Heats of combustion of oil shale, bitumen, and their mixtures

Abbasov, V. М.; Mamedov, F. F.; Ismailov, T. A.

doi:10.3103/s0361521908040113

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is important to note that the approach taken here although simple, provides useful information on the energy released and absorbed by chemical reactions in microscale. The overall exothermicity of bitumen was 38.7 MJ kg -1 , which agrees with bomb calorimeter values from literature [35]. As expected, the char oxidation results in the highest energy release during bitumen combustion, independent of the mechanism tested.…”

Section: Heat Of Pyrolysis and Oxidationsupporting

confidence: 90%

See 1 more Smart Citation

Thermal and oxidative decomposition of bitumen at the Microscale: Kinetic inverse modelling

Zanoni

Rein

Yermán

et al. 2020

Fuel

View full text Add to dashboard Cite

Section: Heat Of Pyrolysis and Oxidationsupporting

confidence: 90%

“…%)solid particles dispersed in maltene that are soluble in toluene but insoluble in n-heptane [6,15,16,[33][34][35][36][37][38] are largely responsible for the black colour of crude oils. Moreover, asphaltene is generally associated with a residue that precipitates and clogs pipelines [39].…”

Section: Fuelmentioning

confidence: 99%

Thermal and oxidative decomposition of bitumen at the Microscale: Kinetic inverse modelling

Zanoni

Rein

Yermán

et al. 2020

Fuel

View full text Add to dashboard Cite

“…Heating PFAS in an oven to 400–500 °C can achieve volatilization but cannot destroy the compounds, instead producing shorter-chain PFAS and volatile organic fluorine (VOF) byproducts (e.g., CF 4 and C 2 F 6 ). ,, Some PFAS defluorination can occur at 700 °C; however, 900–1100 °C is likely necessary for a high degree of PFAS destruction and to minimize production of undesired byproducts. ,,, High-temperature incineration and desorption plus thermal oxidation are therefore options for PFAS destruction. However, such facilities are expensive and energy-intensive to operate due to the need for continual input of supplementary fuel such as diesel. , GAC destruction is particularly problematic for incinerators, since, although it is energy-dense (higher heating value of 31 MJ/kg, measured via bomb calorimetry), it does not gasify …”

Section: Introductionmentioning

confidence: 99%

“…8,13 GAC destruction is particularly problematic for incinerators, since, although it is energy-dense (higher heating value of 31 MJ/kg, measured via bomb calorimetry), it does not gasify. 20 Smoldering combustion is here proposed as a new thermal PFAS remediation technique. Smoldering is a flameless oxidation reaction that occurs on the surface of a solid or liquid fuel when penetrated by gaseous oxygen.…”

Section: Introductionmentioning

confidence: 99%

Remediation of PFAS-Contaminated Soil and Granular Activated Carbon by Smoldering Combustion

Duchesne

Brown

Patch

et al. 2020

Environ. Sci. Technol.

116

View full text Add to dashboard Cite

This study explored smoldering combustion for remediating polyfluoroalkyl substance (PFAS)-impacted granular activated carbon (GAC) and PFAS-contaminated soil. GAC, both fresh and PFAS-loaded, was employed as the supplemental fuel supporting smoldering in mixtures with sand (≈175 mg PFAS/kg GAC-sand), with PFAS-spiked, laboratory-constructed soil (≈4 mg PFAS/kg soil), and with a PFAS-impacted field soil (≈0.2 mg PFAS/kg soil). The fate of PFAS and fluorine was quantified with soil and emission analyses, including targeted PFAS and suspect screening as well as hydrogen fluoride and total fluorine. Results demonstrated that exceeding 35 g GAC/kg soil resulted in self-sustained smoldering with temperatures exceeding 900 °C. Post-treatment PFAS concentrations of the treated soil were near (2 experiments) or below (7 experiments) detection limits (0.0004 mg/kg). Further, 44% of the initial PFAS on GAC underwent full destruction, compared to 16% of the PFAS on soil. Less than 1% of the initial PFAS contamination on GAC or soil was emitted as PFAS in the quantifiable analytical suite. Results suggest that the rest were emitted as altered, shorter-chain PFAS and volatile fluorinated compounds, which were scrubbed effectively with GAC. Total organic fluorine analysis proved useful for PFAS-loaded GAC in sand; however, analyzing soils suffered from interference from non-PFAS. Overall, this study demonstrated that smoldering has significant potential as an effective remediation technique for PFAS-impacted soils and PFAS-laden GAC.

show abstract

“…Previous studies have shown that incompleteness of combustion results in ΔHc being lower than that of complete combustion [22,36]. However, it is not physically possible for ΔHc to exceed that of complete combustion as measured by bomb calorimeter (e.g., for bitumen ΔHc=40.95 MJ kg -1 [40]). Thus, ΔHc in this context must be understood as a fitting parameter that modifies the energy balance in appropriate ways to reproduce weakly self-sustaining smouldering experiments.…”

Section: 3discussion On the Role Of δHcmentioning

confidence: 97%

Experimental and numerical investigation of weak, self-sustained conditions in engineered smouldering combustion

Zanoni

Torero

Gerhard

2020

Combustion and Flame

View full text Add to dashboard Cite

Engineered smouldering applications require self-sustaining conditions where the fuel is consumed without any addition of energy beyond ignition. In practical applications, it is preferred to create scenarios that are robust (i.e., far from extinction). In this work, smouldering column experiments were conducted, spanning conditions from robust self-sustaining through weak self-sustaining and to extinction by systematically lowering the applied air flux and the fuel concentration. A previously developed onedimensional numerical model, which was validated under robust smouldering conditions, was used to simulate the experiments. Experiments showed front deformation in the weak and extinction cases due to multi-dimensional effects. This deformation resulted in a redistribution of the air flow, altering the global energy balance at the centre-line. The model was found to be unable to accurately reproduce these weak and extinction cases with the original validation parameters. A sensitivity analysis revealed that treating the heat of combustion as a fitting parameter, and letting it vary beyond its realistic maximum, enabled the model to create a condition of sufficient energy at the centre-line and was the best way to quantitatively simulate the weak and extinction cases for this specific scenario. This reveals that the model assumptions, eff Effective g Gas 0 Initial oxid Oxidation pyr Pyrolysis rad Radiation rem Removed s Solid/bitumen sp Sphere

show abstract

Heats of combustion of oil shale, bitumen, and their mixtures

Cited by 5 publications

References 0 publications

Thermal and oxidative decomposition of bitumen at the Microscale: Kinetic inverse modelling

Thermal and oxidative decomposition of bitumen at the Microscale: Kinetic inverse modelling

Remediation of PFAS-Contaminated Soil and Granular Activated Carbon by Smoldering Combustion

Experimental and numerical investigation of weak, self-sustained conditions in engineered smouldering combustion

Contact Info

Product

Resources

About