Direct conversion of syngas to dimethyl ether as a green fuel over ultrasound-assisted synthesized CuO–ZnO–Al2O3/HZSM-5 nanocatalyst: effect of active phase ratio on physicochemical and catalytic properties at different process conditions

2014 ◽  
Vol 4 (6) ◽  
pp. 1779-1792 ◽  
Author(s):  
Reza Khoshbin ◽  
Mohammad Haghighi
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Properties ◽  
Active Phase ◽  
Direct Conversion ◽  
Phase Ratio ◽  
Process Conditions ◽  
Ultrasound Assisted ◽  
Co Precipitation ◽  
Green Fuel

Hybrid co-precipitation–ultrasound synthesis of CuO–ZnO–Al2O3/HZSM-5 used in direct conversion of syngas to dimethyl ether as a green fuel.

scholarly journals Enhanced Direct Dimethyl Ether Synthesis from CO2-Rich Syngas with Cu/ZnO/ZrO2 Catalysts Prepared by Continuous Co-Precipitation

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 816
Author(s):  
Sabrina Polierer ◽  
David Guse ◽  
Stefan Wild ◽  
Karla Herrera Delgado ◽  
Thomas N. Otto ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Properties ◽  
Direct Synthesis ◽  
Copper Surface ◽  
Precipitation Method ◽  
Dme Synthesis ◽  
Surface Areas ◽  
Dimethyl Ether Synthesis ◽  
Material Homogeneity ◽  
Co Precipitation

The manufacturing of technical catalysts generally involves a sequence of different process steps, of which co-precipitation is one of the most important. In this study, we investigate how continuous co-precipitation influences the properties of Cu/ZnO/ZrO2 (CZZ) catalysts and their application in the direct synthesis of dimethyl ether (DME) from CO2/CO/H2 feeds. We compare material characteristics investigated by means of XRF, XRD, N2 physisorption, H2-TPR, N2O-RFC, TEM and EDXS as well as the catalytic properties to those of CZZ catalysts prepared by a semi-batch co-precipitation method. Ultra-fast mixing in continuous co-precipitation results in high BET and copper surface areas as well as in improved metal dispersion. DME synthesis performed in combination with a ferrierite-type co-catalyst shows correspondingly improved productivity for CZZ catalysts prepared by the continuous co-precipitation method, using CO2-rich as well as CO-rich syngas feeds. Our continuous co-precipitation approach allows for improved material homogeneity due to faster and more homogeneous solid formation. The so-called “chemical memory” stamped during initial co-precipitation is kept through all process steps and is reflected in the final catalytic properties. Furthermore, our continuous co-precipitation approach may be easily scaled-up to industrial production rates by numbering-up. Hence, we believe that our approach represents a promising contribution to improve catalysts for direct DME synthesis.

Direct Conversion of Dimethyl Ether and CO to Acetone via Coupling Carbonylation and Ketonization

2021 ◽  
Author(s):  
Ziqiao Zhou ◽  
Hongchao Liu ◽  
Youming Ni ◽  
Fuli Wen ◽  
Zhiyang Chen ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Direct Conversion

scholarly journals Process Simulation and Environmental Aspects of Dimethyl Ether Production from Digestate-Derived Syngas

2021 ◽  
Vol 18 (2) ◽  
pp. 807
Author(s):  
Aristide Giuliano ◽  
Enrico Catizzone ◽  
Cesare Freda
Keyword(s):  
Dimethyl Ether ◽  
Process Simulation ◽  
Carbon Capture ◽  
Energy Transition ◽  
Process Conditions ◽  
Co2 Absorption ◽  
Environmental Aspects ◽  
Dme Synthesis ◽  
Water Gas ◽  
Synthesis Of Dimethyl Ether

The production of dimethyl ether from renewables or waste is a promising strategy to push towards a sustainable energy transition of alternative eco-friendly diesel fuel. In this work, we simulate the synthesis of dimethyl ether from a syngas (a mixture of CO, CO2 and H2) produced from gasification of digestate. In particular, a thermodynamic analysis was performed to individuate the best process conditions and syngas conditioning processes to maximize yield to dimethyl etehr (DME). Process simulation was carried out by ChemCAD software, and it was particularly focused on the effect of process conditions of both water gas shift and CO2 absorption by Selexol® on the syngas composition, with a direct influence on DME productivity. The final best flowsheet and the best process conditions were evaluated in terms of CO2 equivalent emissions. Results show direct DME synthesis global yield was higher without the WGS section and with a carbon capture equal to 85%. The final environmental impact was found equal to −113 kgCO2/GJ, demonstrating that DME synthesis from digestate may be considered as a suitable strategy for carbon dioxide recycling.

Effect of magnesium on the catalytic properties of polymetallic zeolite catalysts for conversion of dimethyl ether to light olefins

2020 ◽  
Vol 298 ◽  
pp. 110087 ◽  
Author(s):  
N.V. Kolesnichenko ◽  
Е.N. Khivrich ◽  
T.K. Obukhova ◽  
Т.I. Batova ◽  
G.N. Bondarenko
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Properties ◽  
Zeolite Catalysts ◽  
Light Olefins
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