Prediction of Three Component Gas Adsorption With Iast and Langmuir

Abstract

-Purification of natural gas is important to avoid pipe corrosion and improve its specific heat. This operation is mainly focused on hydrogen sulfide and carbon dioxide removal from methane, and adsorption is one of the proposed techniques. In this work, experimental adsorption isotherms for CH 4 , CO 2 or H 2 S, in NaY zeolite, at 30°C were determined and the Ideal adsorption solution theory (IAST) and Langmuir adsorption isotherm were used to predict the adsorption behavior of the gas mixture composed by CH 4 + CO 2 + H 2 S, at 1, 20 or 50 bar. According to Langmuir equation, the maximum adsorbed capacity was approximately 3.77, 7.06, and 7.02 mol/kg, for CH 4 , CO 2 , and H 2 S, respectively. The calculated values of distribution coefficient (K) and selectivity (S) indicate zeolite adsorbs more H 2 S than CO 2 . Also, K values are increased with CH 4 content, although S values are greater for high H 2 S concentration.

Evaluation of the Influence of Operating Parameters in the Modeling and Simulation of Sour Gas Stream Desulfurization by Adsorption

“…Gas desulfurization can be performed by (a) extraction with an amine solution, (b) catalytic hydrodesulfurization at high temperatures and pressures, (c) catalytic oxidation/adsorption with metal oxides, (d) adsorption in solid adsorbents under pressure and moderate temperature conditions, and (e) membranes. ,, Among the adsorbents, the use of zeolites, − activated carbon, − metal oxides, ,, and silica stands out. , …”