Sorption of carbon dioxide, methane, and nitrogen on zeolite‐F: Equilibrium adsorption study

Abstract

Carbon dioxide is a major contributor in greenhouse gases. Unswerving increase of CO2 in atmosphere, due to growing industries and automobile field, is a wakeup call to the world as excess of CO2 will affect humans in many ways among which greenhouse effect dominated the most. In the present work potassium based zeolite‐F was synthesized by hydrothermal method as reported by International Zeolite Association. Synthesized zeolite‐F was characterized with powder X‐Ray diffraction analysis, FT‐IR spectroscopy, scanning electron microscopy, thermo gravimetric analysis and BET surface area measurement. The equilibrium adsorption capacities of pure gases CO2, N2, and CH4 were measured at 273, 288, and 303 K up to 850 mmHg. Although zeolite‐F possesses low CO2 adsorption capacity (43.6cc/g) at 303 K, the selectivity towards N2 and CH4 reflects its potential as an efficient CO2 adsorbent. The selectivity of CO2 over N2 in zeolite‐F was 38 at 303 K and 850 mmHg pressure, whereas selectivity for CO2 over CH4 was 30. Thus, zeolite‐F has shown potential for selective CO2 adsorption from its gas mixture with N2 and CH4. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 850–856, 2017