CO2 Utilization by Photocatalytic Conversion to Lower Hydrocarbons and Alcohols

Oymak, Mert Mehmet
İpek Torun, Bahar
Üner, Deniz
Global Conference on Global Warming


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...
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
Tuygun, Cansu; İpek Torun, Bahar (2021-01-01)
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...
CO2 utilisation by photocatalytic conversion to methane and methanol
Üner, Deniz; İpek Torun, Bahar (Inderscience Publishers, 2011-01-01)
In this paper we intend to give a broad overview of natural and artificial photosynthesis systems. We point out seven orders of magnitude difference of the rates of water splitting between natural and state of the art artificial photosynthesis in favour of natural photosynthesis. We reviewed the open literature for photocatalytic water splitting, CO2 reduction and suggested routes for improvements in the low yields.
CO2 addition and pressure effects on laminar and turbulent lean premixed CH4 air flames
Cohé, Cecile; Chauveau, Christian; Goekalp, Iskender; Kurtuluş, Dilek Funda (Elsevier BV, 2009-01-01)
An experimental study on CH4-CO2-air flames at various pressures is conducted by using both laminar and turbulent Bunsen flame configurations. The aim of this research is to contribute to the characterization of fuel lean methane/carbon dioxide/air premixed laminar and turbulent flames at different pressures, by studying laminar and turbulent flame propagation velocities, the flame surface density and the instantaneous flame front wrinkling parameters. PREMIX computations and experimental results indicate a...
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
M. M. Oymak, B. İpek Torun, and D. Üner, “CO2 Utilization by Photocatalytic Conversion to Lower Hydrocarbons and Alcohols,” presented at the Global Conference on Global Warming, İstanbul, Türkiye, 2009, Accessed: 00, 2022. [Online]. Available: