Manufacturing method and manufacturing apparatus of syngas, and manufacturing method of liquid hydrocarbon using the same

A method for reducing greenhouse gas emission in the manufacture of syngas, the method comprising the steps of:

• (S1) heat-treating organic waste in a first reactor to produce a first mixed gas, which comprises methane, hydrogen, carbon monoxide, and carbon dioxide;
• (S2) introducing the first mixed gas to a second reactor and subjecting it to methane reforming in the presence of a catalyst to produce a second mixed gas;
• (S3) separating the catalyst and carbon dioxide from the second mixed gas and recovering a third mixed gas from which the catalyst and the carbon dioxide have been removed;
• (S4) introducing the carbon dioxide separated in step (S3) to a third reactor and converting the carbon dioxide into carbon monoxide through a reverse Boudouard reaction;
• and
• (S5) mixing the third mixed gas recovered in step (S3) and the carbon monoxide converted in step (S4) to produce syngas,
• wherein (S4) further comprises the steps of:
• (S4-1) introducing the catalyst separated in step (S3) to the third reactor and regenerating the catalyst through a reverse Boudouard reaction;
• and
• (S4-2) recirculating and resupplying the regenerated catalyst to step (S2).