Hydrocarbon production apparatus and hydrocarbon production method

A hydrocarbon production apparatus comprising:

• a synthesis gas production unit structured to produce a synthesis gas containing carbon monoxide and hydrogen by using carbon dioxide and hydrogen, wherein the synthesis gas also contains carbon dioxide;
• a hydrocarbon production unit structured to produce a hydrocarbon by using the synthesis gas;
• and
• a first separator structured to separate a recycle gas containing a light hydrocarbon having 4 or less carbon atoms from an effluent from the hydrocarbon production unit;
• a second separator structured to separate carbon dioxide from the synthesis gas, wherein the carbon dioxide separated by the second separator is directly supplied to the synthesis gas production unit;
• a reformer structured to reform the light hydrocarbon into methane;
• and
• a product production unit structured to receive supply of the hydrocarbon from the hydrocarbon production unit and produce a hydrocarbon product,
• wherein
• the synthesis gas production unit is structured to receive supply of the recycle gas and also use the recycle gas for production of the synthesis gas;
• the synthesis gas production unit is structured to receive supply of the carbon dioxide separated by the second separator and use the carbon dioxide for production of the synthesis gas;
• the synthesis gas production unit is structured to receive supply of the methane generated by the reformer and also use the methane for production of the synthesis gas;
• the product production unit is structured to by-produce the light hydrocarbon together with the hydrocarbon product;
• and
• the reformer is structured to receive supply of the light hydrocarbon from the product production unit and also reform the light hydrocarbon into methane.