Anthracite coal-derived activated carbon as an effectiveness adsorbent for superior gas adsorption and CO2 / N2 and CO2 / CH4 selectivity: Experimental and DFT study. Issue 1 (February 2022)

• Record Type: Journal Article
• Authors: Hamyali, Hadi; Nosratinia, Ferial; Rashidi, Alimorad; Ardjmand, Mehdi
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 1(2022)
• Publication Date: 2022-02
• Subjects: Gas adsorption -- Adsorbent -- Anthracite -- Activated carbon -- CO2/N2 and CO2/CH4 selectivity; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.107007
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Here and in this research we synthesized and applied the anthracite coal derived activated carbon as an appropriate adsorbent for uptaking CO2, N2 and CH4 . With alteration of different parameters such as activation time, the temperature and KOH /anthracite mass ratio, we synthesized several adsorbents based on anthracite. The synthesized adsorbents created a huge surface area (up to 4012 m 2 /g) with total pore volume (up to 2.07 cm 3 /g) and pore diameter (up to 3.56 nm). According to the results Iranian anthracite based activated carbon (IACAC) adsorbents within the low and high pressure range (1–35 bar) and at the temperature of 25 °C enhanced CO2 uptake up to 10.51 mmol/g and 27.58 mmol/g, respectively, highlighting a highly functionality of adsorbent in uptaking CO2 . Our results also demonstrated that the synthesized adsorbents provided an enhanced CO2 and CH4 uptake within the high and low pressure range. The synthesized adsorbents provided a remarkable selectivity for CO2 /N2 (25.67) and CO2 /CH4 (10.17), suggesting a high performance and functionality of adsorbents in gas separating. The density functional theory (DFT) calculations was also evaluated and analyzed in order to understand the binding energetic and adsorption mechanism. These findings demonstrated that the anthracite coal derived activated carbon possessing a huge surface area and excellent features could contribute to an enhanced gas uptake in large scale. Graphical Abstract: ga1 Highlights: The anthracite coal based activated carbon as an appropriate adsorbent for gas uptake. The adsorbents provided supreme surface area and pore volume up to 4012 m 2 /g and 2.07 cm 3 /g. The fabricated adsorbents provided an enhanced CO2, CH4 uptake at 1 bar and 25 °C. The synthesized adsorbents also demonstrated an excellent selectivity for CO2 /N2 and CO2 /CH4 at 25 °C and 0 °C.