Continuous fixed-bed catalytic reactor and catalytic reaction method using same

A continuous fixed-bed catalytic reactor comprising:

• an inflow path for raw material gas for a catalytic reaction and an outflow path for reformed gas;
• a catalytic reaction container that is connected to the inflow path and the outflow path and holds a clumpy catalyst, the clumpy catalyst having external dimensions of 5 mm to 50 mm;
• a catalyst holder that has a ventilation property and holds the clumpy catalyst;
• and
• a driving mechanism that moves the clumpy catalyst up and down by moving the catalyst holder up and down,
• wherein a space for storing a solid or liquid foreign substance generated in a catalyst layer is provided below the catalyst layer;
• wherein the catalyst layer is a collection of clumpy catalyst particles.