The Absorption Behavior of So2 By Amine Alkyl Organosilicon: Experimental Analysis and Numerical Simulation

Abstract

N-Benzyl-N-methyl-1-(methyl diphenyl silyl) methanamine (MPSA) with high thermal stability was synthesized for the absorption of SO2 in the present work. The absorption capacity was measured at low partial pressures ranging from 0.002-0.016 bar and thermodynamic parameters, including enthalpy change (ΔH) and entropy change (ΔS) were calculated to analyze the absorption behavior. The desulphurization rates and absorption capacities at different temperatures and partial pressures were simulated based on thermodynamic parameters. An optimal absorption temperature T1 that maximizes the absorption capacity, and an optimal desorption temperature T2 that minimizes the desorption residual capacity and thermal desorption energy consumption were defined, and a function was proposed to calculate them. The absorption kinetic behavior was described by pseudo-first-order equation, and kinetic data at different temperatures and partial pressures were simulated based on a combination of kinetic and thermodynamic parameters. Ultimately, selectivity and cycles experimental showed MPSA has a good CO2 selectivity and thermal regeneration performance.

Keywords: SO2 absorption, desulfurization rate, optimal absorption conditions, thermodynamic, kinetics.