Dimethyl Ether Synthesis with in situ H2O Removal in Fixed-Bed Membrane Reactor: Model and Simulations†

2010 ◽  
Vol 49 (15) ◽  
pp. 6870-6877 ◽  
Author(s):  
I. Iliuta ◽  
F. Larachi ◽  
P. Fongarland
Keyword(s):  
Dimethyl Ether ◽  
Membrane Reactor ◽  
Fixed Bed ◽  
Reactor Model ◽  
Dimethyl Ether Synthesis ◽  
Ether Synthesis

Systematic staging design applied to the fixed-bed reactor series for methanol and one-step methanol/dimethyl ether synthesis

2014 ◽  
Vol 70 (2) ◽  
pp. 1228-1237 ◽  
Author(s):  
Flavio Manenti ◽  
Andres R. Leon-Garzon ◽  
Zohreh Ravaghi-Ardebili ◽  
Carlo Pirola
Keyword(s):  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Dimethyl Ether Synthesis ◽  
One Step ◽  
Ether Synthesis

scholarly journals Validation of a Fixed Bed Reactor Model for Dimethyl Ether Synthesis Using Pilot-Scale Plant Data

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1522
Author(s):  
Daesung Song ◽  
Sung Yong Cho ◽  
Thang Toan Vu ◽  
Yen Hoang Phi Duong ◽  
Eunkyu Kim
Keyword(s):  
Dimethyl Ether ◽  
Fixed Bed ◽  
Pilot Scale ◽  
Fixed Bed Reactor ◽  
Average Error ◽  
Reactor Model ◽  
Feed Pressure ◽  
Co Conversion ◽  
Dimethyl Ether Synthesis ◽  
The One

The one-dimensional (1D) mathematical model of fixed bed reactor was developed for dimethyl ether (DME) synthesis at pilot-scale (capacity: 25–28 Nm3/h of syngas). The reaction rate, heat, and mass transfer equations were correlated with the effectiveness factor. The simulation results, including the temperature profile, CO conversion, DME selectivity, and DME yield of the outlet, were validated with experimental data. The average error ratios were below 9.3%, 8.1%, 7.8%, and 3.5% for the temperature of the reactor, CO conversion, DME selectivity, and DME yield, respectively. The sensitivity analysis of flow rate, feed pressure, H2:CO ratio, and CO2 mole fraction was investigated to demonstrate the applicability of this model.

scholarly journals Water Inhibition of Oxymethylene Dimethyl Ether Synthesis over Zeolite H-Beta: A Combined Kinetic and in Situ ATR-IR Study

ACS Catalysis ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 8106-8119
Author(s):  
Christophe J. Baranowski ◽  
Thibault Fovanna ◽  
Maneka Roger ◽  
Matteo Signorile ◽  
Joseph McCaig ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Dimethyl Ether Synthesis ◽  
Ir Study ◽  
Water Inhibition ◽  
Ether Synthesis

Simulation of fixed bed reactor for dimethyl ether synthesis

2006 ◽  
Vol 23 (4) ◽  
pp. 522-530 ◽  
Author(s):  
Shin Beom Lee ◽  
Wonjun Cho ◽  
Dal Keun Park ◽  
En Sup Yoon
Keyword(s):  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Dimethyl Ether Synthesis ◽  
Ether Synthesis

Studies on Deactivation of the Catalyst in Direct Dimethyl Ether Synthesis

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Haipeng Zhang ◽  
Wei Li ◽  
Wende Xiao
Keyword(s):  
Synergistic Effect ◽  
Dimethyl Ether ◽  
Catalyst Deactivation ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
N2 Adsorption ◽  
Methanol Synthesis Catalyst ◽  
Dimethyl Ether Synthesis ◽  
Before And After ◽  
Ether Synthesis

Abstract Direct dimethyl ether (DME) synthesis from syngas has been increasingly attracted attentions. Relationship between the synergistic effect and the deactivation behavior of hybrid catalysts was studied in this paper. Two kinds of catalysts with different synergistic effect were tested in a fixed bed reactor and the catalysts before and after stability testing were characterized by XRD, N2-adsorption and TGA. Results show that the deactivation behavior of the catalyst is mainly caused by the deactivation of the methanol synthesis catalyst. Sintering of Cu particles is the main reason of the catalyst deactivation. In addition, coking during synthesis is another reason for the catalyst deactivation. Both the two reasons are deeply affected by the synergistic effect.

Dimethyl Ether Synthesis via Methanol Dehydration over Diatomite Catalyst Modified Using Hydrochloric Acid

2014 ◽  
Vol 931-932 ◽  
pp. 42-46 ◽  
Author(s):  
Watcharakorn Pranee ◽  
Pornsawan Assawasaengrat ◽  
Arthit Neramittagapong ◽  
Sutasinee Neramittagapong
Keyword(s):  
Hydrochloric Acid ◽  
Dimethyl Ether ◽  
Active Sites ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Methanol Dehydration ◽  
Dimethyl Ether Synthesis ◽  
Ether Synthesis

The synthesis of dimethyl ether via methanol dehydration has been carried out over untreated-diatomite catalyst (DM) and hydrochloric acid modified treatment on diatomite catalyst (DMHC). The reactions were carried out in a fixed-bed reactor. The effects of hydrochloric acid modifications of diatomite on its catalytic performance were studied. The characterization such as XRD, SEM, FT-IR and FT-Raman had no deformation after HCl-modified treatment on catalysts. DMHC catalyst apparently gave the higher methanol conversion rate than DM due to the acidity while the selectivity of dimethyl ether from 250 to 350°C was slightly changed. The acidity was depended upon Al(IV) ions; nevertheless, both Al(V) and Al(VI) were affected and hence increasing the basic active sites. Not only was the competitively catalytic methanol dehydrogenation preferred with basic condition but also methanol-blocking water molecule interaction was the unwanted reaction. In this investigation, the chemical-bond arrangements of silicon and aluminium ions were proposed with solid MAS/NMR. The DMHC catalyst exhibited better DME yield than the DM catalyst, and it could be used as a selective catalyst for DME synthesis from methanol.

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