Producing of hydrogen with purity better than 99,999 vol. % is the actual task for development of the technological process of hydrogen making. All present technologies for making of extra pure hydrogen consists, per se, from two main technological processes: making of technical hydrogen with low purity and its cleaning up to high level of purity. Then produced pure hydrogen can be used by consumers or can be accumulated in storage devices or can be compressed in balloons. On this direction the great strides were made (look, e.g., B.G. Timoshevskiy et al., 9 Int. Conf. ICHMS’2005. Sevastopol’, Ukraine, 2005, p. 584-585). It is also known the method of extra pure (purity is 99,9999 vol.%) hydrogen producing by means of thermal decomposition of alcohol vapor on the palladium membrane surface (G.P.Glazunov, et al., Int. J. Hydrogen Energy, (1999), v.24, p.829-831), when super pure hydrogen is generated and is used for puffing in vacuum system in only one technological process.
The main objective of the first stage of the project was to create the working device for investigations of the processes of pure hydrogen generation with the use of diffusion-catalytic membranes and its penetration through such membranes.
As the result of fulfilled works on the project during 2006 year the working device was created with the high vacuum (~2.10-7 Torr) system and mass-spectrometric technique which provided the accuracy improvement during measurements of hydrogen permeation through membranes. The technology was developed to produce diffusion membranes on the base of palladium/nickel tubes. The pilot samples of such membranes were produced for studies of pure hydrogen generation and permeation process. The temperature and pressure dependencies of hydrogen permeation rate and activation energy values of hydrogen penetration through these membranes were determined.
The fulfilled works allowed to carry out on this device in the next years (2007-2009) some experiments on the investigation of pure hydrogen generation from the flame of hydrocarbons combustion (Patent of Ukraine # 86884, 2009). The proposed method could be used in hydrogen energy, thermonuclear fusion researches, chemical, electronic-industry enterprises etc. But it is necessary to investigate in detail the processes on membrane surface and in its volume, to study membrane lifetime under long time flame impact, to create the working device model for hydrogen generation (pure hydrogen generator) and to examine its work. It is supposed to solve these questions in the frame of the next project.
Keywords: pure hydrogen generation, diffusion-catalitic membrane