Effect of ZnCl2 activation on CO2 adsorption of N-doped nanoporous carbons from polypyrrole

Effect of activating agents on the development of microporosity in polymeric-based carbon for CO2 adsorption

“…Temperature and ratio of chemical reagent to carbon were chosen to obtain the highest volume of micropores [16,[25][26][27]. KOH activation was performed by mixing 2 g of potassium hydroxide with 0.5 g of carbon, followed by thermal treatment in an alumina tube furnace at 700°C for 1 h under nitrogen flow (heating rate 10°C min À1 ).…”

“…In contrast to KOH, ZnCl 2 is rather used for activation of biomass and organics. For instance, Vargas et al [15] activated a lignocellulosic precursor with ZnCl 2 achieving CO 2 capacity of 2.7 mmol g À1 (0°C, 1 bar), while Meng and Park [16] activated polypyrrole achieving CO 2 uptake of 3.8 mmol g À1 at (25°C, 1 bar). An advantage of chemical activation from industrial viewpoint is lower temperature of the process, which implies lower energy cost, and higher yield of the product [17].…”

Porous carbon derived via KOH activation of a hypercrosslinked porous organic polymer for efficient CO2, CH4, H2 adsorptions and high CO2/N2 selectivity

“…Physical or chemical activation of carbonaceous materials with CO 2 , steam, ZnCl 2 , KOH etc. employed as activating agents to prepare porous carbons [16][17][18][19]. In addition to this, templating methods of using zeolites like ZSM-5 or carbide derived carbons are also employed to a large extent to obtain desired porous carbon materials with narrow pore distribution and high BET surface areas [20].…”

Solvothermal synthesis and enhanced CO 2 adsorption ability of mesoporous graphene oxide-ZnO nanocomposite

“…Ainara Group reported a potential adsorbent of CO 2 by using GO as support for layered double hydroxides, and the nanocomposite showed great enhanced adsorption amount [9], that is because the functional groups of GO exhibit excellent affinity on CO 2 . [10,11] Therefore, in order to enhance the adsorption ability on CO 2 , we synthesized the GO-ZnO nanocomposite. The strategy to synthesize GO-ZnO can be sorted into several methods: microwave-assisted synthesis, solvothermal method and template route, etc.…”