Olefin production device and olefin production method

An olefin production device for producing an olefin from a raw material gas containing methane and oxygen,

• the olefin production device comprising a reactor containing:
• a first catalyst;
• and
• a second catalyst disposed downstream of the first catalyst in a flow direction of the raw material gas,
• wherein the first catalyst is a catalyst in which a zirconium salt or carbonate of an alkali metal, an oxide of an alkaline earth metal, an oxide of one kind of lanthanoid element, a composite oxide containing a lanthanoid element, or a combination thereof is supported on a support,
• wherein
• the second catalyst is a catalyst containing a tungsten oxide, phosphate, or carbonate of an alkali metal,
• the reactor includes a first reactor and a second reactor,
• the first reactor contains a part of the first catalyst and does not contain the second catalyst,
• the second reactor contains the second catalyst and the remainder of the first catalyst which is provided upstream of the second catalyst in the flow direction of the raw material gas, and
• at least one of an oxygen supply line for supplying oxygen into the second reactor upstream of the first catalyst contained in the second reactor in the flow direction of the raw material gas and an oxygen supply line for supplying oxygen into the second reactor between the first catalyst contained in the second reactor and the second catalyst is connected to the second reactor.