Method for accurate testing performance of pressure concentration-temperature of hydrogen storage material

Abstract

This invention is a kind of method to measure the H2 storing material's PCT curved line. Especially it offers a kind of precise testing method which has wide use area to measure the H2 storing material's PCT curved line. This invention uses the volume method, that is to say, we will calculate the amount of H2 absorbed of the H2 storing material corresponding to different H2 pressure according to MBWR equation by continuously recording each part of pressure and temperature of H2 during the process of the H2 storing material absorbing or sending out H2, so as to get PCT curved line. After that we will realize the compression divisor's whole process of calculating and drawing picture by computer programming. As this invention has thought about the effect of the H2 storing room's temperature fluctuating, the PCT curved line will still be credible as though part of the room can not realize stable temperature. To sum up, this invention has good use value, making the instrument simple and easy to operate. At the same time we get higher degree of belief when we check the PCT curved line of carbon Nanometer pipe and V and so on which is the H2 storing material having high balance pressure.

Description

technical field [0001] The invention is a method for measuring the pressure-concentration-temperature (PCT) curve of the hydrogen storage material, and particularly provides an accurate test method for determining the PCT curve of the hydrogen storage material with a wide application range. Background technique [0002] Commonly used methods for determining PCT curves include volumetric and mass methods. [0003] The principle of the volumetric method is to calculate the change of the hydrogen content of the hydrogen storage material according to the pressure of the hydrogen storage material sample chamber and the gas storage chamber with a predetermined volume. Continuously measure the change of hydrogen filling or hydrogen discharge pressure in a fixed volume and cumulatively calculate the change of hydrogen concentration in the hydrogen storage material, and obtain the PCT curve according to the state equation of hydrogen. When measuring the PCT curve of the hydrogen cha...

AI Technical Summary

Problems solved by technology

However, this method requires a huge investment in equipment and requires a high-resolution quartz oscillating microbalance

[0005] The method reported in the Chinese patent application "A Test Method for Pressure Concentration Temperature Performance of Hydrogen Storage Alloy, Application No.: 02109169.2" is only applicable to the measurement of PCT curve of hydrogen storage materials with low pressure or ultra-low pressure

And Chinese patent application " a kind of hydrogen storage alloy pressure concentration temperature performance test method, application number: 02109169.2 " and " rare metal ", 1997,21 (1), the simple and easy measurement of hydrogen storage alloy PCT curve, the method of report all adopts ideal Equation of state to measure, this method is less accurate

Especially when the equilibrium pressure is high and the temperature is low, the actual hydrogen state equation has a large deviation from the ideal state equation. At this time, if the ideal state equation is still used to measure the PCT curve of the hydrogen storage material, it will inevitably cause a large error.

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