structure of Aquivion (m = 1, 2 and n = 8, 8).www.soci.org V Barbarossa et al.wileyonlinelibrary.com/jctb

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Barbarossa

Viscardi

Nardo

et al. 2020

J of Chemical Tech & Biotech

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“…This deactivation can be caused by the competing adsorption of water, dimers, trimers, or even larger alcohol-water clusters, but also the (reversible) formation of (surface) boehmite was shown. 27 Despite the large attention for more active low-temperature methanol dehydration catalysts, 4,6,59,69,71,73,74,[76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95] γ-Al 2 O 3 remains the catalyst of choice for industrial DME production, due to its low cost, high surface area, good thermal and mechanical stability, and high selectivity to DME because its relatively weak Lewis acid sites do not promote side reactions. 4,70,96,97 In contrast to direct DME synthesis, SEDMES offers two specific advantages for the (γ-Al 2 O 3 ) catalyst: the system is operated at low steam pressures and is periodically regenerated due to its adsorptive nature.…”

Section: Steam Adsorbentmentioning

confidence: 99%

Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration

et al. 2021

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“…DME is a colorless gas at the ambient condition and easily liquefied under low pressure [20]. At present, DME is mainly used as an aerosol propellant or, due to its physical properties close to liquefied petroleum gas (LPG), it can also be used as a LPG substitute for household and industrial purposes [1,[21][22][23]. Dimethyl ether (DME) is a potential alternative fuel to diesel used in compression ignition engines [24,25] due to its higher cetane number (55-60) and lower autoignition temperature compared to those of diesel (235°C) [26,27].…”

Section: Introductionmentioning

confidence: 99%

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

Kartohardjono

Adji

Muharam

2020

International Journal of Chemical Engineering

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Increase in the world energy demand also increases the concentration of CO2 in the atmosphere, which contributes to global warming and ocean acidification. This study proposed the simulation process to utilize CO2 released from the acid gas removal unit in one of gas processing plants in Indonesia to enhance the production of dimethyl ether (DME) through unreacted gas recycle that can be beneficial in reducing CO2 emission to the atmosphere. Simulation was developed in Unisim R390.1 using Peng–Robinson–Stryjek–Vera (PRSV) as a fluid package. Simulation was validated by several studies conducted by many researchers and giving satisfactory results especially in terms of productivity, conversion, and selectivity as a function of reactor temperatures in the indirect and the direct DME synthesis processes. Simulation results show that the DME production was enhanced by around 49.6% and 65.1% for indirect and direct processes, respectively, at a recycling rate of 7 MMSCFD. Compressor is required to increase the unreacted gas pressure to the desired pressure in the methanol reactor or dual methanol-DME reactor in both processes. Specific power consumption (SPC) was used as a tested parameter for the effectiveness of recycling unreacted gas. Based on the simulation, the direct DME synthesis process is superior over the indirect process in terms of DME and methanol productions, SPCs, and system energy efficiencies.

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Sulfonated catalysts for methanol dehydration to dimethyl ether (DME)

Cited by 30 publications

References 28 publications

Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

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Sulfonated catalysts for methanol dehydration to dimethyl ether (DME)

Cited by 30 publications

References 28 publications

Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Kinetic parameter estimation for methanol dehydration to dimethyl ether over sulfonic and polymeric acid catalysts

Sorption enhanced dimethyl ether synthesis under industrially relevant conditions: experimental validation of pressure swing regeneration

CO2 Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

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CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)