US 7,888,282 B2Granted

Catalyst for manufacturing synthesis gas and method of manufacturing synthesis gas using the same

AssigneeChiyoda Corporation

InventorsTakeshi Minami, Kenichi Imagawa, Atsuro Nagumo, Tetsuro Matsumura

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Abstract

A catalyst for manufacturing synthesis gas has a carrier and a Group VIII metal carried by the carrier. The carrier contains a first ingredient, a second ingredient and a third ingredient. The first ingredient is an oxide of at least an alkaline earth metal selected from the group of magnesium, calcium, strontium and barium. The second ingredient is an oxide of at least an element selected from the group of scandium, yttrium and lanthanoids. The third ingredient is zirconia or a substance containing zirconia as principal ingredient and has a solid electrolytic property. The carrier may be formed by forming an overcoat film on a substrate by coating. Then, the overcoat film contains the above three ingredients. A catalyst according to the invention can remarkably reduce the dimensions of the reaction facility and improve the energy efficiency of the facility.

Claims17

Dependent claims

A catalyst for manufacturing synthesis gas containing carbon monoxide and hydrogen as principal ingredients from feedstock gas containing hydrocarbon having 1 to 5 carbon atoms in each molecule and oxygen, characterized in that

the catalyst for manufacturing synthesis gas has an aluminum-free carrier and a catalyst metal carried by the carrier;
said catalyst metal comprising at least a Group VIII metal including at least rhodium;
said carrier containing a first ingredient, a second ingredient and a third ingredient;
said first ingredient being an oxide of at least an alkaline earth metal including at least magnesia;
said second ingredient being an oxide of at least an element selected from the group of scandium, yttrium and lanthanoids including at least ceria;
said third ingredient being zirconia or a substance containing zirconia as principal ingredient and having a solid electrolytic property,
wherein the molar ratio of said second ingredient relative to said first ingredient is between 0.10 and 0.25 and the molar ratio of said third ingredient relative to said first ingredient is between 0.3 and 0.6.

4 more elements

Dependencies are inferred from the claim text.