Method and apparatus for producing solid hydrogen

Details Method and apparatus for producing solid hydrogen Method and apparatus for producing solid hydrogen

1981-11-12

1983-06-07

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 40, F25J 102

Patent

active

043869505

ABSTRACT:
A diamond-anvil, high-pressure cell having an apertured steel gasket interposed between the opposed diamonds is lowered into a liquified hydrogen bath at cryogenic temperatures. After the liquid hydrogen permeates the cell through the viewing apertures an initial sealing pressure is applied to the cell by a remotely operated threaded arrangement sufficient to prohibit escape of the liquified hydrogen from the aperture in the steel plate which is closed by the opposed diamonds. The cell is then typically removed from the liquified hydrogen bath and introduced into a lever type pressure applicator to further increase the pressure on the hydrogen at room temperature for the observation of its effects through suitable apertures in the cell and to convert the same to solid form.

REFERENCES:
patent: 3690116 (1972-09-01), Cheng et al.
Physics Today, Dec. 1939, p. 35.
Temperature-Entropy Diagram for Parahydrogen.
Physical Chemistry, Walter J. Moore, 3rd Ed., pp. 102, 103, 1962.
Annual Report of the Director Geophysical Laboratory, Carnegie Institution, 1977-1978, pp. 904-913.
Science News, p. 156, Mar. 10, 1979, pp. 181, 182, Sep. 18, 1976.

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