Nano-crystallite binder based co combustion promoter

A process for preparation of a particulate CO oxidation promoter catalyst composition, the process comprising:

• (a) reacting a nano-crystallite alumina with a dispersant to obtain a composite binder;
• (b) milling and homogenizing large crystallite low surface area alumina with the composite binder to obtain a precursor slurry;
• (c) spray drying the precursor slurry to obtain a particulate green catalyst;
• (d) calcining the green catalyst to obtain a calcined alumina support, and
• (e) impregnating the calcined alumina support with at least one of platinum or palladium to obtain the particulate catalyst composition.