2004, Volume 7, Issue 13+14
Nitric Oxide Reduction by Carbon Monoxide over Supportes Cobalt-Palladium Catalyst
National Research Institute of Cryogenics & Isotopic Technologies, Rm. Valcea, Romania
The selective catalytic reduction of NOx with carbon monoxide is one of the most challenging tasks in catalysis research with tremendous economical and social Impact. Removal of nitrogen oxides and carbon monoxide from stationary and mobile combustion sources has became, in fact, increasingly important throughout the last decades due to inccreased environmental awareness and stringent pollution legislation. An over-exchanged CoPd/ZMS has recently been shown to possess very promising properties as deNOx and deCO catalysts [1,2]. Besides a higher activity than CuPd/ZMS, it is foremost its insensitivity towards the presence of H2O and SO2 as well as its exceptional hydrothermal stability that make it stand out among the other zeolite-based catalyst systems [3-6]. The preparation of CoPd/ZMS and CuPd/ZMS using ion-exchange methods these comprehensive physico-chemical characterization and the understanding of the reaction mechanisms are the main goals of this work. The reactivity of nitric oxide with reducing gas as carbon monoxide or hydrocarbons using supported cobalt-palladium catalysts is reviewed and assessed in comparison with the use of copper-palladium catalysts. Applications for this technology in the purification of exhaust gases are envisaged.
Cobalt-palladium catalyst, zeolite, carbon monoxide, nitric oxide, hydrocarbons.
Tag search Cobalt-palladium catalyst zeolite carbon monoxide nitric oxide hydrocarbons