A mathematical model and the corresponding software for combining selective catalytic reduction with regenerative heat exchange

Zhongjun Tian and Shipin Jin*

Abstract

In order to achieve dual goals of waste heat recovery and nitrogen oxides (NOx) removal in fuel gas from High Temperature Air Combustion (HiTAC) furnaces and coal-fired boilers in power plants, the honeycombed Selective Catalytic Reduction (SCR) catalysts were implanted in the regenerative heat exchange system. Under the premise of ignoring the influence of catalytic reaction on the heat transfer process, the single channel one-dimensional mathematical model for catalytic reduction and regenerative heat exchange of NO was established at unsteady state, in which the adsorption and reaction of reactants obeyed the Eley-Rideal Mechanism. With governing equation dispersion via the finite-volume method and calculation program compiled based on C# language in Visual Studio 2010, a corresponding calculation software was developed. The preliminary analysis of simulation results validated the rationality of the model.