Sustainable functionalized metal-organic framework NH2-MIL-101(Al) for CO2 separation under cryogenic conditions

Muhammad Babar; Muhammad Mubashir; Ahmad Mukhtar; Sidra Saqib; Sami Ullah; Mohamad Azmi Bustam; Pau Loke Show

doi:10.1016/j.envpol.2021.116924

Sustainable functionalized metal-organic framework NH₂-MIL-101(Al) for CO₂ separation under cryogenic conditions

Environ Pollut. 2021 Jun 15:279:116924. doi: 10.1016/j.envpol.2021.116924. Epub 2021 Mar 10.

Authors

Muhammad Babar¹, Muhammad Mubashir², Ahmad Mukhtar³, Sidra Saqib⁴, Sami Ullah⁵, Mohamad Azmi Bustam¹, Pau Loke Show⁶

Affiliations

¹ Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia.
² Department of Petroleum Engineering, Faculty of Computing, Engineering & Technology, School of Engineering, Asia Pacific University of Technology, and Innovation, 57000, Kuala Lumpur, Malaysia.
³ Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia; Department of Chemical Engineering, NFC Institute of Engineering and Fertilizer Research, Faisalabad, Punjab, 38000, Pakistan.
⁴ Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defense Road, Punjab, 54000, Pakistan.
⁵ Department of Chemistry, College of Science, King Khalid University, Abha, 61413, Saudi Arabia.
⁶ Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia. Electronic address: pauloke.show@nottingham.edu.my.

PMID: 33751951
DOI: 10.1016/j.envpol.2021.116924

Abstract

In this study, a sustainable NH₂-MIL-101(Al) is synthesized and subjected to characterization for cryogenic CO₂ adsorption, isotherms, and thermodynamic study. The morphology revealed a highly porous surface. The XRD showed that NH₂-MIL-101(Al) was crystalline. The NH₂-MIL-101(Al) decomposes at a temperature (>500 °C) indicating excellent thermal stability. The BET investigation revealed the specific surface area of 2530 m²/g and the pore volume of 1.32 cm³/g. The CO₂ adsorption capacity was found to be 9.55 wt% to 2.31 wt% within the investigated temperature range. The isotherms revealed the availability of adsorption sites with favorable adsorption at lower temperatures indicating the thermodynamically controlled process. The thermodynamics showed that the process is non-spontaneous, endothermic, with fewer disorders, chemisorption. Finally, the breakthrough time of NH₂-MIL-101(Al) is 31.25% more than spherical glass beads. The CO₂ captured by the particles was 2.29 kg m^-3. The CO₂ capture using glass packing was 121% less than NH₂-MIL-101(Al) under similar conditions of temperature and pressure.

Keywords: Adsorption; CO(2) capture; Cryogenic; Isotherms; Metal organic framework; Thermodynamics.

MeSH terms

Adsorption
Carbon Dioxide
Metal-Organic Frameworks*
Thermodynamics

Substances

MIL-101
Metal-Organic Frameworks
Carbon Dioxide