One-step approach to Quaternary (B, N, P, S)-Doped hierarchical porous carbon derived from Quercus Brantii for highly selective and efficient CO2 Capture: A combined experimental and extensive DFT study

[Display omitted] •Quaternary-doped porous carbons were synthesized in one-step using Quercus Brantii.•Heteroatoms incorporated can be used as CO2-philic sites and pore-forming agent.•The high SBET of PAC (2227.4 m2 g−1) leads to excellent CO2 uptake (7.13 mmol g−1).•PAC exhibited excellent CO2 adso...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-02, Vol.453, p.139950, Article 139950
Hauptverfasser: Mohammady Maklavany, Davood, Rouzitalab, Zahra, Mohammad Amini, Ali, Askarieh, Mojtaba, Luigi Silvestrelli, Pier, Seif, Abdolvahab, Orooji, Yasin, Rashidi, Alimorad
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Sprache:eng
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Zusammenfassung:[Display omitted] •Quaternary-doped porous carbons were synthesized in one-step using Quercus Brantii.•Heteroatoms incorporated can be used as CO2-philic sites and pore-forming agent.•The high SBET of PAC (2227.4 m2 g−1) leads to excellent CO2 uptake (7.13 mmol g−1).•PAC exhibited excellent CO2 adsorption capacity, cyclability, and selectivity.•Adsorption mechanism of CO2 was clarified by experimental and DFT studies. Recently, the enhancement of atmospheric carbon dioxide (CO2) concentration has a negative impact on the environment and human health. Adsorption is well recognized as a promising technology to control CO2 emission in which the design of an optimum adsorbent is one of the most critical challenges. In this article, multi-heteroatoms doped porous carbons have been successfully derived from Quercus Brantii by one-step doping–activation to investigate the textural characteristics and heteroatoms doping effects on CO2 capture application. Based on the physicochemical properties of the adsorbents, which were characterized using varied techniques (FE-SEM, EDS, HR-TEM, XRD, FT-IR, XPS, BET, and BJH), the introduction of heteroatoms provides more active sites in carbon networks and develops the porous architecture of each activated carbon, resulting in diverse CO2 capture performances. The low content of phosphorus (P) incorporated in P-doped activated carbon (PAC) perfected the performance of CO2 capture to reach a high uptake (7.13 mmol g−1 at 1 bar and 20 °C) on a heterogeneous surface. Apart from the high equilibrium and dynamic CO2 uptake, these Quercus Brantii-based carbonaceous adsorbents present superior CO2 selectivity over N2, CH4, and H2, prominent cyclic regeneration capacity, high turnover frequency (TOF) and turnover number (TON) for commercial scale as well as fast kinetic adsorption. The density functional theory (DFT) method was performed to reveal the adsorption mechanisms as well as electronic properties of the systems.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2022.139950