Method and device for measuring adsorption capacities of materials

Abstract

The invention discloses a method and a device for measuring adsorption capacities of materials. The materials to be measured are processed into cylindrical test samples, the cylindrical test samples are further wrapped with sealing materials and then placed into gas injection measuring units, a gas container and a pressure chamber connected with the gas container through a pipeline are arranged in each gas injection measuring unit, and hydraulic oil is fully injected into each pressure chamber, wherein the device can adopt the plural gas injection measuring units connected in parallel; and the measuring method is as follows: simple calculation is performed through a gas state equation by measuring dead volumes of the gas containers and the pressure chambers in all the gas injection measuring units, as well as gas pressure values before and after gas adsorption so as to get the adsorption capacities of all the test samples against single-component gas, and if the adsorption capacities of the test samples against multi-component mixed gas need to be measured, the contents of all components in the mixed gas after adsorption balance is determined need to be got according to the gas state equation. According to the method and the device, disclosed by the invention, the measurement of the adsorption capacities of a plurality of test samples can be realized once, the measurement of the adsorption capacities against the multi-component mixed gas can be simultaneously performed, and the operation is convenient and fast.

Description

technical field [0001] The invention relates to the technical field of characteristic testing of engineering materials, in particular to a method for measuring the adsorption capacity (adsorption capacity) of engineering materials, and also relates to a device for measuring the adsorption capacity of materials. The method and device can be widely used to measure the adsorption capacity (adsorption capacity) of a single-component gas or a multi-component mixed gas for multiple engineering material samples at the same time. Background technique [0002] Many materials (such as activated carbon, coal, etc.) contain a large number of pores and have a large surface area, so they have the ability to adsorb gases. Different materials have different adsorption capacities for the same gas, and the same material has different adsorption capacities for different gases. , accurate measurement of the adsorption capacity of materials for different gases is of great significance for unders...

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventor found that CN200810197812 has at least the following disadvantages. When measuring the adsorption capacity of the material, only one kind of adsorption material can be measured for the gas adsorption capacity at a time. Two metering pumps and one The differential pressure gauge performs system measurement, which measures the volume of the measured gas before adsorption, the volume of the gas after adsorption and the dead volume of the system, and obtains the gas adsorption amount through the difference between the three gas volumes. The adsorption capacity needs to be measured many times to obtain more accurate data, which requires a long measurement cycle. In addition, the above patents are not yet able to meet the measurement of the adsorption capacity of the measured material on the mixed gas.

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