In order to diminish nitrogen oxides(NOx)emissions from high temperature air combustion(HiTAC)furnaces,selective catalytic reduction(SCR)honeycomb catalysts were placed in the regenerative heat exchanger.The experiments of the coupled system were done under unsteady state conditions.Results indicate that catalysts react as high quality regenerators.Outlet NO volume fraction varies periodically with time,including a linear decrease part.Coupled system can achieve heat recovery and NOxremoval of flue gas.NO v...