A Study on Carbon Deposition over Ni/Al₂O₃ Catalyst for CH₄/CO₂ Reforming Reaction

Alumina supported nickel owns activity as good as Rh,Ru catalysts for CH₄/CO₂ reforming reaction,it is generally deposited more carbon than that of noble metal catasts,however.The current paper reports characterization of surface deposited carbon on Ni/Al₂O₃ catalys tsusing x-ray photoelectron spectroscopy and pulse reactor.The catalyst,which was treated either by pure methane or by carbon monoxide at 973K, has given out a new carbon species with binding energy of ca.283 6eV.This kind of carbon is assigned to metal carbide carbon.The deposited carbon from either CH₄ or CO could be partly removed by CO₂ treatment.The difference is that the deposited carbon from methane is more activity than that from CO.