التفاصيل البيبلوغرافية
| العنوان: |
Adsorption-desorption of n-c7 asphaltenes over micro- and nanoparticles of silica and its impact on wettability alteration |
| المؤلفون: |
Cortés, Farid Bernardo, Montoya, Tatiana, Acevedo, Sócrates, Franco Ariza, Camilo Andrés, Nassar, Nashaat N. |
| المصدر: |
CT&F - Ciencia, tecnología y futuro, ISSN 0122-5383, Vol. 6, Nº. 4, 2016, pags. 89-106 |
| سنة النشر: |
2016 |
| المجموعة: |
Dialnet - Portada de revistas (Universidad de La Rioja) |
| مصطلحات موضوعية: |
Adsorption, desorption, asphaltene, reversibility, wettability, silica, Adsorción, desorción, asfaltenos, humectabilidad, sílice, Adsorção, dessorção, asfalteno, reversibilidade, molhabilidade, sílica |
| الوصف: |
In this work, a study of the adsorption/desorption of n-C7 asphaltenes at low and high concentrations (100 - 30000 mg/L) was performed for which the effects of adsorbent particle size (nano and microsilica), pressure, solvent, and temperature were evaluated. Adsorption/desorption tests on different silica surfaces were performed in batch-mode using UV-vis spectrophotometry and thermogravimetric analyses. Owing to its high surface area and dispersibility, nanosilica adsorbed higher quantities of n-C7 asphaltenes than microsilica. Asphaltene desorption from nanosilica surface was significant, while the desorption from microsilica surfaces was insignificant, suggesting a higher adsorption potential for the latter. Asphaltene adsorption increased with pressure and decreased with temperature. Type of solvent plays a significant role on the asphaltene desorption. The wettability tests for virgin nanosilica and nanosilica contained adsorbed asphaltenes showed that even at high asphaltene loading, the nanoparticles maintained its water-wet nature. ; Resumo Neste trabalho foi realizado um estudo sobre a adsorção/dessorção de asfaltenos n-C7 em concentrações altas e baixas (100 - 30000 mg/L) no intuito de avaliar os efeitos do tamanho da partícula adsorvente (nano e microsílica), pressão, solvente e temperatura. Testes de adsorção/dessorção em diferentes superfícies de sílica foram realizados em série utilizando análises termogravimétricos e de espectrofotometria UV-vis. Vista sua grande área de superfície e capacidade de dispersão, a nanosílica adsorveu maiores quantidades de asfaltenos n-C7 do que a microsílica. A dessorção de asfalteno da superfície da microsílica foi insignificante, isso sugere a existência de um maior potencial de adsorção para a microsílica. A adsorção de asfalteno aumentou com a pressão e diminui com a temperatura. O tipo de solvente tem um papel preponderante na dessorção de asfalteno. Os testes de molhabilidade para nanosílica virgem e asfaltenos adsorvidos com conteúdo de nanosílica ... |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
https://dialnet.unirioja.es/servlet/oaiart?codigo=6155314 |
| الاتاحة: |
https://dialnet.unirioja.es/servlet/oaiart?codigo=6155314 |
| Rights: |
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| رقم الانضمام: |
edsbas.1EE81E8 |
| قاعدة البيانات: |
BASE |