Ethylene absorption in N-methyl-2-pyrrolidone/silver nano-solvent: Thermodynamics and kinetics study

The effect of presence of silver nanoparticles in pure N-methyl-2-pyrrolidone (NMP) solvent for ethylene gas absorption in an experimental pressure decaying setup has been investigated. All experiments were performed at temperatures of 278.15 K, 298.15 K and 328.15 K and different pressures (up to ethylene dew point) as well as different concentrations of silver nanoparticles (0.05 g.L-1 and 0.1 g.L-1). The kinetic data of absorption, Henry's lawconstants, and heat of absorption were calculated. Comparison of the pure solvent and the nanofluids absorption results revealed that the presence of small amounts of nanoparticles could improve the absorption performance between 1.5% - 18%. Finally, the effect of temperature, pressure, and nanoparticle concentration on the equilibrium results were investigated. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.