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Due to the need to develop technologies for nonregenerative adsorptive separation of ethane, propane, and butane from mixtures (1–5%) with natural gas, the molecular dynamics method was used to calculate the dependence of the adsorbed amounts and separation coefficients of the components of binary mixtures of methane with ethane, propane, and butane on the composition of mixtures, temperature, and pressure.

As an addition to previously obtained data, it has been shown that the adsorption isotherms calculated by the molecular dynamics method for components of light hydrocarbon mixtures in micropores of active carbons and on graphene surfaces are quantitatively described by equations of lattice models with well-coordinated equation parameters.

The possibility of describing isotherms of gas adsorption on flat carbon surfaces by means of lattice model equations and equations of the theory of micropore volume filling has been demonstrated. The obtained results have been compared to data on the adsorption in micropores of active carbon.

Nickel(II), manganese(III), and magnesium(II) porphyrazines are synthesized and investigated as active electrode components of polyvinyl chloride plasticized membranes for ion-selective electrodes (ISE). The potentiometric response of membranes based on metalloporphyrazines doped with 1,3-dihexadecylimidazolium chloride (ionic additive) relative to benzylpenicillin and iodide anions is studied. It is found that the introduction of the ionic additive significantly improves the electrochemical characteristics of the ISE: the slope of the electrode function in benzylpenicillinate solutions is (58 ± 7) mV/dec and cmin = 7 × 10−5 M, and in iodide solutions, (55 ± 2) mV/dec and cmin = 6 × 10−6 M. It is shown that the ISE based on manganese(III) porphyrazine with an ionic additive can be used to determine iodide in Iodinol preparation.