Adsorption nature

K.J. Chang, O. Talu, Behaviour and performances of adsorptive natural gas storage cylinders during discharge, Appl. Therm. Eng. 

K. Seki, Y. Sumie, Development of adsorptive natural gas storage system—Application to gas holder and natural gas vehicle, in Proceedings of IGRC, Amsterdam, 2001. 

Interaction Type Bond Energy Range (kj/mol) Interaction Class Adsorption Nature... 

From a practical perspective, an isotherm is a graphical representation of how much of a specific contaminant is effectively removed by a given weight of sorbent, and it is a means to this end. It allows the refiner to judge between sorbent efficiencies, i.e., which clay will be more economically efficient. However, from a theoretical interest in studying the nature of adsorption, it is a means to empirically determine the manner by which an adsorbate is removed by the sorbent and mathematically define the adsorptive nature of a sorbent. 

Keywords granular activated carbon adsorption natural organic matter micro-pollutants atrazine water treatment water temperature... 

Keywords equilibrium adsorption natural zeolite activated carbon heavy metals 1. Introduction... 

R. K. Schofield, Calculation of surface areas from measurements of negative adsorption, Nature 160 408 (1947). R. K. Schofield and O. Talibudeen, Measurement of the internal surface by negative adsorption. Disc. Faraday Soc. 3 51 (1948). H. J. van den Hul and J. Lyklema, Determination of specific surface areas of dispersed materials by negative adsorption, J. Colloid Interface Sci. 23 500 (1967). 

The popularity of the cychc voltammetry (CV) technique has led to its extensive study and numerous simple criteria are available for immediate anal-j sis of electrochemical systems from the shape, position and time-behaviour of the experimental voltammograms [1, 2], For example, a quick inspection of the cyclic voltammograms offers information about the diffusive or adsorptive nature of the electrode process, its kinetic and thermodynamic parameters, as well as the existence and characteristics of coupled homogeneous chemical reactions [2]. This electrochemical method is also very useful for the evaluation of the magnitude of imdesirable effects such as those derived from ohmic drop or double-layer capacitance. Accordingly, cyclic voltammetry is frequently used for the analysis of electroactive species and surfaces, and for the determination of reaction mechanisms and rate constants. 

This method can be applied when the adsorptive nature of the matrix may be problematic in extracting a representative sample. The fire debris is placed in a flask and extracted with an organic solvent. The volatile hydrocarbons that are miscible with the solvent are extracted from the debris. Commonly used solvents are carbon disulfide, dichloromethane, pentane, and hexane. The extract is filtered, evaporated to a small volume, and then analyzed. Sensitivity is similar to steam distillation however, interfering substances such as pyrolysis products are also extracted. 

Surfactant adsorption at solid surfaces is, in practice, exploited to facilitate detergency, control wetting and penetration of solutions, stabilize foams and emulsions, and collect minerals in flotation operations. From this list alone, it is clear that this field is of tremendous importance. Consequently, significant effort has been directed toward acquiring a better understanding of the adsorptive nature of different surfactant molecules at solid surfaces. ... 

Essential influence of protein dimerization in bulk and at surfaces on adsorption can be noted because high values of dimerization constants, which are of about only one order of magnitude lower than known average constants of protein adsorption. Natural dimers of protein form due to specific intermolecular interactions as a rule have a higher surface affinity. 

Methods I and 2 are commonly used for regeneration of adsorbents used for gaseous phase adsorption. Naturally, method 2 can be applied for liquid phase adsorption if the equilibrium relation allows in specific cases. Fig. 9.1 shows these schemes of desorption. Desorption using an inert stream free of adsorbent is essentially the same operation as adsorption, which can be analyzed by the same basic equation with different initial, and boundary conditions. The same is true of desorption at high temperature (thermal desorption) except that the equilibrium relation is very different. Also, in the actual operation of thermal desorption, nonisothermal treatment becomes important in most cases. The combination of desorption at low pressure and adsorption at high pressure is the principle of pressure swing operation (PSA), which is discussed in Chapter II. 

The adsorptive nature of the complex was verified by cyclic voltametry. Therefore it is an adsorptive compl c wave. 

An alternative green process for the aziridination of alkenes in an aqueous media involves the utilization of the adsorptive nature of silica gel, by which the removal of a... 

The photostimulated change in the adsorption nature of a polymer may be applied to adsorption chromatography [17]. Figure 9 shows the adsorption of cephalosporin C on the photoresponsive polymeric column and desorption by irradiation with UV light. On passing an aqueous solution of cephalosporin C through the column in the dark, the absorbance of the effluent... 

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