Patcharavorachot, Yaneeporn

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Preferred name
Patcharavorachot, Yaneeporn
Alternative Name
Patcharavorachot, Y.
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Email
yaneeporn.pa@kmitl.ac.th

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    Item type:Publication,
    Optimization of hydrogen production from three reforming approaches of glycerol via using supercritical water with in situ CO2 separation
    (2019-01-22)
    Patcharavorachot, Yaneeporn
    ;
    Chatrattanawet, Narissara
    ;
    Arpornwichanop, Amornchai
    ;
    Assabumrungrat, Suttichai
    A pathway for hydrogen production from supercritical water reforming of glycerol integrated with in situ CO<inf>2</inf> removal was proposed and analyzed. The thermodynamic analysis carried out by the minimizing Gibbs free energy method of three glycerol reforming processes for hydrogen production was investigated in terms of equilibrium compositions and energy consumption using AspenPlus™ simulator. The effect of operating condition, i.e., temperature, pressure, steam to glycerol (S/G) ratio, calcium oxide to glycerol (CaO/G) ratio, air to glycerol (A/G) ratio, and nickel oxide to glycerol (NiO/G) ratio on the hydrogen production was investigated. The optimum operating conditions under maximum H<inf>2</inf> production were predicted at 450 °C (only steam reforming), 400 °C (for autothermal reforming and chemical looping reforming), 240 atm, S/G ratio of 40, CaO/G ratio of 2.5, A/G ratio of 1 (for autothermal reforming), and NiO/G ratio of 1 (for chemical looping reforming). Compared to three reforming processes, the steam reforming obtained the highest hydrogen purity and yield. Moreover, it was found that only autothermal reforming and chemical looping reforming were possible to operate under the thermal self-sufficient condition, which the hydrogen purity of chemical looping reforming (92.14%) was higher than that of autothermal reforming (52.98%). Under both the maximum H<inf>2</inf> production and thermal self-sufficient conditions, the amount of CO was found below 50 ppm for all reforming processes.
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    Item type:Publication,
    Integration of ethanol processor and CO2 absorption to produce hydrogen for fuel cell
    (2014-01-01)
    Patcharavorachot, Yaneeporn
    ;
    Sangduan, Kidakarn
    ;
    Ponpesh, Pimporn
    ;
    Assabumrungrat, Suttichai
    ;
    Arpornwichanop, Amornchai
    Ethanol is considered to be a promising candidate for hydrogen source. Hydrogen-rich gas with less impurity level of carbon monoxide and carbon dioxide is required for fuel cell applications. In a conventional ethanol processor, CO can be removed by water gas-shift reactors, followed by a preferential oxidation unit. Since a high content of CO<inf>2</inf> may degrade the efficiency of fuel cell systems, the removal of CO<inf>2</inf> should be included in the ethanol processor to separate CO<inf>2</inf> from the synthesis gas. In this study, the thermodynamic analysis of hydrogen production from the integration of ethanol reforming process and CO<inf>2</inf> absorption unit is performed. The purity of H2, efficiency of CO<inf>2</inf> removal and heat consumption are key factors to be analyzed with regard to different key parameters. The result indicates that the H2 purity of 97 mol.% can be reached when the CO<inf>2</inf> absorption unit is included in the ethanol steam reforming. In addition, it is found that the CO<inf>2</inf> removal can be improved with increases of amine concentration, number of absorber and stripper stages, whereas increase of inlet gas temperature show the opposite trend. However, high energy demand is unavoidable when a number of absorber and stripper stages increase.