Enhanced gas adsorption using an effective nanoadsorbent with high surface area based on waste jute as cellulose fiber

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 CO 2 , CH 4 , and H 2 S 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 m 2 /g), and WJ-D sample created the highest pore volume (1.47 cm 3 /g). Furthermore, WJ-D sample provided an excellent CO 2 , CH 4 , and H 2 S uptake at both 1 bar (CO 2 : 9.15, CH 4 : 4.2, and H 2 S: 19.08 mmol/g) and 35 bars (CO 2 : 26.18, CH 4 : 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. Graphical abstract