CO oxidation promoters for use in FCC processes
AssigneeEngelhard Corporation
InventorsChandrasbekhar Pandurang Kelkar, Yuejin Li, Rostam J. Madon, Marius Vaarkamp
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Abstract
A composition for controlling CO and NOx emissions during FCC processes comprises (i) acidic oxide support, (ii) cerium oxide, (iii) lanthanide oxide other than ceria such as praseodymium oxide (iv), optionally, oxide of a metal from Groups Ib and IIb such as copper, silver and zinc and (v) precious metal such as Pt and Pd.
Claims33
An additive composition suitable for reducing CO emissions during catalyst regeneration in a fluid catalytic cracking process, said composition comprising (i) an acidic oxide support, (ii) cerium oxide, (iii) at least one oxide of a lanthanide series element other than cerium oxide, wherein the weight ratio of (ii) to (iii) is from about 5:1 to about 20:1, (iv), optionally, at least one oxide of a transition metal selected from Groups Ib and IIb of the Periodic Table and mixtures thereof and (v) at least one precious metal.
A fluid cracking catalyst composition comprising (a) a cracking component suitable for catalyzing the cracking of hydrocarbons, and (b) an additive composition comprising (i) an acidic oxide support, (ii) cerium oxide, (iii) at least one oxide of a lanthanide series element other than ceria, the weight ratio of (ii) to (iii) being from about 5:1 to about 20:1, (iv), optionally, at least one oxide of a transition metal selected from Groups Ib and IIb of the Periodic Table and (v) at least one precious metal, said additive composition being an integral component of the catalyst composition particles, being separate particles from the catalyst component or mixtures thereof and being present in the cracking catalyst in a sufficient CO emission reducing amount.
A method of reducing CO emission during fluid catalytic cracking of a hydrocarbon feedstock into lower molecular weight components, said method comprising contacting a hydrocarbon feedstock with a cracking catalyst suitable for catalyzing the cracking of hydrocarbons at elevated temperature whereby lower molecular weight hydrocarbon components are formed in the presence of a CO emission reduction composition, wherein said composition comprises (i) an acidic oxide support, (ii) at least 0.5 part by weight of cerium oxide per 100 parts by weight of acidic oxide support, (iii) at least one oxide of a lanthanide series element other than ceria, the weight ratio of (ii) to (iii) being from about 5:1 to about 20:1, (iv) optionally, an oxide of a transition metal selected from Groups Ib and IIb of the Periodic Table and (v) at least one precious metal, said CO reduction composition being present in an amount sufficient to reduce said CO emissions.
Dependencies are inferred from the claim text.