Geometric effects on mass transfer during thermogravimetric analysis: Application to reactivity of diesel soot

Gilot, P.; Brillard, Alain; Stanmore, B. R.

doi:10.1016/0010-2180(95)00049-c

Cited by 30 publications

(24 citation statements)

References 5 publications

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“…Experiments done in a TGA may be affected [10] by mass transfer limitations, temperature gradients and a lack of intimate contact between gas and solid. The carbonaceous particles used in this study were extremely small (<1 lm) so they would soon elutriate from a bed of sand fluidised by gas.…”

Section: Introductionmentioning

confidence: 99%

The reactions of NO with diesel soot, fullerene, carbon nanotubes and activated carbons doped with transition metals

Tighe

Dennis

Hayhurst

et al. 2009

Proceedings of the Combustion Institute

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Section: Introductionmentioning

confidence: 99%

The reactions of NO with diesel soot, fullerene, carbon nanotubes and activated carbons doped with transition metals

Tighe

Dennis

Hayhurst

et al. 2009

Proceedings of the Combustion Institute

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“…Thus, TGA is also often used to investigate CB oxidation and to screen catalysts for DPF regeneration [7] . The mass transfer limitations play an important role in the reaction process in the thermogravimetric apparatus [8][9][10][11][12][13][14] . Salvador et al [9] studied the oxidation of 22 high-sulphur petroleum cokes with TGA.…”

Section: Introductionmentioning

confidence: 99%

Oxidation behavior of a kind of carbon black

Tang

Song

et al. 2009

Sci. China Ser. E-Technol. Sci.

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The DTG curves of a kind of carbon black during TPO tests were found to have multiple peaks with an unusual sharp peak after the main peak. TPO tests with different sample loads, oxygen fractions and heating rates were carried out to study the influence of the experimental parameters on the sharp peak. The results show that the sharp peak is not caused by heat and mass transfer limitations, but by the intrinsic oxidation kinetics of the carbon black. The evolution of the specific surface area during the intrinsic kinetic controlled oxidation process was then analyzed using isothermal oxidation at low temperatures which showed that the sharp peak is caused by the increase of the specific surface area. The pore structure changes greatly influence the oxidation process when the reaction is controlled by the intrinsic kinetics. When there were no heat and mass transfer limitations, the different oxidation processes result in the same specific surface area evolution. thermal analysis, carbon black, multiple peaks, specific surface area

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“…These experimental approaches involve TGA [1,2], flow reactors [3], bed reactors [4] etc. The inherent experimental difficulties involve the control of soot temperature and the avoidance of high exothermal peaks due to the soot combustion, mass and heat transfer limitations that can be rate -controlling etc.…”

Section: Introductionmentioning

confidence: 99%

Measurements of diesel soot oxidation kinetics in an isothermal flow reactor–catalytic effects using Pt based coatings

et al. 2007

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Despite the significant progress in soot oxidation studies, there is still high uncertainty regarding the rate expressions to model the reactions in diesel particulate filters (DPF). This uncertainty arises from inherent difficulties in sampling and measuring the reaction rate in a realistic way, as well as different properties of the examined soot. In this context, the scope of this study is the development of a novel experimental set-up capable of overcoming existing experimental difficulties. The developed set-up allows for real diesel soot oxidation studies in an isothermal flow reactor. The reaction of soot with oxygen and NO 2 is studied with synthetic gas and with real diesel exhaust and the reaction kinetics are derived for both bare and Pt-based catalyzed substrates by combining experimental and model results.

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Geometric effects on mass transfer during thermogravimetric analysis: Application to reactivity of diesel soot

Cited by 30 publications

References 5 publications

The reactions of NO with diesel soot, fullerene, carbon nanotubes and activated carbons doped with transition metals

The reactions of NO with diesel soot, fullerene, carbon nanotubes and activated carbons doped with transition metals

Oxidation behavior of a kind of carbon black

Measurements of diesel soot oxidation kinetics in an isothermal flow reactor–catalytic effects using Pt based coatings

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