Adsorption and separation of CO₂/N₂ and CO₂/CH₄ by 13X zeolite

Abstract

Accumulation of greenhouse gases in the atmosphere is responsible for increased global warming of our planet. The increasing concentration of carbon dioxide mainly from flue gas, automobile and landfill gas (LFG) emissions are major contributors to this problem. In this work, CO2, CH4 and N2 adsorption was studied on Ceca 13X zeolite by determining pure and binary mixture isotherms using a constant volume method and a concentration pulse chromatographic technique at 40 and 100°C. The experimental data were then compared to the predicted binary behaviour by extended Langmuir model. Results showed that the extended Langmuir theoretical adsorption model can only be applied as an approximation to predict the experimental binary behaviour for the systems studied. Equilibrium phase diagrams were obtained from the experimental binary isotherms. For these systems, the integral thermodynamic consistency tests were also conducted. It was found that Ceca 13X exhibits large CO2/CH4 and CO2/N2 selectivity and could find application in landfill gas purification, CO2 removal from natural gas and CO2 removal from ambient air or flue gas streams. © 2011 Canadian Society for Chemical Engineering

Zeolitization of Sewage Sludge Ash With a Fusion Method

“…Their crystal structure contains numerous pores and cavities of different sizes giving them a unique ion-exchange, sorption and catalytic properties (Wdowin et al 2014). Because of these properties, zeolites have found applications in many areas such as environmental engineering (Mulgundmath et al 2012), construction industry (de Gennaro et al 2004), agriculture (Polat et al 2004) and refinery industries (Zhu et al 2013). …”

Synthesis of diethyl carbonate from ethanol through different routes: A thermodynamic and comparative analysis

“…[5,6] DEC synthesis also serves the purpose of sequestration of CO 2 on which many efforts have been already reported. [7][8][9][10][11][12][13][14][15] A comparison on essential properties of all three compounds along with diesel is shown in Table 1.…”

“…These include ethanolysis of urea (Equation (1)), carbonylation of ethanol using CO 2 (Equation (2)), trans-esterification of ethanol with ethylene carbonate (EC) (Equation (3)), and DMC (Equation (4)). [11][12][13][14][15] All these methods are being researched by different researchers. The present manuscript's authors have comprehensively reviewed all these methods.…”

Storage and separation of CO2 and CH4 in boron imidazolate frameworks: a theoretical study from Monte Carlo simulation

“…Interactions beyond 13Å were neglected. Each simulation point consisted of 5×10 6 MonteCarlo steps to reach equilibrium followed by an extra 5×10 6 steps to take the statistical average.…”

“…Among the potential adsorbent candidates (i.e. zeolites, activated carbon and so on) [5,6], metal organic frameworks (MOFs) have emerged as a front-runner. MOFs are ultra-porous crystalline materials that are able to trap and store voluminous amounts of gas molecules (i.e.…”