Oxidative adsorption experiment system and method for trace amount of hydrogen in oxygen atmosphere

Abstract

The invention relates to an oxidation adsorption experiment system and method for trace amount of hydrogen in an oxygen atmosphere. The system comprises an oxidation bed, a trace hydrogen analyzer andan adsorption bed which are connected in sequence; the gas source comprises a hydrogen source and an oxygen source which are connected to the inlet of the oxidation bed through a three-way valve to react to generate water; the trace hydrogen analyzer is used for analyzing the concentration of residual unoxidized hydrogen; the adsorption bed is used for adsorbing water generated by reaction. The method comprises the following steps: carrying out oxidation reaction on hydrogen in an oxygen atmosphere to generate water; analyzing the concentration of the residual unoxidized hydrogen and calculating the oxidation efficiency of the corresponding oxidation bed to the hydrogen; adsorbing water generated by the oxidation reaction, and calculating the adsorption efficiency of the adsorption bed according to the mass of the water. The experimental device has the beneficial effects that debugging, calibration, maintenance and the like of analysis equipment are the most time-consuming and labor-consuming steps of related experiments all the time; in the invention, the experimental device is only provided with one analysis device, namely the trace hydrogen analyzer, so that the experimental measurement device is simplified to a great extent under the condition that the precision is ensured.

Description

technical field [0001] The invention belongs to the field of chemical equipment, and in particular relates to an oxidation adsorption experiment system and method of trace hydrogen in an oxygen atmosphere. Background technique [0002] The high-temperature oxidation treatment process for spent fuel elements is an advanced nuclear fuel reprocessing head-end process proposed by the Idaho Laboratory (INL) in the 1960s and 1970s. Between shearing and dissolution of traditional spent fuel reprocessing components, the spent fuel components are calcined at high temperature in an oxidizing atmosphere such as air, oxygen or nitrogen oxides. UO was calcined at high temperature 2 The pellets are oxidized and transformed into U which is easily dissolved by nitric acid 3 o 8 or UO 3 fine powder, using UO 2 The volume of the pellet will increase by 36% after oxidation, and the characteristic of volume expansion force will destroy the cladding and separate it from the pellet. Simulta...

AI Technical Summary

Problems solved by technology

The principle of the trace water analyzer is to use the high hygroscopicity of phosphorus pentoxide to absorb a small amount of water in the gas and then ionize it into hydrogen and oxygen. This method has a particularly large impact on hydrogen and oxygen, and is not suitable for the high oxygen atmosphere of this experiment.

And when doing related tritium removal experiments, it is very complicated to adjust and calibrate the measuring instruments

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