Fuel reforming method and system

A fuel reforming method of obtaining reformed hydrogen rich fuel from a carbon-containing fuel and steam, comprising:

• a fuel reforming/carbon dioxide separation step of supplying the carbon-containing fuel and steam to a reactor filled with a fuel reforming catalyst which promotes a fuel reforming reaction by which the carbon-containing fuel and steam react with each other to produce carbon dioxide and hydrogen, and a carbon dioxide absorbent capable of irreversibly absorbing and discharging carbon dioxide, and setting the carbon dioxide absorbent at an absorption temperature, thereby converting the carbon-containing fuel into reformed fuel, and separating carbon dioxide from the reformed fuel by allowing the carbon dioxide absorbent to absorb carbon dioxide;
• an absorbent regeneration/heat storage step of obtaining a product gas by oxidizing at lease one of a portion of the reformed fuel and the carbon-containing fuel with an oxidizer, and heating, with this product gas, the carbon dioxide absorbent which has absorbed carbon dioxide to a regeneration temperature, thereby regenerating the carbon dioxide absorbent and storing heat in this carbon dioxide absorbent;
• and
• a cooling/fuel reforming step of supplying the carbon-containing fuel and steam to the reactor in which the absorbent regeneration/heat storage step is completed, thereby cooling, to the absorption temperature, the carbon dioxide absorbent heated to the regeneration temperature, and converting the carbon-containing fuel into reformed fuel by heat energy stored in the carbon dioxide absorbent.