What is the nature of adsorption in nitrogen adsorption?

what is

Adsorption

? What is the difference between it and absorption?
? ? The gas and liquid on the solid surface are automatically aggregated on the solid surface to reduce the surface energy. The phenomenon that the concentration of a gas or liquid on a solid surface is higher than its bulk concentration is called surface adsorption of a solid. The process of adsorbing surrounding gas molecules across the solid surface is called gas adsorption. Monitoring the gas adsorption process has proven to provide a wealth of useful information about solids characteristics. ?
When the molecules of the adsorbed material penetrate the surface layer and enter the structure of the loose solid, this process is called absorption. sometimes,
It is difficult, if not impossible, to distinguish the difference between adsorption and absorption, so that the term "sorption", which is more convenient or more widely used, encompasses both adsorption and absorption, and the terms derived therefrom: Sorbent, sorbate and sorbent or sorptive. ?
When adsorption is used to represent a process, its corresponding inverse process is desorption.
During the desorption process, due to the thermal motion of the molecules, the energetic molecules can break away from the binding force and leave the surface, and the amount of adsorption gradually decreases. The terms "adsorption" and "desorption" were later used as adjectives to indicate the experimental study of the amount of adsorption, ie the adsorption curve (or point) or the desorption curve (or point). When the adsorption curve and the desorption curve do not coincide, adsorption hysteresis occurs. ?
Everything is made up of molecules, which form the basis of the molecule. Gaseous atoms and molecules move freely.
In contrast, in the solid state, atoms are in a fixed position due to electrostatic attraction between adjacent atoms. However, the outermost layer (or surface) of the solid has fewer adjacent atoms around the inner layer of atoms. The imbalance of the force of this outermost atom leads to the generation of surface energy. The atoms on a solid surface, like liquids, are not uniformly stressed, but unlike liquid surface molecules, they can move, but are positioned. Therefore, most solids have a higher surface energy than liquids. To compensate for this electrostatic gravitational imbalance, surface atoms adsorb gas molecules in the surrounding air. When a particle is cut into an ultrafine powder, the surface area is rapidly increased, resulting in extremely high surface energy, resulting in agglomeration or aggregation between particles (solid-solid action) to lower the surface energy.

Bested

instrument

Technology (Beijing) Co., Ltd. is a professional manufacturer of professional physical adsorption analysis instruments. It is a national high-tech enterprise integrating R&D, production, sales, technical support and after-sales service. Bethes Instruments has an independent factory building area of ​​over 5,000 square meters. The company has a registered capital of 5 million RMB and its scale is far ahead in China.
The 3H-2000 series of physical adsorption analysis instruments developed by Bethes Instruments are developed for domestic famous brands and developed from the 3H-2000 model that entered the market in 2000. After years of continuous research and development and innovation, the performance has reached domestic leading and international advanced. Level, many of which exceed the imported instruments, is a model of high-precision physical adsorption instruments in China.
Bestech has a professional technical team and has won 30 technical patents; Beijing High-tech Enterprise with new technology patents in 2009; ISO9001 National Quality System Certification in 2011; Beijing Municipality in April 2012 Supported by the Innovation Fund; in October 2012, it was supported by the Innovation Fund of the Ministry of Science and Technology;
In May 2011, the Shanghai office and laboratory were established; in September 2012, the Guangzhou office and laboratory were established; in October 2016, the Wuhan office and laboratory were established; the office laboratory was equipped with prototypes of various models. Can be tested in the field; each office has 2-3 technicians and sales engineers, which can provide technical services to customers in a timely and convenient manner;
In 2015, with the continuous development of the company's various businesses, the old factory can no longer meet the needs of production and research and development. The new site factory provides more modern production conditions, more advanced production equipment and comfortable and pleasant office environment. The factory set production office, production debugging room, high pressure adsorption laboratory, steam adsorption laboratory, dust-free laser micro-welding chamber, helium mass spectrometry Leak detection room, analysis and test center, conference room, warehouse, staff restaurant, staff activity room, etc. The good research and development environment, production environment, testing environment and related supporting facilities of the new factory provide guarantee for excellent instrument quality, and continue to grow for the future development.

Enterprise strength

Laid a solid foundation.
In the after-sales service, we have established a vigorous service team, and 10 full-time service engineers provide installation and commissioning training services for users. In order to improve service timeliness and shorten service radius, Bethes Instruments has offices in Shanghai, Guangzhou and Wuhan, and 90% of users can reach the instrument use site within 24 hours. In addition, the company implements a free warranty-free warranty system during the warranty period, a free software upgrade system, a regular return visit system, etc., eliminating the worries of users.