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Gas diffusivity meter at the solid-air interface
ES2969662
The device consists of a thermally insulated chamber housing one or more vertically arranged cylinders with diameters ranging between 15 and 30 cm. The cylinders have an open top base and a closed bottom base. Load cells are installed at the closed bottom base. Inside the tubes, various solid samples are placed, each adsorbing a specific fluid, such as water, benzene, acetone, or any other substance. The load cells at the base of the tubes allow for the measurement of mass variation over time. The chamber includes a system to circulate air around and above the tubes in either laminar or turbulent flow, with controlled velocity, temperature, and relative humidity. This setup creates a gas concentration gradient from the surface of the solid samples to the top of the tube. The difference in gas concentration between the surface of the solids and the top of the tube induces particle movement by diffusion, following Fick's law. The application of this law enables the calculation of the mass diffusivity of the gas in the air associated with each adsorbent solid.
ADVANTAGES - It is easy to use, with simple technology, to determine the rate at which a fluid transfers from a solid to the air. - It is a device that can be very economical and suitable for a wide range of liquids typically absorbed by solids and transferred to the air by diffusion, such as water, acetone, benzene, hydrocarbons, etc. - It can be applied to evaluate the natural remediation times of soils contaminated with gasoline or volatile liquids. BUSINESS APPLIC>>The sectors that could benefit from this include those within the assembly/distribution link, such as: BUSINESS APPL. - Laboratories specializing in the measurement of physical properties, - Manufacturers of dryers for various materials: wood, leather, fruit, bricks, fabrics, cardboard, and flooring."