CO2 hydrogenation to methanol and dimethyl ether at atmospheric pressure using Cu-Ho-Ga/gamma-Al2O3 and Cu-Ho-Ga/ZSM-5: Experimental study and thermodynamic analysis

2021-01-01
Tuygun, Cansu
İpek Torun, Bahar
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
232
views
0
downloads
CO2 valorization through chemical reactions attracts significant attention due to the mitigation of greenhouse gas effects. This article covers the catalytic hydrogenation of CO2 to methanol and dimethyl ether using Cu-Ho-Ga containing ZSM-5 and gamma-Al2O3 at atmospheric pressure and at temperatures of 210 degrees C and 260 degrees C using a CO2:H-2 feed ratio of 1:3 and 1:9. In addition, the thermodynamic limitations of methanol and DME formation from CO2 was investigated at a temperature range of 100-400 degrees C. Cu-Ho-Ga/gamma-Al2O3 catalyst shows the highest formation rate of methanol (90.3 mu mol CH3OH/g cat/h) and DME (13.2 mu mol DME/g cat/h) as well as the highest selectivity towards methanol and DME (39.9 %) at 210 degrees C using a CO2:H-2 1:9 feed ratio. In both the thermodynamic analysis and reaction results, the higher concentration of H-2 in the feed and lower reaction temperature resulted in higher DME selectivity and lower CO production rates.
CO2 hydrogenation to methanol, Dimethyl ether, Atmospheric pressure, Holmium, gallium, Thermodynamic analysis
https://hdl.handle.net/11511/90390
TURKISH JOURNAL OF CHEMISTRY
Department of Chemical Engineering, Article

Suggestions

CO2 hydrogenation to methanol over supported copper and gallium based catalysts at the atmospheric pressure
Osmanağa, Sezer; İpek Torun, Bahar; Önal, Işık; Department of Chemical Engineering (2022-8)
The continuous increase of the CO2 concentration in the atmosphere has been negatively impacting the environment, due to its contribution in the global warming. Hence, it is necessary for the current CO2 valorization techniques to advance in order to make use of CO2. A possible technique is the CO2 hydrogenation to methanol and DME. The process of CO2 hydrogenation to methanol has been taking place in industry for about a century. However, due to the thermodynamic limitation imposed by the reaction stoichio...
Geochemical characterization of geothermal systems in western Anatolia (Turkey): implications for CO2 trapping mechanisms in prospective CO2-EGS sites
Elidemir, Sanem; Güleç, Nilgün Türkan (2018-02-01)
Geological storage of CO2 is currently regarded as one of the major strategies to mitigate the increasing CO2 concentrations in the atmosphere due to anthropogenic emissions from large-scale point sources. Enhanced geothermal systems (EGS) are a novel concept in which CO2 is used as a working fluid to increase energy recovery, combined with its subsurface storage. In this study, the geothermal systems of western Anatolia are considered as potential sites for EGS, and the published hydrogeochemical data rele...
CO2 injection in carbonates
Izgec, O.; Demiral, B.; Bertin, H.; Akın, Serhat (2005-07-28)
Started as an EOR technique to produce oil, injection of carbon dioxide which is essentially a greenhouse gas is becoming more and more important. Although there are a number of mathematical modeling studies, experimental studies are limited and most studies focus on injection into sandstone reservoirs as opposed to carbonate ones. This study presents the results of computerized tomography (CT) monitored laboratory experiments to characterize relevant chemical reactions associated with injection and storage...
Seismic velocity characterisation and survey design to assess CO2 injection performance at Kizildere geothermal field
Parlaktuna, Mahmut; Parlaktuna, Burak; Sınayuç, Çağlar; Senturk, Erdinc; Tonguc, Erinc; Demircioglu, Oncu; Poletto, Flavio; Bohm, Gualtiero; Bellezza, Cinzia; Farina, Biancamaria (2021-08-01)
The noncondensable gases in most geothermal resources include CO2 and smaller amounts of other gases. Currently, the worldwide geothermal power is a small sector within the energy industry, and CO2 emissions related to the utilisation of geothermal resources are consequently small. In some countries, however, such as Turkey and Iceland, geothermal energy production contributes significantly to their energy budget, and their CO2 emissions are relatively significant. SUCCEED is a targeted innovation and resea...
CO2 mitigation from the flue gas of the iron steel making industry by microalgal cultures
Çaylı, Direniş; Bayramoğlu, Tuba Hande; Demirer, Göksel Niyazi; Uludağ Demirer, Sibel (null; 2015-06-15)
Integration of CO2 mitigation with nutrient removal from different wastewater sources can be realized by microalgae growth. In spite of being an option with significant environmental benefits, this technology still suffers from achieving high performances since atmospheric concentration of CO2 limits microalgae growth; i.e. biomass accumulation. This is why the use of flue gas with CO2 concentrations of 20-25% (by volume) should be considered as an inorganic C source for the microalgae culture reactors. Thi...
Citation Formats
C. Tuygun and B. İpek Torun, “CO2 hydrogenation to methanol and dimethyl ether at atmospheric pressure using Cu-Ho-Ga/gamma-Al2O3 and Cu-Ho-Ga/ZSM-5: Experimental study and thermodynamic analysis,” TURKISH JOURNAL OF CHEMISTRY, pp. 231–247, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90390.
METU IIS - Integrated Information Service open@metu.edu.tr