Methanol reforming denitration over an integrated bifunctional CuZnOx–X–MnPdOz@Ni catalyst at low temperature

Abstract

Severe conditions involved in hydrogen storage and transportation limit the practical applications of hydrogen denitration reaction. In this paper, we developed a new process that consists of methanol steam reforming inline hydrogen production coupled with denitration, which reduces the threshold use of hydrogen. The bifunctional CuZnO_x–X–MnPdO_z@Ni catalyst prepared in this paper could achieve inline hydrogen production through the CuO_x center and reduce NO_x by the MnPdO_z center. The optimal CuZnO_x–CeZrO_y–MnPdO_z@Ni candidate catalyst could maintain over 90% denitration efficiency under conditions: GHSV = 22 000 h⁻¹ + n_methanol : n_water = 1 : 1.3 + 800 ppm NO at 150 °C. We conducted various characterization methods to reveal the valence state distribution of the promising catalyst. The experimental results indicated that the inline hydrogen selective catalytic reduction of NO is a promising strategy for green, efficient, and sustainable NO_x control technology.