The invention discloses a differential automatic test
system for
photocatalytic reaction, which comprises a reaction part, a circulation part, a
pressure control part, a
temperature control part and a measurement control part. The reaction part comprises a
magnetic stirrer, a reactor, a
xenon light source and the like; the circulation part comprises a gas circulation pump, a spherical glass condenser tube, a
gas chromatography, a reactor, a pneumatic
pipe and the like; the
pressure control part comprises a gas
mass flowmeter, a flow stabilizing valve, a digital pressure gauge, a
vacuum pump and the like; the
temperature control part comprises a constant-temperature circulation pump, a reactor
temperature control jacket, a spherical glass condenser tube and the like; and the measurement control part comprises a continuous analyzer, a
gas chromatography, a
data acquisition board, a computer and the like. The
system is used for photocatalytic
hydrogen production test, and adopts carrier gas to bring out gas products in the reactor, thereby realizing the
differential measurement. Moreover, the
reaction temperature and the reaction pressure can be set, the instant
hydrogen production rate in the
photocatalytic reaction can be accurately and promptly obtained, and the
system can be used in the test of
photocatalytic reaction with involvement or production of other kinds of gases.