Study of methane and carbon dioxide adsorption capacity by synthetic nanoporous carbon based on pyrogallol-formaldehyde. (30th March 2017)

• Record Type: Journal Article
• Authors: Djeridi, W.; Ben Mansour, N.; Ouederni, A.; Llewellyn, P.L.; El Mir, L.
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 13(2017)
• Page Start: 8905
• Page End: 8913
• Publication Date: 2017-03-30
• Subjects: Nanoporous carbon -- Sol–gel method -- Methane adsorption -- Dioxide carbon adsorption -- Enthalpies; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.06.105
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Nanoporous carbons were synthesized at certain conditions by sol–gel method combined with furnace firing in inert atmosphere from pyrogallol-formaldehyde (PF) mixtures in water using perchloric acid as catalyst. Their morphology was studied experimentally to examine their adsorption capacity for greenhouse gases. The preparation conditions of the nanoporous carbons were explored by changing the pyrolysis temperature. The effect of this factor on determining the pore structures and the adsorption capacities were evaluated. The synthesized xerogels were characterized by X-ray diffraction, nitrogen adsorption–desorption isotherms, thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that surface areas and nitrogen adsorption capacity are dependent completely on the pyrolysis temperature. Equilibrium and enthalpies studies for the CO2 and CH4 adsorption on PF were measured at room temperature and up to 25 bar. The adsorption capacity on PF was highest for CO2 and then CH4 . The best sample shows maximal adsorption capacities as follows 5.50 mmol g −1 of CH4 and 7.62 mmol g −1 of CO2 at 25 bar and 30 °C. Graphical abstract: Highlights: Nanoporous carbons synthesized by sol–gel technique based on pyrogallol formaldehyde precursors. Carbon dioxide and methane storage isotherm at 30 °C and up to 25 bars has been measured. Pyrolysis temperature and texture effect on the gas adsorption capacity have been studied. The micropore volume is not proportional to the adsorbed amount of two gases. The enthalpy adsorption explains the difference of capacity adsorption of CO2 and CH4 for PF-1000.