Coal bed gas cracking catalytic hydrogen production device and method

The invention discloses a coal bed gas cracking catalytic hydrogen production device and method, and belongs to the technical field of hydrogen preparation. The device mainly comprises a coal bed gas hydrogen production reaction device, a hydrogen purification device, a pure hydrogen storage tank, a catalyst reactivation device and a nano carbon material collection device; wherein the method includes: carrying out catalytic cracking reaction on the desulfurized coal bed gas to generate hydrogen and a nano carbon material; purifying the generated hydrogen to obtain high-purity hydrogen, and carrying out circular reaction on the purified tail gas until the methane contained in the tail gas is completely converted; adsorbing the generated nano carbon material on the surface of the metal composite catalyst sieve; and after the reaction is completed, reactivating the catalyst by using an ultrasonic technology, and drying and collecting the product to obtain the high-purity nano carbon material. The device is simpl