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Title: Catalytic gasification of light and heavy gas oils in supercritical water
Authors: Rana R.
Nanda S.
Reddy, Sivamohan N.
Dalai A.K.
Kozinski J.A.
Gökalp I.
Published in: Journal of the Energy Institute
Abstract: Canada has the third-largest oil sand reserves in the world as a result of which, it generates considerable amounts of light gas oil and heavy gas oil through petroleum distillation. With the escalating energy demands, it has become essential to explore alternative fuel resources from biomass and petrochemical residues. This study explores the potential of supercritical water gasification to transform light and heavy gas oils to hydrogen-rich syngas through the optimization of process conditions such as temperature (375–675 °C), feed concentration (20–35 wt%) and reaction time (30–75 min). Nickel-supported functionalized carbon nanotubes (10%Ni/FCNT) were synthesized for application in catalytic supercritical water gasification. The functionalization of carbon nanotubes resulted in an increase in their surface area from 108 m /g (in pristine CNT) to 127 m /g (in FCNT) and 122 m /g (in 10%Ni/FCNT). The impregnation of catalytic nickel particles onto carbon nanotubes was confirmed through X-ray diffraction (XDR) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). Fourier-transform infrared (FTIR) spectroscopy of both gas oils revealed the presence of aliphatics, alkyl-aryl ethers and sulfur-containing compounds among several other aromatics. Light gas oil revealed higher hydrogen yields of 3.32 mol/kg compared to that of heavy gas oil (2.79 mol/kg) at optimal process conditions, i.e. 675 °C and 75 min, 20 wt% feed concentration. However, 10%Ni/FCNT enhanced hydrogen yields (4.46 mol/kg), total gas yield (9.22 mol/kg), hydrogen selectivity (94%) and lower heating value (1685 MJ/kg) of product gases obtained from light gas oil in contrast to heavy gas oil. This study indicates a tremendous potential of gas oils for hydrogen generation via hydrothermal gasification. 
Citation: Journal of the Energy Institute(2020), 93(5): 2025-2032
Issue Date: 2020
Publisher: Elsevier B.V.
Keywords: Catalyst
Heavy gas oil
Light gas oil
Supercritical water
ISSN: 17439671
Author Scopus IDs: 57194625622
Author Affiliations: Rana, R., Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
Nanda, S., Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
Reddy, S.N., Department of C
Funding Details: .Canada Research Chairs Natural Sciences and Engineering Research Council of Canada, NSERC.The authors would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC) and Canada Research Chairs program for funding this research.
Corresponding Author: Kozinski, J.A.; Department of Chemical Engineering, Canada; email:
Appears in Collections:Journal Publications [CH]

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