Method of and an apparatus for measuring the adsorption and the desorption of a gas adsorbed by a solid sample and the use thereof
US5239482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1990 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0893
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For measuring the adsorption and desorption of a gas adsorbed by a solid sample, a gas pressure drop during the adsorption phase or a gas pressure increase during the desorption phase is programmed in the reservoir circuit 1 from 0.1 to 0.7 Pa per minute by at least one regulating valve V.sub.P1 having a proportional opening, in order to transfer a substantially constant flow of gas to the sample and from the sample to the reservoir, the gas pressure being measured periodically in the measuring circuit by pressure sensors. By a microprocessor, the isotherm of adsorption and desorption is determined based on the volume of the reservoir circuit, the quantity of gas transferred, the gas pressure in the measuring circuit, and the volume of the measuring circuit. The system measures the adsorption-desorption isotherms of a gas from a solid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.