کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1275619 | 1497457 | 2015 | 9 صفحه PDF | دانلود رایگان |
• Effectiveness factors of catalyst pellets for steam methane reforming are calculated.
• Operating conditions relevant to small-scale steam methane reformers are considered.
• A simple method is proposed to accurately retrieve the calculated effectiveness data.
• The method is validated for various reforming conditions and geometrical parameters.
A simple method is devised for determining the effectiveness factors of spherical nickel catalyst pellets used for steam methane reforming (SMR) processes; specifically, the factors are determined for reforming conditions relevant to small-scale hydrogen production systems (1–3 bar pressure, 600–800 °C temperature, 2–4 steam/carbon ratio). The effectiveness factors are plotted with respect to a newly proposed effective Thiele modulus that considers the mass transfer limitation near the equilibrium methane conversion. Then, a modified Thiele modulus is introduced to make the effectiveness factors for various reforming conditions and structural parameters fall on a single correlation curve. The results indicate that the proposed method can properly describe the effectiveness factors of nickel catalyst pellets for the SMR conditions considered in this study.
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 16, 4 May 2015, Pages 5644–5652