Volume No. 7 Issue No.: 3 Page No.: 1153-1164 Jan. - Mar.2013




K. Moon, N. Madhu and Ganesh R. Kale*

Chemical Engineering and Process Development Division, National Chemical Laboratory,Pune (INDIA)


Received on : July 13, 2012




Existing chemical processes emit CO2 gas that is posing a serious problem of global warming and climate change. CO2 reforming is a process to produce useful products such as synthesis gas (H2+CO). The drawbacks of CO2 reforming can be reduced by adding H2O feed to the reformer. A detailed thermodynamic study of combined reforming (CR) using (CO2+H2O) is reported in this paper. A thermodynamic analysis of combined reforming process starting from steam reforming and gradually shifting to dry reforming with intermediate steps of steam reduction and equivalent CO2 addition to the reformer feed was studied. Thermodynamic equilibrium data for combined reforming was generated for temperature range of 500-900 °C at 1 bar pressure and combined oxidant (CO2+H2O) stream to propane (fuel) ratio of 3, 6 and 9 by employing the Gibbs free energy minimization algorithm of HSC Chemistry software. Carbon formation was significantly reduced in combined reforming than pure dry reforming. Combined reforming was found to be more flexible in obtaining the desired syngas ratio


Keywords : Dry reforming, Steam reforming, Combined reforming, Synthesis gas, Hydrogen, Thermodynamic analysis