Fixed-Bed Reactor Optimization for the Synthesis of Dimethyl Ether Using a 2D Model

2014 ◽  
Vol 86 (4) ◽  
pp. 550-553
Author(s):  
Hans-Jörg Zander ◽  
Gregor Bloch ◽  
Thibaut Monnin
Keyword(s):  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Reactor Optimization ◽  
2D Model ◽  
Synthesis Of Dimethyl Ether

A CuZnAl-Based Hybrid Material for the Direct Synthesis of Dimethyl Ether from Syngas

2012 ◽  
Vol 457-458 ◽  
pp. 261-264 ◽  
Author(s):  
Zhuo Li ◽  
Cheng Yang ◽  
Jian Qing Li ◽  
Jin Hu Wu
Keyword(s):  
Dimethyl Ether ◽  
Hybrid Material ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Synthesis Process ◽  
Impregnation Method ◽  
Active Components ◽  
Co Precipitation ◽  
Synthesis Of Dimethyl Ether

A CuZnAl-based hybrid material was prepared by co-precipitation impregnation method using the active components of methanol synthesis material and pseudo-boehmite as the precursors. The as-prepared material was evaluated for the direct synthesis of dimethyl ether (DME) from syngas in a pressurized continuous flow fixed-bed reactor system. It was revealed that the hybrid material showed high activity and selectivity after an induced period, i.e. the CO conversion and DME selectivity reached as high as 81% and 67%, respectively. Moreover, it was observed that there was only slight carbon which could be eliminated rather than graphite carbon deposited on the material after run for 150 h, indicating its good stability for the direct synthesis process .

Dimethyl Ether Conversion to Olefins over the SAPO-34/ZrO2 Catalysts: Effect of the ZrO2 Supporter

2011 ◽  
Vol 347-353 ◽  
pp. 3681-3684 ◽  
Author(s):  
Young Ho Kim ◽  
Su Gyung Lee ◽  
Byoung Kwan Yoo ◽  
Han Sol Je ◽  
Chu Sik Park
Keyword(s):  
Physicochemical Properties ◽  
Dimethyl Ether ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Coke Deposition ◽  
Light Olefins ◽  
Similar Activity ◽  
Dimethyl Ether Conversion ◽  
Zro2 Catalyst ◽  
Catalyst Lifetime

A SAPO-34 catalyst is well known to be one of the best catalysts for DME to olefins (DTO) reaction. Main products of the reaction were light olefins such as ethylene, propylene and butenes. However, the main problem is rapid deactivation of the SAPO-34 catalyst due to coke deposition during DTO reaction. In this study, various SAPO-34/ZrO2 catalysts added with ZrO2 were prepared for improving the lifetime and their physicochemical properties have been characterized by XRD and SEM. The DTO reaction over various SAPO-34/ZrO2 catalysts was carried out using a fixed bed reactor. All SAPO-34/ZrO2 catalysts showed similar activity and selectivity in the DTO reaction. The SAPO-34(9wt%)/ZrO2 catalyst was showed the best performance for the catalyst lifetime.

scholarly journals Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration

2013 ◽  
Vol 15 (2) ◽  
pp. 122-127 ◽  
Author(s):  
Ziyang Bai ◽  
Hongfang Ma ◽  
Haitao Zhang ◽  
Weiyong Ying ◽  
Dingye Fang
Keyword(s):  
Dimethyl Ether ◽  
Vapor Phase ◽  
Process Simulation ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Reflux Ratio ◽  
Methanol Vapor ◽  
Operation Conditions ◽  
Dimethyl Ether Synthesis ◽  
Simulation Results

The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase. In order to validate the proposed model, the simulation results have been compared with the available data from a set of industrial production equipment with a production capacity of 200 000 tonnes per annum. A comparison between the calculated and measured results has proved that these results are satisfactory. The bed height and the volume of the catalytic bed are calculated aim at one million t/a DME yields and while taking account of high-purity DME production. After discussing the influence of feed stage location and reflux ratio for DME product purity, the suitable unit operation conditions are chosen. Accordingly, accurate process simulation results provide the basis and guidance for an improvement and development of the similar industrial device.

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
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