Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Preparation of eco-friendly adsorbent for enhancing CO2 adsorption capacity
AU - Hussin, F.
AU - Aroua, M.K.
AU - Yusoff, R.
AU - Szlachta, M.
PY - 2021/11/8
Y1 - 2021/11/8
N2 - The aim of this study was to investigate the potential of adsorbent derived from agricultural by-product-based activated carbon (AC) functionalized by deep eutectic solvents (DESs) for CO2 capturing application. Three types of DES, namely Tetrabutylammonium Bromide (TBAB), Methyltriphenylphosphonium Bromide (MTPB), and Triethlyene Glycol (TEG) were synthesized and functionalized with AC using the impregnation method. The characteristics of the prepared adsorbents were analyzed, including the freezing/melting point, viscosity, surface morphology, elemental composition, and BET surface area. Following the characterization, the CO2 breakthrough adsorption analysis was performed in a packed-bed reactor. The results revealed that the modified AC with the combination of TBAB and TEG showed the maximum CO2 adsorption capacity of 16.5 mg/g compared to other adsorbents mixtures. The maximum adsorption capacity was achieved at a breakthrough time, temperature, gas flow rate and CO2 concentration of 11.5 minutes, 25◦C, 200 mL/min, and 10%, respectively. Furthermore, the adsorption process was thermodynamically favorable and spontaneous under exothermic reaction as indicated by the negative values of both the Gibbs free energy (∆G°) and enthalpy (∆H°). The regeneration evaluation also demonstrated that the modified AC sample was recyclable and reusable for more than nine cycles.
AB - The aim of this study was to investigate the potential of adsorbent derived from agricultural by-product-based activated carbon (AC) functionalized by deep eutectic solvents (DESs) for CO2 capturing application. Three types of DES, namely Tetrabutylammonium Bromide (TBAB), Methyltriphenylphosphonium Bromide (MTPB), and Triethlyene Glycol (TEG) were synthesized and functionalized with AC using the impregnation method. The characteristics of the prepared adsorbents were analyzed, including the freezing/melting point, viscosity, surface morphology, elemental composition, and BET surface area. Following the characterization, the CO2 breakthrough adsorption analysis was performed in a packed-bed reactor. The results revealed that the modified AC with the combination of TBAB and TEG showed the maximum CO2 adsorption capacity of 16.5 mg/g compared to other adsorbents mixtures. The maximum adsorption capacity was achieved at a breakthrough time, temperature, gas flow rate and CO2 concentration of 11.5 minutes, 25◦C, 200 mL/min, and 10%, respectively. Furthermore, the adsorption process was thermodynamically favorable and spontaneous under exothermic reaction as indicated by the negative values of both the Gibbs free energy (∆G°) and enthalpy (∆H°). The regeneration evaluation also demonstrated that the modified AC sample was recyclable and reusable for more than nine cycles.
KW - Activated carbon
KW - co2 adsorption
KW - deep eutectic solvents
KW - green solvents
KW - regeneration efficiency
KW - Adsorption
KW - Agricultural wastes
KW - Carbon dioxide
KW - Flow of gases
KW - Free energy
KW - Gibbs free energy
KW - Morphology
KW - Packed beds
KW - Solvents
KW - Surface morphology
KW - Adsorption capacities
KW - Agricultural by-products
KW - Co2 adsorption
KW - Deep eutectic solvents
KW - Eco-friendly
KW - Functionalized
KW - Greener solvents
KW - Modified activated carbons
KW - Regeneration efficiency
KW - Tetrabutylammonium bromide
U2 - 10.1080/01496395.2021.1998122
DO - 10.1080/01496395.2021.1998122
M3 - Journal article
JO - Separation Science and Technology
JF - Separation Science and Technology
SN - 0149-6395
ER -