A method for measuring hydrogen isotope separation factor

Abstract

The invention discloses a method for measuring a hydrogen isotope separation factor. The method comprises the steps of 1, taking gas containing a deuterium isotope out of a standard tank, and recording pressure P0; 2, enabling a fixed bed reactor to absorb the gas containing the deuterium isotope till approaching saturation, and recording pressure P1; 3, taking the fixed bed reactor from a separation factor testing system and placing the fixed bed reactor into a constant temperature tank; 4, intermittently and repeatedly vibrating the fixed bed reactor in an upside-down mode to obtain a balance gas phase sample; 5, connecting the fixed bed reactor back to the separation factor testing system to vacuumize the system; 6, filling a system pipeline with the gas inside the fixed bed reactor, and rapidly shutting down the fixed bed reactor; 7, recording pressure P2, and collecting a balance gas phase sample; 8, obtaining the deuterium concentration y in the balance gas phase sample and working out the deuterium concentration x in a solid phase; 9, calculating a hydrogen isotope separation factor alpha. The method is convenient and rapid to implement, low in cost, and quite suitable for measuring the hydrogen isotope separation factor.

Description

technical field [0001] The invention relates to a method for measuring the equilibrium distribution coefficient of the hydrogen isotope between the two phases, that is, the separation factor, when the gas-solid two-phase reaction between the hydrogen isotope and the solid phase material reaches equilibrium. Background technique [0002] In the reaction between hydrogen isotopes and solid-phase materials, due to the thermodynamic isotope effect, different hydrogen isotopes (such as protium and deuterium) will have different stability in the solid phase. This difference in stability is the theoretical basis for many hydrogen isotope separation methods. In order to quantitatively describe this difference, most researchers use the concept of separation factor. Simply put, the separation factor is the isotope concentration ratio between the gas-solid two phases at equilibrium, which can be expressed mathematically as: where α represents the separation factor, x represents the ...

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Problems solved by technology

However, gas circulation pumps are very expensive, and are subject to import and export restrictions in some developed countries

In addition, laser analysis method can also be used to measure the separation factor in situ, but this requires very expensive laser equipment and matching online mass spectrometry equipment

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