Microwave catalytic NO_x and SO_2 removal using FeCu/zeolite as catalyst

摘要

Non-thermal plasma technology is a promising process for flue gas treatment. Microwave catalytic NO_x and SO_2 removal simultaneously has been investigated using FeCu/zeolite as catalyst. The experimental results showed that a microwave reactor with FeCu/zeolite only could be used to microwave catalytic oxidative 91.7% NO_x to nitrates and 79.6% SO_2 to sulfate; the reaction efficiencies of microwave catalytic reduction of NO_x and SO_2 in a microwave reactor with FeCu/zeolite and ammoniμm bicarbonate (NH4HCO_3) as a reducing agent could be up to 95.8% and 93.4% respectively. Microwave irradiation accen tuates catalytic reduction of SO_2 and NO_x treatment, and microwave addition can increases SO_2 removal efficiency from 14.5% to 18.7%, and NO_x removal efficiency from 13.4% to 18.7%, separately. FeCu/zeolite catalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectrμm analysis (XPS), scan ning electron microscopy (SEM) and the Brunauer Emmett Teller (BET) method. Microwave catalytic NO_x and SO_2 removal follows Langmuir-Hinshelwood (L-H) kinetics.