Distinguishing between overlapping low temperature and high temperature oxidation data obtained from a pressurised flow reactor system using consolidated core material

Al-Saffar, H. B.; Price, Dennis; Soufi, A.; Hughes, R.

doi:10.1016/s0016-2361(99)00210-0

Cited by 25 publications

(20 citation statements)

References 5 publications

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“…As indicated by the plots, the velocity of the front increased from 3.21 mm min À1 at the beginning of the experiment to 4.84 mm min À1 by the end. Al-Saffara et al [27] found a similar trend. Torero and Fernandez-Pello [4] also reports this acceleration during forward smolder of polyurethane foam in a forced air flow.…”

Section: Calibration Of the Combustion Cell Using A Model Medium: Chamentioning

confidence: 65%

Co-current combustion of oil shale – Part 2: Structure of the combustion front

Martins

Salvador

Thovert

et al. 2010

Fuel

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Timahdit oil shale was used as a porous medium to characterize the structure of a combustion front propagating with co-current downward air supply. A new 1D experimental device was first calibrated using a model porous medium. With the model porous medium, the front propagates as a plane and horizontal surface while using oil shale the front propagates as an inclined curved surface. The peak temperature was 1100 °C; despite the relatively large diameter of the cell (91 mm) and the good thermal insulation, the heat losses were estimated at 42% of the heat released by the combustion. The thickness of the front was characterized using a new gas micro-sampling system: the char oxidation and the carbonate decarbonation zones are approximately 10 and 15 mm thick, respectively. The oil formed during the pyrolysis is adsorbed in the porous medium in the course of the experiment, and expulsed from the cell by the end.

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Section: Calibration Of the Combustion Cell Using A Model Medium: Chamentioning

confidence: 65%

Co-current combustion of oil shale – Part 2: Structure of the combustion front

Martins

Salvador

Thovert

et al. 2010

Fuel

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“…Calculations of the activation energy (E) for both the LTO and HTO reactions were made during the course of this work. These calculations were based on decoupling the total oxygen consumption curve into different regions by working from the high-temperature end of the data and isolating one reaction regime at a time . The calculated kinetic data together with different parameters are shown in Table .…”

Section: Reaction Studies Of Crude Oil/sub-oil Componentmentioning

confidence: 99%

Oxidation Reactions of a Light Crude Oil and Its SARA Fractions in Consolidated Cores

et al. 2000

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Preliminary investigations have been made into the oxidation behavior of a North Sea light crude oil and its individual SARA fractions (saturates, aromatics, resins, and asphaltenes) in the presence of consolidated cores. These investigations were made in an attempt to determine the following: (1) the feasibility of air injection into deep light oil reservoirs, (2) the extent of any interactions between the fractions in a whole oil sample by comparing the behavior of pure fractions with the behavior of mixtures of these fractions in the crude oil. A DISC reactor (an oxidation cell) has been used to study the various oxidation reactions and kinetics of a light oil under high pressure and a constant heating rate, by following the concentrations of the gases evolved (CO 2 , CO) and consumed (O 2 ). Such an investigation allows a quantitative study of the temperature intervals at which evaporation, oxidation, and combustion effects operate for each fraction. The data from these experiments may be used to assist the development of a comprehensive simulator for thermal oil recovery. One aim of the overall work is to replace the conventional two pseudo component representation of crude oil (heavy and light) by a SARA representation with its accompanying interaction and interconversion reactions together with the conventional oxidation reactions. This approach should provide a more realistic representation of the oil oxidation process.

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“…The oxidation kinetics of North Sea light crude oils using a flow reactor operated at high pressure was also investigated. In this study, they found the difference between the LTO and HTO reaction regimes and determined the boundary between them [5]. The effect of steam on LTO reactions modified the destructive effect of low-temperature oxidation.…”

Section: Introductionmentioning

confidence: 91%

“…The H/C ratio was calculated from the analysis of the produced gases for LTO reaction as the function of time. These calculations were based on the assumption that all the oxygen not observed in the exit gas had reacted to form water [5]. The apparent H/C ratio is defined as:…”

Section: Low-temperature Oxidation (Lto) Of Oilmentioning

confidence: 99%