Synthesis-structure-property relationship of nitrogen-doped porous covalent triazine frameworks for pre-combustion CO2 capture

Ahmad Mukhtar, Sami Ullah, Abrar Inayat, Sidra Saqib, Nurhayati Binti Mellon, Mohammed Ali Assiri, Abdullah G. Al-Sehemi, Muhammad Bilal Khan Niazi, Zaib Jahan, Mohamad Azmi Bustam and Muhammad Ibrahim

Energy, 2021, vol. 216, issue C

Abstract: In this work, high pressure selective CO2/CH4 adsorption over functionalized covalent triazine based frameworks (CTF-NH) have been reported at high-pressure (1–20 bar) and different temperatures. The findings revealed that the successive incorporation of amine functionalities to the CTF leads to the enhancement of CO2 and CH4 adsorption capacities by 94.99% and 3.69%, respectively. The CO2 and CH4 adsorption capacities decreased with rising temperatures. The selectivity of CO2/CH4 was improved from 2.745 to 5.145. The different adsorption isotherms showed good fitting agreement with the experimentally acquired data with a lower value (AARE and R2) approaching to 1. The isotherm analysis exhibited that the adsorption is heterogeneous and satisfactory under these conditions. Dubinin-Radushkevich (D-R) isotherm analysis showed that the physisorption is dominant, with adsorption energy of less than 20 kJ/mol. Finally, thermodynamic properties revealed that at lower temperatures, the adsorption phenomenon is satisfactory, physical in nature, and exhibiting less disorder and randomness.

Keywords: CO2 separation; Natural gas purification; Adsorption; Sustainable energy; Clean energy; Thermodynamics; And high-pressure adsorption (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:216:y:2021:i:c:s0360544220323379

DOI: 10.1016/j.energy.2020.119230

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