Performance of modified H-ZSM-5 zeolite for dehydration of methanol to dimethyl ether

Hassanpour, Samaneh; Yaripour, Fereydoon; Taghizadeh, Majid

doi:10.1016/j.fuproc.2010.03.035

Cited by 65 publications

(39 citation statements)

References 14 publications

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“…In this concern, zeolites (mainly H-MFI) were also investigated as alternative to γ-Al 2 O 3 revealing a better stability to water presence [9] and good conversion and selectivity. In addition these materials offer the possibility to modulate the catalyst properties (acidity, specific surface area ,crystal size and shape selectivity) as a way to improve the process performances [12][13][14]. Nevertheless, in the temperature range of direct synthesis (260-300°C), the acid catalyst may start to promote other reactions, converting the methanol to a range of different hydrocarbons (Methanol to Hydrocarbon -MTH).…”

Section: Introductionmentioning

confidence: 99%

Dimethyl ether synthesis via methanol dehydration: Effect of zeolite structure

Catizzone

Aloise

Migliori

et al. 2015

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Dimethyl ether synthesis via methanol dehydration: Effect of zeolite structure

Catizzone

Aloise

Migliori

et al. 2015

Applied Catalysis A: General

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“…Currently, DME is made by catalytic dehydration of methanol over an acidic catalyst such as γ-alumina and modified-alumina with silica and phosphorus, silica-alumina, zeolites (chabazites, mordenites, SAPOs, H-ZSM-5, H-Y,…) [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of Microwave and Ultrasonic-Assisted Aging on the Synthesis of H-ZSM-5 Nanozeolite and Its Catalytic Performance in Methanol Dehydration

Abbasian

Taghizadeh

2014

International Journal of Chemical Reactor Engineering

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H-ZSM-5 nanozeolite was hydrothermally synthesized under static conditions. Evaluation of hydrothermal synthesis of ZSM-5 was performed by treating the synthesis mixture using different aging processes, consist of ultrasonic, stirring, and microwave-assisted aging, prior to the conventional hydrothermal treatment. The catalytic performances of selected catalysts were studied for the dehydration of methanol to dimethyl ether (DME) in a fixed-bed reactor under the same operating conditions (T ¼ 300°C, P ¼ 1 atm, and WHSV ¼ 26 h −1 ). The prepared samples were characterized by XRD, SEM, BET, NH 3 -TPD and FT-IR techniques. The results showed that ultrasonic and microwave-assisted aging shortened the crystallization time and reduced crystal size of the obtained products without having any considerable effects on their catalytic activities.

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“…The dehydration reaction takes place on solid-acid catalysts such as γ-alumina, alumina modified with silica, phosphorus, Al 2 O 3 -B 2 O 3 and zeolites materials such as chabazite, mordenite, SAPOs, HZSM-5and H-Y in the temperature ranging from 250-400 °С and pressure up to 18 bar [2]. Among these catalysts, γ-alumina and HZSM-5 are extensively studied and attracted a great deal of attention as potential catalysts due to their high activity and proper stability [3][4][5].…”

Section: Introductionmentioning

confidence: 99%