Concentration in time of a gas component entrained in a carrier

Heat exchange – Heating and cooling – Heating and cooling of the same material

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55 67, 55197, F28B 2100

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active

044297360

ABSTRACT:
The combination of an electrically conductive hollow body, a step-down transformer operable at a frequency greatly in excess of 1 kHz and solid phase temperature depressing means is used to realize the invention in its method and apparatus aspects. The temperature depressing means serve to bring the hollow body to a given depressed temperature so that when a gas component entrained in a gas carrier with which it forms mixture is passed through the hollow body for a period of, say, a few minutes the gas component condenses in the hollow body. The condensed component may later be freed and re-injected into the carrier by a process of thermal desorption which is achieved by direct ohmic heating of the hollow body via of the step-down transformer. The desorption time would typically extend over some ten seconds or so, as against the condensation time of several minutes, with the result that the gas component is concentrated in time, i.e. the number of molecules per unit time conveyed by the carrier emerging from the hollow body due to desorption is increased compared with the molecules per unit time conveyed by the carrier when entering the hollow body. The hollow body may be permanently thermally coupled to the temperature depressing means or selectively coupled by means of an actuator. The advantages within the context of the combination of using a transformer operating at a much higher frequency than that of the AC public supply are emphasized.

REFERENCES:
patent: 3486298 (1969-12-01), Huebner
patent: 3735565 (1973-05-01), Gilby et al.
patent: 4117303 (1978-09-01), Hedberg

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