Accession Number : ADA297375

Title :   Pulsed DC and Anode Depolarization in Water Electrolysis for Hydrogen Generation.

Descriptive Note : Final rept. Mar 90-Nov 92,

Corporate Author : AIR FORCE CIVIL ENGINEERING SUPPORT AGENCY TYNDALL AFB FL ENGINEERING AND SER VICES LAB

Personal Author(s) : Shaaban, Aly H.

PDF Url : ADA297375

Report Date : AUG 1994

Pagination or Media Count : 77

Abstract : This research effort investigated the effects of anode depolarization and pulsed DC on the performance of the water electrolytic process for hydrogen generation. An experimental approach was implemented using the Fm01-LC electrolytic cell manufactured by ICI Chemical & Polymers Company. The Fm01-LC had a stainless steel cathode and platinum-coated titanium anode. Using a 10 percent by weight sulfuric acid as an electrolyte, the experimental results show that significant improvement in the performance of the water electrolysis is feasible. The anode depolarization process has the potential of improving the water electrolysis performance up to three times that of the conventional water electrolysis. On the other hand, Using pulsed DC caused current polarity reversal during the off period of the pulse. Placing a diode in the circuit prevented the polarity reversal but allowed the electrolytic cell to maintain a DC voltage level of 2.3 volts. The results of pulsed DC are in conflict with those reported in the literature. A basic research program is proposed to investigate the effects of pulsed DC, anode depolarization with the use of the state-of-the-art 3-D ultramicroelectrodes. jg p.3

Descriptors :   *WATER, *HYDROGEN, *PULSES, *DEPOLARIZATION, *DIRECT CURRENT, *ELECTROLYSIS, DIODES, EXPERIMENTAL DATA, STAINLESS STEEL, VOLTAGE, COATINGS, CATHODES, REVERSIBLE, WEIGHT, PLATINUM, TITANIUM, CIRCUITS, ELECTROLYTES, GENERATORS, POLARITY, SULFURIC ACID, ELECTROLYTIC CELLS, ANODES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy
      Optics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE