Methods of recycling carbon dioxide to the gasification system

A method of recycling carbon dioxide from a first syngas mixture of a gasification system, said method comprising:

• removing carbon dioxide-rich gas from the first syngas mixture in a separation device;
• compressing the carbon dioxide-rich gas;
• producing a second syngas mixture in a gasifier;
• mixing the second syngas mixture and at least a first portion of compressed carbon dioxide-rich gas to form a combined syngas mixture;
• and
• channeling the combined syngas mixture into a radiant syngas cooler to facilitate cooling the second syngas mixture.

A method of recycling carbon dioxide from a first syngas mixture of a gasification system, said method comprising:

• removing carbon dioxide-rich gas from the first syngas mixture in a separation device;
• compressing the carbon dioxide-rich gas;
• producing a second syngas mixture in a gasifier;
• mixing the second syngas mixture and at least a first portion of the compressed carbon dioxide-rich gas to form a combined syngas mixture;
• and
• channeling the combined syngas mixture to a convective syngas cooler to facilitate cooling the second syngas mixture.