A novel high surface area asphaltene-derived nanoporous nitrogen-doped carbon with a unique structure for CO2 adsorption
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1Chemical Engineering Department, Science and Research Branch, Islamic Azad University, Tehran, Iran
2Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran
31: Department of Science and Research branch, Islamic Azad University, Tehran, Iran
4Nanotechnology Research Center, Research Institute of Petroleum Industry,
Increasing energy demand by people all around the world leads to rise of the greenhouse gases (GHG). It is believed that CO2 is the most potent greenhouse gas and contributes to global warming more than other GHGs. This project reports on the synthesis and characterization of meso porous carbon nitride by KOH activation. The samples were used to study as adsorbents for CO2 capture, and the effect of different parameters, such as various HMTA/Carbon ratios (1:3,1:2,1:1), various KOH weight ratios, different heating temperature (600-800-900°C) and heating time (60-120 min), on surface characteristics and CO2 uptake capacity of as-synthesized activated carbon was investigated. The as-synthesized samples were carefully characterized by various techniques. It was found that by decreasing activation temperature, KOH/C ratio and increasing the time of reaction, micropores formed better which cause higher adsorption at 1 bar and also, increasing activation temperature, KOH/C ratio will help to form mesopores, which cause higher adsorption at higher pressures. The measured uptake capacity of 4.4mmol/g at 1 bar and 25 °C by H-NPC-2-600-120 was among the highest reported values in the literature data for cellulose-base activated carbons, and also CO2 uptake capacity of 13.8mmol/g at 10 bar and 25 °C was achieved by H-CNP2-900.