TY - JOUR ID - 37721 TI - Nitrogen doped porous carbon derived from nanofibrous polyaniline for CO2 adsorption JO - Journal of Water and Environmental Nanotechnology JA - JWENT LA - en SN - 2476-7204 AU - Khalili, Soodabeh AU - Jahanshahi, Mohsen AD - Department of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Av., Babol, Iran Y1 - 2019 PY - 2019 VL - 4 IS - 4 SP - 285 EP - 295 KW - nano Polyaniline KW - Nitrogen doping KW - Carbon dioxide Adsorption KW - Chemical activation DO - 10.22090/jwent.2019.04.003 N2 - The objective of this work is to develop a cost-effective carbonaceous CO2 adsorbent. N-doped porous carbon (NDC) with nano- pore size was synthesized by KOH activation of nano polyaniline (PANI). PANI synthesized in this work has thin nanofibrillar morphology with different lengths and diameters. The activation process was carried out at 800 °C with KOH/precursor ratio of 2. This adsorbent of carbon exhibits high CO2 adsorption capacity of 1.9 mmol/g at 25 °C under atmospheric pressure. The morphology of PNCs is investigated through different technical methods, such as scanning electron microscopy (SEM), N2 adsorption isotherm at 77 K and Fourier transform infrared spectroscopy (FTIR). The CO2 adsorption experiments were done at three different temperatures (298, 308, and 318 K) and pressures up to 10 bar, and correlated with the Langmuir, Freundlich, and Sips models. The Sips isotherm model presented the best fit to the experimental data. Small values of isosteric heat of adsorption were evaluated based on Clausius–Clapeyron equation showed the physical nature of adsorption mechanism. The high amount of CO2 capture by nano- pore size NDC renders it as a promising carrier for practical applications such as gas separation. UR - https://www.jwent.net/article_37721.html L1 - https://www.jwent.net/article_37721_a7f49c2cc52338a5f5de78f27c1f2cf7.pdf ER -