| Abstrakt: |
In this study, waste jute as a novel nanoadsorbent in order to provide a unique micro-mesoporous structure has been successfully synthesized and fabricated. We prepared the nanoadsorbent through a simple chemical activation procedure at the different C/KOH ratios (1:1, 1:2, 1:3, and 1:4) and regarding C/KOH ratios utilized named waste jute A, waste jute B, waste jute C, and waste jute D (WJ-A, WJ-B, WJ-C, WJ-D). To evaluate the physicochemical characterization of the nanoadsorbents, FESEM, elemental mapping, BET, CHNS, FTIR, and XRD analyses were investigated. The performance of synthesized nanoadsorbents for CO2, CH4, and H2S adsorption was evaluated at the pressure range of 1 to 35 bar and at the temperature of 25 °C. The empirical models were utilized in order to investigate the behavior of adsorbed gases. The selectivity and stability of gas adsorption were also investigated. The nanoadsorbents provided a large surface area (2584 m2/g), and WJ-D sample created the highest pore volume (1.47 cm3/g). Furthermore, WJ-D sample provided an excellent CO2, CH4, and H2S uptake at both 1 bar (CO2: 9.15, CH4: 4.2, and H2S: 19.08 mmol/g) and 35 bars (CO2: 26.18, CH4: 10.06). The results also demonstrated that the selectivity of WJ-B and WJ-D at the rate of 10:90 and 1 bar was 2.03 and 2.87, respectively. The elemental analysis showed that the synthesized nanoadsorbents (WJ-A, WJ-B, WJ-C, WJ-D) were rich enough in terms of functional groups, which contained 87.38, 89.88, 91.84, and 93.34 wt% C; 0.72, 1.34, 1.90, and 1.78 wt% H; and 0.36, 0.94, 1.20, 0.91 wt% N, respectively. The thermodynamic parameters were also calculated and the results confirmed a physisorption and multilayer for the nanoadsorbents used. The large surface area and the micropore structure created of the synthesized nanoadsorbents together with low cost and availability make them a superior adsorbent, and consequently its application for gas adsorption in a large scale could be mainly considered. [ABSTRACT FROM AUTHOR] |
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