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Study of the clay effect on crude oil combustion by thermogravimetry and differential scanning calorimetry

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Abstract

Thermogravimetry (TG) and differential scanning calorimetry (DSC) were used to study the effect of sand, silica and kaolinite on crude oil combustion. Three distinct regions, namely distillation and two combustion/cracking regions were observed on all TG curves. Thermogravimetric curves were analyzed using an Arrhenius-type kinetic model and a ratio method to obtain kinetic parameters. Activation energy and reaction order were obtained from this analysis. The reaction order seemed to be insensitive to the presence of granular materials. However, a significant reduction of activation energy was caused by addition of kaolinite to the crude oil, indicating that the kaolinite had a catalytic and surface area effect on crude oil combustion/cracking reactions.

Zusammenfassung

Die Wirkung von Sand, SiO2 und Kaolinit auf die Verbrennung von Rohöl wird mittels TG und DSC untersucht. Alle TG-Kurven lassen drei unterschiedliche Abschnitte erkennen, die der Destillation und zwei Verbrennungs- bzw. KrackvorgÄngen zuzuordnen sind. Die thermogravimetrischen Kurven wurden unter Verwendung eines kinetischen Modells des Arrhenius-Typs analysiert, wobei die Reaktionsordnung erhalten wurde. Die Reaktionsordnung scheint von körnigen Materialien nicht beeinflusst zu werden. Eine signifikante Verringerung der Aktivierungsenergie wurde durch Zusatz von Kaolinit zum Rohöl erzielt, was darauf hindeutet, dass Kaolinit einen katalytischen und OberflÄcheneffekt auf die Verbrennung bzw. auf Krackreaktionen des Rohöls ausübt.

РЕжУМЕ

тг И Дск БылИ ИспОльжО ВАНы Дль ИжУЧЕНИь ВлИьНИь пЕскА, кРЕМНИ ь И кАОлИНА НА гОРЕНИЕ сыРОИ НЕФтИ. Н А ВсЕх тг-кРИВых НАБлУ ДАлОсь тРИ РАжлИЧНыЕ ОБлАстИ, гл АВНыМ ОБРАжОМ — ОБлАсть пЕР ЕгОНкИ И ДВЕ ОБлАстИ гОРЕНИЕ/кРЕкИНг. тг-кР ИВыЕ БылИ АНАлИжИРОВ АНы НА ОсНОВЕ кИНЕтИЧЕск ОИ МОДЕлИ тИпА АРРЕНИ УсА И ОцЕНЕН пОРьДОк РЕАкцИИ. кАжЕ тсь, ЧтО пОРьДОк РЕАкцИИ Н Е жАтРАгИВАЕтсь пРИс УтстВИЕМ гРАНУлИРОВАННых МАт ЕРИАлОВ. ВМЕстЕ с тЕМ, пРИ ДОБАВлЕНИИ к АОлИНА В сыРУУ НЕФть, НАБлУДАлОсь жНАЧИНЕ льНОЕ пОНИжЕНИЕ ЕНЕР гИИ АктИВАцИИ. ЁтО УкАжыВ АЕт НА тО, ЧтО кАОлИН Вы жыВАЕт кАтАлИтИЧЕскИИ ЁФФЕ кт И ЁФФЕкт плОЩАДИ пОВЕРхНОстИ В РЕАкцИИ гОРЕНИЕ/кРЕ кИНг сыРОИ НЕФтИ.

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Author notes

  1. G. Bartlett

    Present address: West Indies University, St. Augustine, Trinidad

Authors and Affiliations

  1. Tertiary Oil Recovery Project, University of Kansas, USA

    S. Vossoughi, G. Willhite, Y. El Shoubary & G. Bartlett

Authors
  1. S. Vossoughi
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  2. G. Willhite
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  3. Y. El Shoubary
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  4. G. Bartlett
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Vossoughi, S., Willhite, G., El Shoubary, Y. et al. Study of the clay effect on crude oil combustion by thermogravimetry and differential scanning calorimetry. Journal of Thermal Analysis 27, 17–36 (1983). https://doi.org/10.1007/BF01907318

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  • DOI: https://doi.org/10.1007/BF01907318

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