Synthesis of dimethyl ether from methanol over aluminium phosphate and silica–titania catalysts

Yaripour, Fereydoon; Baghaei, Fatemeh; Schmidt, Iver; Perregaard, Jens

doi:10.1016/j.catcom.2005.05.003

Cited by 122 publications

(59 citation statements)

References 13 publications

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“…Since then, many methanol dehydration catalysts have been A c c e p t e d M a n u s c r i p t examined [5] including γ-Al 2 O 3 [2, 6-9], crystalline aluminosilicates [9,10], zeolites (ZSM-5) [11], clays [12] and phosphates such as aluminium phosphate [13,14]. However the most common catalysts used are γ-Al 2 O 3 and zeolites.…”

Section: Furthermore Diesel Exhausts Have Been Linked To Cancer [1] Imentioning

confidence: 99%

“…However, γ-Al 2 O 3 has a low activity at temperatures lower than 300 ˚C were no hydrocarbons are formed thus giving a total selectivity for DME of 100% [16]. Also γ-Al 2 O 3 is associated with weak to medium acidic sites, and thus is preferable in the MTD reaction [14] providing greater coke stability and lower by-product formation [8].…”

Section: Furthermore Diesel Exhausts Have Been Linked To Cancer [1] Imentioning

confidence: 99%

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Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Osman

Abu‐Dahrieh

Rooney

et al. 2012

Applied Catalysis B: Environmental

125

100

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Highlights Effect of precursors on the catalytic performance of alumina. AN samples is higher activity than AC, while AN550 is the optimum one. The AN550 showed methanol conversion and DME selectivity of 72% and 100% at 250 °C, respectively. Acid site density affected catalytic performance among the catalysts with alumina phase. Synthesis of alumina catalyst with high activity compared to commercial γ-Al 2 O 3 .Page 3 of 33 A c c e p t e d M a n u s c r i p t Abstract Dimethyl ether (DME) is amongst one of the most promising alternative, renewable and clean fuels being considered as a future energy carrier. In this study, the comparative catalytic performance of γ-Al 2 O 3 prepared from two common precursors (aluminium nitrate (AN) and aluminium chloride (AC)) is presented. The impact of calcination temperature was evaluated in order to optimise both the precursor and pre-treatment conditions for the production of DME from methanol in a fixed bed reactor. The catalysts were characterized by TGA, XRD, BET and TPD-pyridine. Under reaction conditions where the temperature ranged from 180-300˚C with a WHSV= 12.1 h -1 it was found that all the catalysts prepared from AN(η-Al 2 O 3 ) showed higher activity, at all calcination temperatures, than those prepared from AC(γ-Al 2 O 3 ). In this study the optimum catalyst was produced from AN and calcined at 550 ˚C.This catalyst showed a high degree of stability and had double the activity of the commercial γ-Al 2 O 3 or 87% of the activity of commercial ZSM-5 (80) at 250 ˚C.

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Section: Furthermore Diesel Exhausts Have Been Linked To Cancer [1] Imentioning

confidence: 99%

Section: Furthermore Diesel Exhausts Have Been Linked To Cancer [1] Imentioning

confidence: 99%

Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Osman

Abu‐Dahrieh

Rooney

et al. 2012

Applied Catalysis B: Environmental

125

100

View full text Add to dashboard Cite

show abstract

“…Catalyst application is one of the most important uses of phosphate materials, exemplified by the use of vanadium phosphate as a catalyst for the oxidation of butane [4], nickel phosphate for oxidizing alcohols [5], and iron phosphate for the oxidation of methane [6]. Furthermore, aluminum phosphate is an effective catalyst in the dehydration of alcohols [7], and other phosphates, such as zirconium, cobalt and potassium phosphates, are also recognized as important catalysts [8][9][10]. The catalytic reactions referenced so far were generally performed in gas phase.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and catalytic properties of iron-cerium phosphate prepared in ethylene glycol using additives

Onoda

Sakumura

2013

J Adv Ceram

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Abstract:The effects of cerium substitution, use of additives, and heating temperature on the chemical composition and catalytic activity of iron phosphate were evaluated. Iron-cerium phosphate was prepared from iron nitrate, ammonium cerium nitrate, and sodium phosphate in ethylene glycol using sodium dodecyl-sulfate or acetylacetone as additive. The chemical composition, particle shape and size distribution of the obtained samples were respectively evaluated based on ICP and XRD, SEM, and laser diffraction/scattering analysis. The catalytic activity was evaluated based on the decomposition of the complex formed from formaldehyde, ammonium acetate, and acetylacetone. XRD peaks corresponding to FePO 4 were observed for the samples heated at 600 ℃ whereas samples treated at lower temperatures were amorphous. Iron-cerium phosphates heated at 200 ℃ and 400 ℃ exhibited high catalytic activity for the decomposition of the aforementioned complex.

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“…Up to date, solid acid catalysts have been studied to develop a desirable process for methanol dehydration. [2][3][4][5][6][7][8][9][10][11][12] Among the catalysts, alumina has been considered a good candidate in this reaction. It have been known that the moderate acid site strength of alumina could enhance the formation of DME from methanol.…”

Section: Introductionmentioning

confidence: 99%

“…The first is a two-step process with a methanol synthesis and dehydration. The second is a one step process with bifunctional catalyst 7,8 or physically admixed catalysts [9][10][11][12] to produce DME from synthesis gas directly. Hence, the proper use of solid acid catalyst is one of key technologies in DME synthesis.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ionic Liquid as a Template on Preparation of Porous η-Al₂O₃to DME Synthesis from Methanol

Yoo

Lee²

2010

Bulletin of the Korean Chemical Society

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Porous η-Al2O3 was synthesized by modified sol-gel method using ionic liquid as a templating material. The addition of ionic liquid assisted to increase the surface area of alumina. However, the acidity of aluminas prepared with ionic liquids was hardly affected regardless the change of its structural properties. Among the ionic liquids used in this study, 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) was the most effective ionic liquid to produce porous η-Al2O3 particles. The catalytic performance of these aluminas has been investigated in dehydration of methanol to produce dimethyl ether. The alumina prepared with [Bmim][PF6] outperformed the other aluminas except η-Al2O3 without modification in this reaction.

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Synthesis of dimethyl ether from methanol over aluminium phosphate and silica–titania catalysts

Cited by 122 publications

References 13 publications

Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Synthesis and catalytic properties of iron-cerium phosphate prepared in ethylene glycol using additives

Influence of Ionic Liquid as a Template on Preparation of Porous η-Al₂O₃to DME Synthesis from Methanol

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Synthesis of dimethyl ether from methanol over aluminium phosphate and silica–titania catalysts

Cited by 122 publications

References 13 publications

Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Synthesis and catalytic properties of iron-cerium phosphate prepared in ethylene glycol using additives

Influence of Ionic Liquid as a Template on Preparation of Porous η-Al2O3to DME Synthesis from Methanol

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Influence of Ionic Liquid as a Template on Preparation of Porous η-Al₂O₃to DME Synthesis from Methanol