Fuel reformer

A fuel reformer, comprising:

• a reaction container including a first chamber;
• a first reactor in the first chamber, the first reactor:
• including a first catalyst,
• being configured to produce a first reformate by performing a steam reforming reaction on a first fuel, and
• having a first volume and a first gas hourly space velocity (GHSV), the first GHSV being calculated by dividing a set flow rate by the first volume;
• a first heat source thermally connected to the first reactor;
• a second reactor connected to the first reactor, the second reactor:
• including a second catalyst,
• being configured to produce a second reformate having a lower carbon monoxide content than the first reformate, and
• having a second volume and a second GHSV greater than the first GHSV, the second GHSV being calculated by dividing the set flow rate by the second volume;
• and
• a third reactor connected to the second reactor, the third reactor:
• including a third catalyst,
• being configured to produce a third reformate having a lower carbon monoxide content than the second reformate, and
• having a third volume and a third GHSV lower than the second GHSV, the third GHSV being calculated by dividing the set flow rate by the third volume.