Título: | PERSPECTIVES ON MECHANICAL BEHAVIOR AND INHIBITOR EFFICIENCY IN CYCLOPENTANE HYDRATES | ||||||||||||
Autor: |
MARINA RIBEIRO BANDEIRA |
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Colaborador(es): |
MONICA FEIJO NACCACHE - Orientador GUSTAVO ALONSO BARRIENTOS SANDOVAL - Coorientador |
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Catalogação: | 13/AGO/2024 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=67548&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=67548&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.67548 | ||||||||||||
Resumo: | |||||||||||||
Within the realm of the oil and gas industry, the disruption of production
and transportation lines due to the accumulation of organic and inorganic
compounds poses a widespread and significant challenge, resulting in
considerable financial losses and environmental concerns. Gas hydrates,
particularly emphasized among various challenges related to inorganic
deposition, present a complex issue characterized by the formation of
crystalline water-based solids, akin to ice, occurring under conditions of high
pressure and low temperatures that arise when light hydrocarbon molecules
and water combine to form a specific ordered structure. Hydrate formation
begins at the water-hydrocarbon interface, highlighting the critical role
interfacial rheology plays in this process. Despite the importance of this
interface in hydrate formation, a research gap persists, particularly in the
employment of shear rheology approaches. This study aids in bridging this
gap by investigating the mechanical and flow properties of the interface,
utilizing a resource in a rotational rheometer, a double-wall ring cell, for
precise temperature control. Cyclopentane serves as the hydrate former,
allowing experimentation under atmospheric pressure and varied
temperatures. Protocols explore temperature and hydrocarbon concentrations,
with an emphasis on the involvement of ice crystals in the early stages of
hydrate formation. Following complete saturation of the hydrocarbon/water
interface by hydrates, interfacial elastic and viscous moduli are obtained
through strain sweeps to assess hydrate film fragility and mechanical
response. Additionally, the impact of aging time and shear type (static or
dynamic) on hydrate stiffness is examined. Tests with thermodynamic
inhibitors, such as sodium chloride and monoethylene glycol, demonstrate a
significant extension of the induction time. Furthermore, systematic changes
in shear rate are investigated to comprehensively understand their influence
on the characteristics and properties of the hydrated film under various shear
history conditions. Overall, this research sheds light on the nuances of waterhydrocarbon interface dynamics in hydrate formation and mitigation.
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