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 m²/g (in pristine CNT) to 127 m²/g (in FCNT) and 122 m²/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.

加拿大拥有世界第三大油砂储量，其结果是，它通过石油蒸馏产生了大量的轻瓦斯油和重瓦斯油。随着能源需求的不断增长，从生物质和石化残渣中探索替代燃料资源变得至关重要。这项研究探索了通过优化工艺条件（例如温度（375-675°C），进料浓度（20-35 wt％）和反应时间）使超临界水气化将轻质和重质瓦斯油转化为富氢合成气的潜力。 （30-75分钟）。合成了镍负载的功能化碳纳米管（10％Ni / FCNT），用于催化超临界水气化。碳纳米管的功能化导致其表面积从108 m增加² / g（在原始CNT中）至127 m ² / g（在FCNT中）和122 m ²/ g（在10％Ni / FCNT中）。通过X射线衍射（XDR）和扫描电子显微镜-能量色散光谱（SEM-EDS）证实了催化镍颗粒在碳纳米管上的浸渍。两种瓦斯油的傅立叶变换红外（FTIR）光谱显示，除了其他几种芳族化合物外，还存在脂肪族化合物，烷基芳基醚和含硫化合物。在最佳工艺条件下（即675°C和75分钟，进料浓度为20 wt％），轻质粗柴油显示出比重粗柴油（2.79 mol / kg）更高的氢产率，为3.32 mol / kg。但是，使用10％Ni / FCNT可以提高从轻质气体获得的产物气的氢气产率（4.46 mol / kg），总气体产率（9.22 mol / kg），氢气选择性（94％）和较低的发热量（1685 MJ / kg）油与重瓦斯油相反。