Silicon carbide-based catalytic body and process for producing the same

A silicon carbide-based catalytic body comprising:

• a porous body of given shape comprising a second bonded structure formed by bonding a large number of silicon carbide particles as an aggregate and metallic silicon as a binder in a state that a large number of fine pores are present;
• and
• a catalyst containing an alkali metal and/or an alkaline earth metal, loaded on the porous body,
• wherein the catalyst is loaded via a crystalline coating film comprising an oxide and formed on at least part of the surfaces of the silicon carbide particles and/or the metallic silicon, forming the second bonded structure.

A process for producing a silicon carbide-based catalytic body, the process comprising:

• forming a raw material mixture containing silicon carbide particles and metallic silicon into a formed body of a given shape;
• calcinating and firing the formed body;
• heat treating the formed body in an oxygen-containing atmosphere;
• and then
• loading, on the formed body, a catalyst containing an alkali metal and/or an alkaline earth metal,
• to obtain a catalytic body comprising:
• a porous body comprising a second bonded structure formed by bonding a large number of the silicon carbide particles and the metallic silicon in a state that a large number of fine pores are present;
• and
• the catalyst loaded on the porous body via a crystalline coating film comprising an oxide and formed on at least part of the surfaces of the silicon carbide particles and/or the metallic silicon, forming the second bonded structure.