Laboratory methods for the analysis of key indicators of the purity of amino solutions

Abstract

At present, for the purification of gases from sulfur compounds, amine solutions are mainly used, which become contaminated during operation, which entails a number of technological problems. We have chosen a list of key indicators characterizing the degree of contamination of solutions, which consists of the concentration of thermostable salts, the mass fraction of chlorine ions, the mass fraction of iron and nickel, and foaming solutions. The article presents a multiple description and essence of methods for determining the indicators of the degree of contamination of solutions. For testing, 10 regenerated MDEA and MEA solutions were selected. For each value obtained, the limit of the total error and the allowable interval of the value were calculated to determine the convergence and adequacy of the measurements. All values fall within the allowable interval, taking into account the characteristic error of MI, which indicates the reliability and expediency of using these methods. Keywords: methylethanolamine; methyldiethanolamine; thermostable salts; corrosion; electrical conductivity; foaming; cleaning; activated carbon; ion-exchange resin.