The activated carbon-based desulfurization process is a promising method for elimination of SO2 from exhaust gases of fuel-fired power plants.
This report presents the results of numerical simulations of SO2 removal using a cross cur-rent moving bed adsorber and comparisons with experimental data from a pilot scale plant (capacity: 10000Nm3/h).
Repeated use of the activated caebon, and heating in an inert gas at 673-723K resulted in a gradual decrease of the SO2 adsorption rate.
Our numerical analysis correlates the change of adsorption rate with the accumulated amount of adsorbed SO2.
The SO2 adsorption rate was determined to be
dQ/dt= [SO2] e· [O2] n. [H2O] m. exp (-/RT) {K1 (Qs-Q) +K2Q},
(e=0.79, n=0.49, m=0.41, E=-2.5)
Where values of K1, K2 and Qs are given for various amounts of accumulated amount of adsorb-ed SO2.
The numerical model was based on two equations for SO2 adsorption rate and a mass balance for the cross current moving bed adsorber.
Computed results agree well with experimental data.
