NOx removal catalyst and how to remove NOx from combustion exhaust gas using this catalyst

摘要

The present invention relates to a process for catalytic reduction of nitrogen oxides contained in exhaust gases exiting combustion, including contacting the combustion exhaust gases with beta zeolite exchanged with an appropriate amount of cobalt salt in the presence of light hydrocarbons as reducing agents.;The invention also relates to a catalyst comprising beta zeolite exchanged with a cobalt salt, characterized in that the Co: zeolite Al molar ratio for use in this process is 0.5.