CATALYTIC ACTIVITY OF CoMgAl,CoAl AND MgAl OF MIXED OXIDES DERIVED FROM HYDROTALCITES IN THE SELECTIVE CATALYTIC REDUCTION OF NO WITH AMMONIA

摘要

Calcined CoMgAl LDHs and a Co-impregnated LDH were characterized by XRD,N_2 physisorption,TPR and ICP elemental analysis,then tested in the selective catalytic reduction (SCR)of NO with ammonia.Cobalt deposited by impregnation on LDH leads to the more active and selective catalyst.On this type of catalyst nearly 80% of conversion and selectivity to N_2 were reached at 578 K with a volume space velocity of 2200 h~(-1).