3-D modeling of SCR of NOx by NH3 on vanadia honeycomb catalysts
B. Roduit , K. Baiker , F. Bettoni , Jerzy Robert Bałdyga , A. Wokaun
AbstractA novel scheme for simulating the selective catalytic reduction of NO with NH3 on a honeycomb-type catalyst was developed based on a 3-D model. New insight was gained by considering such modeling aspects as: correct geometry (square ducts); hydrodynamic entrance effects; occurrence of adsorption phenomena and side reactions; NH3/NO ratio in the feed; influence of the reactant (NO, NH3, O2, H2O) concentrations; interphase diffusion and interphase mass-transfer processes; and a large range of operating conditions (temperature 140–475°C and gas hourly space velocity 14,800–73,900 h−1). These aspects proved to be crucial for interpreting and quantifying the experimental results and optimizing the catalytic reactor processes. The 3-D model was validated by comparing manufacturer's set point and experimental data to calculated data, and the external mass-transfer coefficients derived from the concentration gradients to the mass-transfer correlations available in the literature.
|Journal series||AICHE Journal, ISSN 0001-1541|
|Publication size in sheets||0.65|
|Publication indicators||: 2006 = 2.153 (2) - 2007=2.052 (5)|
|Citation count*||27 (2015-03-28)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.