Statistical Analysis of the Effects of Aluminum Oxide (Al2O3) Nanoparticle, TBAC and APG on Storage Capacity of CO2 Hydrate Formation

Abstract

In this study, the effect of various concentrations of alkyl polyglycoside (APG), aluminum oxide nanoparticles (Al2O3), and tetra-n-butyl ammonium chloride (TBAC) on the storage capacity of CO2 hydrate formation are investigated. For this aim, a laboratory system is developed. The experiments are carried out in the pressure range of 25 to 35 bar and the temperature range of 275.15 K to 279.15 K. The Experimental results showed that by increasing the system pressure at constant temperature, the storage capacity increased by 48% in average. Decreasing the system temperature at constant pressure increased the storage capacity by 23% in average. Adding APG to the system at constant temperature and pressure increases the storage capacity by 75% in average, while adding nanoparticles of aluminum oxide increases the storage capacity by 5% and TBAC 38% in average. For statistical analysis of laboratory data, Design Expert software and Response Surface test design method and Quadratic model are employed and a mathematical relationship is developed with R2 = 0.9987 to estimate CO2 storage capacity in hydrates. The optimum amount of storage capacity equal to 137.476 has been reached at 34.558 bar, 276.085 K, 2.825 Wt% of TBAC, 956.733 ppm APG, 2.436 Wt % Al2O3.