شماره ركورد كنفرانس :
5048
عنوان مقاله :
One-dimensional Pseudo-homogeneous Modeling and Simulation of Autothermal Reformer
Author/Authors :
A ،Shamkhali Chemical Engineering Department - Tarbiat Modares University - Tehran, Iran , M.R ،Omidkhah Chemical Engineering Department - Tarbiat Modares University - Tehran, Iran , J ،Towfighi Chemical Engineering Department - Tarbiat Modares University - Tehran, Iran , M.R ،Jafari Nasr
كليدواژه :
Autothermal Reforming , Synthesis gas , Modeling , Pseudo-homogeneous
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
Autothermal reformer (ATR) usually consists two separate sections: Combustion section and bed
section. Namely combustion section model includes atomic mass balances of species, equilibrium equation
for water-gas-shift (WGS) reaction and considering some reaction progress for methane steam reforming
(MSR). Calculation starts with the assumption of equilibrium for MSR then by departing from equilibrium
temperature, concentrations at the end of this section are computed. For bed section, a one–dimensional
pseudo-homogeneous model is assumed. Pressure, temperature and concentration gradients along the bed
are determined. Effectiveness factors (η) are small values and considered to be constant. It has been shown
that their variations have little effect on results. Therefore pseudo-homogeneous model can be used
confidently. Intrinsic kinetics is considered for MSR and WGS. Heat losses from reactor wall are taken into
account. The results of the model are in good agreement with industrial data available in literature. By taking
η as constant and neglecting particle equations, model becomes very simple, but fortunately fast and
practically accurate, and can confidently be used for simulation of industrial reactors. If there is no interest in
knowing temperature and composition change inside the reactor, only simple and very fast equilibrium
calculations are required since all reactions are always near equilibrium at ATR outlet.