Next Article in Journal
Batteries: Recent Advances in Carbon Materials
Next Article in Special Issue
More Energy-Efficient CO2 Capture from IGCC GE Flue Gases
Previous Article in Journal
Recent Progress in Design of Biomass-Derived Hard Carbons for Sodium Ion Batteries
Previous Article in Special Issue
Thermochemistry of a Biomimetic and Rubisco-Inspired CO2 Capture System from Air
Article Menu

Export Article

Open AccessCommunication

CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam

Energy Safety Research Institute, Swansea University Bay Campus, Swansea SA1 8EN, UK
Department of Chemistry, Rice University, Houston, TX 77005, USA
Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, USA
Author to whom correspondence should be addressed.
Academic Editor: Craig E. Banks
Received: 25 November 2016 / Revised: 14 December 2016 / Accepted: 16 December 2016 / Published: 21 December 2016
(This article belongs to the Special Issue Materials and Processes for Carbon Dioxide Capture and Utilisation)
PDF [1065 KB, uploaded 21 December 2016]


The 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
Keywords: porous carbon; nitrogen; sulfur; CO2; nitroaniline; sulfuric acid porous carbon; nitrogen; sulfur; CO2; nitroaniline; sulfuric acid

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material


Share & Cite This Article

MDPI and ACS Style

Andreoli, E.; Barron, A.R. CO2 Adsorption by para-Nitroaniline Sulfuric Acid-Derived Porous Carbon Foam. C 2016, 2, 25.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics



[Return to top]
C EISSN 2311-5629 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top