Hydrogen production from 2-propanol over Pt/Al2O3 and Ru/Al2O3 catalysts in supercritical water


Karakus Y., Aynaci F., KIPÇAK E. , AKGÜN M.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.38, ss.7298-7306, 2013 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 38 Konu: 18
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.ijhydene.2013.04.033
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Sayfa Sayısı: ss.7298-7306

Özet

One of the alternative energy sources to fossil fuels is the use of hydrogen as an energy carrier, which provides zero emission of pollutants and high-energy efficiency when used in fuel cells, hydrogen internal combustion engines (HICE) or hydrogen-blend gaseous fueled internal combustion engines (HBICE). The gasification of organics in supercritical water is a promising method for the direct production of hydrogen at high pressures, with very short reaction times. In this study, hydrogen production from 2-propanol over Pt/Al2O3 and Ru/Al2O3 catalysts was investigated in supercritical water. To investigate the influences on hydrogen production, the experiments were carried out in the temperature range of 400 -550 degrees C and in the reaction time range of 10-30 s, under a pressure of 25 MPa. In addition, different 2-propanol concentrations and reaction pressures were tested in order to comprehend the effects on the gasification yield and hydrogen production. It was found that Pt/Al2O3 catalyst was much more selective and effective for hydrogen production when compared to Ru/Al2O3. During the catalytic gasification of a 0.5 M solution of 2-propanol, a hydrogen content up to 96 mol% for a gasification yield of 5 L/L feed was obtained. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.