Methane production system

A methane production system, comprising:

• a raw material gas supply part configured to store and supply a raw material gas;
• a catalyst supply part configured to store and supply a catalyst;
• a methanation reaction part connected to the raw material gas supply part and the catalyst supply part and configured to generate a reaction gas by performing a methanation reaction using the raw material gas and the catalyst supplied from the raw material gas supply part and the catalyst supply part;
• a temperature measurement part connected to the methanation reaction part and configured to measure a temperature of the methanation reaction part;
• a temperature maintaining part connected to the raw material gas supply part and configured to maintain the temperature of the methanation reaction part at a predetermined temperature based on the temperature of the methanation reaction part measured by the temperature measurement part;
• and
• a raw material gas injection part connected to the raw material gas supply part to receive the raw material gas from the raw material gas supply part and configured to inject the raw material gas into the methanation reaction part at a flow rate higher than a flow rate at which the raw material gas is supplied from the raw material gas supply part.