CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam
AbstractThe expansion product from the sulfuric acid dehydration of para-nitroaniline has been characterized and studied for CO2 adsorption. The X-ray photoelectron spectroscopy (XPS) characterization of the foam indicates that both N and S contents (15 and 9 wt%, respectively) are comparable to those separately reported for nitrogen- or sulfur-containing porous carbon materials. The analysis of the XPS signals of C1s, O1s, N1s, and S2p reveals the presence of a large number of functional groups and chemical species. The CO2 adsorption capacity of the foam is 7.9 wt% (1.79 mmol/g) at 24.5 °C and 1 atm in 30 min, while the integral molar heat of adsorption is 113.6 kJ/mol, indicative of the fact that chemical reactions characteristic of amine sorbents are observed for this type of carbon foam. The kinetics of adsorption is of pseudo-first-order with an extrapolated activation energy of 18.3 kJ/mol comparable to that of amine-modified nanocarbons. The richness in functionalities of H2SO4-expanded foams represents a valuable and further pursuable approach to porous carbons alternative to KOH-derived activated carbons. View Full-Text
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Andreoli, E.; Barron, A.R. CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam. C 2016, 2, 25.
Andreoli E, Barron AR. CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam. C. 2016; 2(4):25.Chicago/Turabian Style
Andreoli, Enrico; Barron, Andrew R. 2016. "CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam." C 2, no. 4: 25.