Brunauer, Emmet, Teller nitrogen adsorption

Method to determine the specific surface with nitrogen adsorption following Brunauer, Emmet, Teller. 

Nitrogen BET (Brunauer-Emmet-Teller) adsorption is a reliable method for determining the specific surface and pore volume [76]. Evaluation of the specific surface area using the BET method is based on several assumptions that deviate from the behavior of adsorbed molecules on the real surfaces. Despite the cer-... 

The specific surface area of ACC was calculated according to Brunauer, Emmet, Teller method using the linear part of the nitrogen adsorption isotherm shown in Fig. 21.2. Sgg.j, was determined as 1,870 m g . The total volume of pores. 

We studied the surface characteristics of palygorskite and its organocomplexes first by nitrogen adsorption at standard temperature and pressure (STP). The isotherms are shown in Fig. 15. According to Brunauer s, Emmet s and Teller s classification, the isotherm determined on palygorskite is of type IV and exhibits adsorption hysteresis. An... 

Surface areas are usually determined by gas adsorption (nitrogen or krypton) and although there are a number of theories describing this phenomenon, the most widely used method is the Brunauer, Emmet and Teller, or BET, method. Adsorption methods for surface area determination have been reviewed in detail by Sing (1992). Two methods are used the multipoint and single-point. 

Eigure 5.6 shows an isotherm obtained from nitrogen absorption measurements of TIMREX SEG44, which is a typical highly crystalhne graphite. The shape of the graphite adsorption isotherm according to the Brunauer, Emmet, and Teller theory as well as... 

Granulation properties are mainly dependent on the size and surface area of particles and granules (24,25) The surface area of a granule or particle can also affect the dissolution rate of a solid. Gas adsorption is the most common method to determine surface area, although liquid penetration methods have also been proposed (26). In one of the methods developed by Brunauer, Emmet, and Teller, called the BET method (27), an inert gas is adsorbed onto the surface of a solid at low temperature and then desorbed at room temperature (1). Either nitrogen or krypton is used as the adsorbate, and helium is usually used as a carrier gas for the adsorbate. Various concentrations of adsorbate in carrier gas are used in this analysis to determine the volume of gas that is adsorbed in a monolayer on to the solid. Eq. 2.1 is used to determine this value... 

The preceding principle is utilized in the Brunauer, Emmet, and Teller (BET) method. This method is used to find the particle size by finding the surface area. In this method, the experiment is conducted at liquid nitrogen temperature. The gas used for adsorption is also nitrogen. The BET equation is used to calculate the volume of the nitrogen adsorbed. This is given by Equation 12.36. 

Nitrogen sorptiometry, also referred to as BET method (named after their inventors Brunauer [202], Brunauer and Emmet [203], and Teller and coworkers [204]), is an approach for the determination of the specific surface area of a (porous) support material based on the multilayer adsorption of nitrogen at the temperature of liquid nitrogen (77 K) according to following procedure ... 

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