Production of hydrogen using atmospheric pressuremicrowave plasma source operated at high flow rate

摘要

In this paper,results of hydrogen production via methane reforming in the atmospheric pressuremicrowave discharge are presented.As the microwave plasma source (MPS)a waveguide-based(nozzleless)cylinder-type plasma generator was used.The important advantages of the presentedwaveguide-based (nozzleless)cylinder-type MPS are:stable operation in various gases (includingair)at high flow rates,no need for any special cooling system and for the impedance matching (forexample,no need for a 3-stub tuner).The methane flow rate was 27 –152 l/min.The plasmageneration was stabilized by an additional swirled nitrogen flow (100 l/min).The absorbedmicrowave power was 2500-6000 W.Production rate of hydrogen and energy efficiency of thehydrogen production using the methane reforming by the waveguide-based (nozzleless)cylinder-type MPS were up to 284 g [H2 ] /h and 68 g [H2 ] /kWh,respectively.