Journal du génie chimique et de la technologie des procédés
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Investigation on CO₂ Solubility in Aqueous Amine Solution of MDEA/PZ with SiO₂ Nanoparticles Additive as Novel Solvent

Hossein Shahraki, Jafar Sadeghi, Farhad Shahraki and Davod Mohebbi Kalhori

Conventional industrial processes for CO₂ capturing include gas absorption by solvent. The most common solvent consisting of an aqueous solution of methyl di-ethanol amine (MDEA) activated with Piperazine (PZ). This research however examines CO₂ solubility in absorption and desorption process using the above mentioned solvent that reinforced by nanoparticles additives at concentrations of 12, 25, 50, and 100 ppm, respectively. In this novel solvent Carbon dioxide solubility was studied at 40 and 120°C. These tests conducted at 0.1 to 26 atm partial pressure of CO₂ and Vapor–Liquid Equilibrium (VLE) data were obtained from laboratory setup. The results indicate an increase in CO₂ loading and changing on solubility equilibrium curve to more concentration of CO₂ in liquid phase for solvent containing nanoparticles. The solvent CO₂ loading was enhanced up to 37.5% by introducing 25 ppm of our novel nanoparticles.