Test device and test method

A test device that performs a reaction rate test of a chemical reaction that proceeds in a presence of a catalyst, the test device comprising:

• a sample feeder that feeds a sample to be fed to the catalyst at a preset flow rate;
• a plurality of reaction vessels each including a catalyst layer filled with the catalyst;
• a temperature adjusting mechanism that adjusts a temperature of the reaction vessels;
• a feed side switching valve that connects a feed flow path through which the sample is fed from the sample feeder, to a feed destination reaction vessel selected from the plurality of reaction vessels;
• an outflow side switching valve that connects a sample flow path intended to collect the sample for analysis that has passed through the catalyst layer, to an outflow source reaction vessel from which the sample flows out of the catalyst layer;
• and
• a control unit that performs switching control of the feed destination and outflow source reaction vessels with the feed side switching valve and the outflow side switching valve, such that the reaction rate test is performed under at least three conditions having different residence times in the catalyst layer.