Influence of the exchanged metal ions (Cu, Co, Ni and Mn) on the selective catalytic reduction of NO with hydrocarbons over modified ferrierite

Abstract

This article presents the research results concerning the possibilities of natural zeolite-ferrierite application for the reduction of nitrogen oxide. H-FER forms were modifi ed by Cu +2 , Co +2 , Mn +2 , Ni +2 using an ion exchange procedure. The effect of metal contents was shown for the ferrierite matrices and related to their catalytic properties. The catalytic properties of Cu-, Co-Ni-, and Mn-were compared for NO reduction with methane. High NO conversion was observed for copper and cobalt-ferrierite catalysts, especially in the temperature range 400 and 500 o C. It was found that copper-and cobalt-ferrierite catalysts have higher activity and N 2 selectivity than the catalysts composed of nickel and manganese doped on ferrierite. Moreover, the nickel and manganese containing catalysts produced more nitrous oxide than nitrogen. The presence of both copper and cobalt species seems to be an indispensable condition for a large activity and selectivity in the NO reduction.

Impact of heating rate and solvent on Ni-based catalysts prepared by solution combustion method for syngas methanation

“…Ru-based catalysts retain the best active for syngas methanation, but limited resource and high cost restrict their large-scale commercialization 6-8 . Ni-based catalysts have been widely used for their low cost, high catalytic activity and selectivity for methane [9][10][11] . In recent decades, great efforts have been made to produce high-effi ciency catalysts retaining high activity at low-temperature (ca.…”