The oxidation of heavy oil: Thermogravimetric analysis and non-isothermal kinetics using the distributed activation energy model

Cheng, Fan; Zan, Cheng; Zhang, Qiang; Ma, Dawei; Chu, Yue; Jiang, Hang; Shi, Lin; Wei, Fei

doi:10.1016/j.fuproc.2013.10.020

Cited by 59 publications

(30 citation statements)

References 26 publications

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“…The plateau region between the two demonstrated an outstanding increase of activation energies from LTO to HTO reactions. 33 Benefited from the devolatilization of heavy oil before experiments, detailed analysis on the LTO performances was obtained. First, the value of significant mass loss (15 wt %) observed at the end of LTO did not vary with oxygen partial pressure (Figure 2(a)).…”

Section: Resultsmentioning

confidence: 99%

“…The kinetic parameters were calculated by a nonisothermal method based on the assumption of distributed activation energy published in our previous publication. 33 Assuming first-order decomposition kinetics in consideration of the excess oxygen in the system, the relationship between the weight of residue and the LTO reaction rate was described by an Arrhenius expression (eq 3) as a function of temperature…”

Section: Low-temperature Oxidation Reaction Modelmentioning

confidence: 99%

“…25 To obtain a glance into the kinetic properties of LTO reactions with the avoidance of challenging modeling task, the kinetic parameters have been determined via thermogravimetric analysis 26−30 by the Arrhenius method, 31,32 Coats-Redfern (C-R) approximation, 18 and the distributed activation energy model (DAEM). 33 The apparent activation energy was reported to be ca. 100 kJ mol −1 , which was much lower than that of high-temperature oxidation (HTO).…”

Section: Introductionmentioning

confidence: 99%

“…100 kJ mol −1 , which was much lower than that of high-temperature oxidation (HTO). 33 Detailed kinetic models were also proposed. Ren et al 17 performed small batch experiments to explore the heating effect of LTO reactions and proposed a two-step lumping model (an exothermic oxidation process consuming O 2 and an endothermic decarboxylation process with the production of CO 2 ) to explain the temperature rise and CO 2 production during the LTO process.…”

Section: Introductionmentioning

confidence: 99%

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Air Injection for Enhanced Oil Recovery: In Situ Monitoring the Low-Temperature Oxidation of Oil through Thermogravimetry/Differential Scanning Calorimetry and Pressure Differential Scanning Calorimetry

Cheng¹,

Zan

Zhang³

et al. 2015

Ind. Eng. Chem. Res.

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Low-temperature oxidation (LTO) of oil plays an important role in air-injection based oil recovery processes. Systematic investigations on the regularities of LTO reactions, especially those decoupled with the influences of mass transfer, were highly expected to improve field application and even to develop new strategies for heavy oil recovery. In this contribution, both thermogravimetry/differential scanning calorimeter and pressure differential scanning calorimeter were employed as microreactors to in situ monitoring the heat release and mass loss performances of the LTO process under different oxygen partial pressures. The total amount of heat resulted from LTO reactions of oil was observed in a linear relationship with oxygen partial pressure. A one-step reaction model was proposed to simulate the low-temperature mass loss behavior. The kinetic parameters were calculated based on the Arrhenius expression and the assumption of distributed activation energy. These results indicated the feasibility of in situ generated heat during low-temperature oxidation by the promotion of oxygen partial pressure and the contact between oil and oxygen with little loss of deposited oil.

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Section: Resultsmentioning

confidence: 99%

Section: Low-temperature Oxidation Reaction Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Air Injection for Enhanced Oil Recovery: In Situ Monitoring the Low-Temperature Oxidation of Oil through Thermogravimetry/Differential Scanning Calorimetry and Pressure Differential Scanning Calorimetry

Cheng¹,

Zan

Zhang³

et al. 2015

Ind. Eng. Chem. Res.

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“…The TGA curves for the fuel oils show that thermal decomposition consists of two major parts, initial pyrolysis together with loss of alkanes/alkenes and char forming reactions [15,16,23]. In these experiments air is then injected and it is followed by char burn-out.…”

Section: Thermal Decomposition Reactions Of Petroleum Asphaltenesmentioning

confidence: 99%