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Hydrogen and Biofuel Production from 2-Propanol Over Ru/Al2O3 Catalyst in Supercritical Water

Authors: Ekin Kıpçak, Yağmur Karakuş, Mesut Akgün

Abstract:

Hydrogen is an important chemical in many industries and it is expected to become one of the major fuels for energy generation in the future. Unfortunately, hydrogen does not exist in its elemental form in nature and therefore has to be produced from hydrocarbons, hydrogen-containing compounds or water.

Above its critical point (374.8oC and 22.1MPa), water has lower density and viscosity, and a higher heat capacity than those of ambient water. Mass transfer in supercritical water (SCW) is enhanced due to its increased diffusivity and transport ability. The reduced dielectric constant makes supercritical water a better solvent for organic compounds and gases. Hence, due to the aforementioned desirable properties, there is a growing interest toward studies regarding the gasification of organic matter containing biomass or model biomass solutions in supercritical water.

In this study, hydrogen and biofuel production by the catalytic gasification of 2-Propanol in supercritical conditions of water was investigated. Ru/Al2O3 was the catalyst used in the gasification reactions. All of the experiments were performed under a constant pressure of 25 MPa. The effects of five reaction temperatures (400, 450, 500, 550 and 600oC) and five reaction times (10, 15, 20, 25 and 30 s) on the gasification yield and flammable component content were investigated.

Keywords: 2-Propanol, Gasification, Ru/Al2O3, Supercritical water.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1087972

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References:


[1] S. O. Akansu, Z. Dulger, N. Kahraman, and T. N. Veziroğlu, “Internal combustion engines fueled by natural gas – hydrogen mixtures”, Int. Journal of Hydrogen Energy, Vol. 29, pp. 1527-1539, 2004.
[2] D. Bröll, C. Kaull, A. Kramer, P. Krammer, T. Richter, M. Jung, H. Vogel, and P. Zehner, “Chemistry in supercritical water”, Angew. Chem. Int. Ed., Vol. 38, pp. 2998-3014, 1999.
[3] E. Dinjus and A. Kruse, “Hot Compressed Water – A Suitable and Sustainable Solvent and Reaction Medium”, J. Phys. Condens. Matter, Vol. 16, pp. 1161-1169, 2004.
[4] E. Kıpçak, O. O. Söğüt, and M. Akgün, “Hydrothermal gasification of olive mill wastewater as a biomass source in supercritical water”, Journal of Supercritical Fluids, Vol. 57, pp. 50-57, 2011.
[5] Ullmann’s Encyclopedia of Industrial Chemistry, 6th Edition, Wiley- WCH, 2002.