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Comparison of linear and non-linear method for modeling CO2 adsorption over impregnated zeolite (MgO)-NaY
Last modified: 2018-08-01
Abstract
ABSTRACT
The greenhouse gas emissions in the environment are recently the major problem all over the world. Carbon dioxide (CO2) is the most important greenhouse gas (GHG) emitted in the atmosphere [1]. Various CO2 capture technologies have been proposed to retain this gas, in particular by adsorption. The zeolitic adsorbents prove to be more interesting for the selectivity, which they offer towards the CO2. In this work, we studied the adsorption of CO2 at 30°C (P = 0 to 1 bar) on impregnated NaY zeolite at different mass levels of MgO (2, 5, 10 and 15%). The experimental data was analyzed using the Sips isotherm equations by linear and non-linear method. The coefficient of determination (r2) and the sum of the squares of the errors were used to predict the best method. The determination coefficients obtained from non-linear method were higher than those obtained from linear one. Error values indicated that non-linear method is a better way to obtain the isotherm parameters describing the CO2 adsorption onto NaY impregnated zeolite.
The greenhouse gas emissions in the environment are recently the major problem all over the world. Carbon dioxide (CO2) is the most important greenhouse gas (GHG) emitted in the atmosphere [1]. Various CO2 capture technologies have been proposed to retain this gas, in particular by adsorption. The zeolitic adsorbents prove to be more interesting for the selectivity, which they offer towards the CO2. In this work, we studied the adsorption of CO2 at 30°C (P = 0 to 1 bar) on impregnated NaY zeolite at different mass levels of MgO (2, 5, 10 and 15%). The experimental data was analyzed using the Sips isotherm equations by linear and non-linear method. The coefficient of determination (r2) and the sum of the squares of the errors were used to predict the best method. The determination coefficients obtained from non-linear method were higher than those obtained from linear one. Error values indicated that non-linear method is a better way to obtain the isotherm parameters describing the CO2 adsorption onto NaY impregnated zeolite.