TY - JOUR
T1 - Food wastes derived adsorbents for carbon dioxide and benzene gas sorption
AU - Opatokun, Suraj Adebayo
AU - Prabhu, Azhagapillai
AU - Al Shoaibi, Ahmed
AU - Srinivasakannan, C.
AU - Strezov, Vladimir
N1 - Funding Information:
The authors thank Macquarie University and The Petroleum Institute (Grant No. GRC - 11003 ) for the financial support. We appreciate the assistance of Dr. Niklas Hedin and Dr. Zoltan Bacsik (Material & Environmental Chemistry dept. of Stockholm university, Sweden) on the CO 2 adsorption. Dr. Alfonso Garcia-Bennett (Macquarie University) and Dr. Bamidele Yusuf Onundy insights and unreserved supports are appreciated. Vishnu Vijayan Pillai assistance on the elemental analysis is highly appreciated. The laboratory support provided by A.V. Ramani and Gayathri Lakshmanan at the PI are equally recognized.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Food wastes are produced worldwide in large quantities that could have potential to produce higher value products, including industrial adsorbents. The present work attempts valorization of food waste by CO2 activation and functionalization through nitric acid and melamine treatment. The prepared porous materials were subjected to gas phase adsorption of CO2 and benzene gases. The resultant highly porous carbon materials with surface area range from 797 to 1025 m2/g were synthesized showing uptake capacities of 4.41, 4.07, 4.18 and 4.36 mmol/g of CO2 and 345, 305, 242.5 and 380.7 mg/g of C6H6 respectively for PyF515, PyF520, PyF715 and PyF720 in the absence of doped carbon matrix. Differential thermogravimetric (DTG) analysis showed the thermostability of the precursors to validate selected initial pyrolysis temperatures (500 and 700 °C). C6H6 sorption lies mainly in the physisorption region for all adsorbents ensuring re-generation potential. PyF720 and PyF520 recorded the highest isosteric enthalpy of 64.4 kJ/mol and 48.7 kJ/mol respectively, despite the low degree of coverage of the latter. Thus, PyF515 and PyF720 demonstrated the potential for use as sustainable and cost effective adsorbents for benzene gas containment suitable for swing adsorption system.
AB - Food wastes are produced worldwide in large quantities that could have potential to produce higher value products, including industrial adsorbents. The present work attempts valorization of food waste by CO2 activation and functionalization through nitric acid and melamine treatment. The prepared porous materials were subjected to gas phase adsorption of CO2 and benzene gases. The resultant highly porous carbon materials with surface area range from 797 to 1025 m2/g were synthesized showing uptake capacities of 4.41, 4.07, 4.18 and 4.36 mmol/g of CO2 and 345, 305, 242.5 and 380.7 mg/g of C6H6 respectively for PyF515, PyF520, PyF715 and PyF720 in the absence of doped carbon matrix. Differential thermogravimetric (DTG) analysis showed the thermostability of the precursors to validate selected initial pyrolysis temperatures (500 and 700 °C). C6H6 sorption lies mainly in the physisorption region for all adsorbents ensuring re-generation potential. PyF720 and PyF520 recorded the highest isosteric enthalpy of 64.4 kJ/mol and 48.7 kJ/mol respectively, despite the low degree of coverage of the latter. Thus, PyF515 and PyF720 demonstrated the potential for use as sustainable and cost effective adsorbents for benzene gas containment suitable for swing adsorption system.
KW - Adsorption
KW - Isosteric enthalpy and thermostability
KW - Isotherm
UR - http://www.scopus.com/inward/record.url?scp=84994029386&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2016.10.083
DO - 10.1016/j.chemosphere.2016.10.083
M3 - Article
C2 - 27810531
AN - SCOPUS:84994029386
SN - 0045-6535
VL - 168
SP - 326
EP - 332
JO - Chemosphere
JF - Chemosphere
ER -
