Autor(es)

Costa do Nascimento, Debora ; Chiarello, Conrado ; Marinho Barbosa Neto, Antonio ; Sum, Amadeu K. ; da Costa, Mariana Conceicao

• Tipo de documento: Artigo Científico
• Fonte: ENERGY & FUELS; v. 39, n. 23, p. 11-pg., 2025-05-29.

Resumo

Gas hydrates are nonstoichiometric solid solutions formed by water and gas. They are formed under high-pressure and low-temperature conditions, which are prevalent in deep-water offshore oil and gas extraction operations. The formation of hydrates during production can lead to flowline obstruction and damage to pipes, fittings, and valves, which can ultimately cause line rupture. Therefore, in the oil/gas industry, the risk associated with hydrates must be minimized by either avoiding formation or at least managing it. Alternative solvents such as ionic liquids (ILs) have been extensively tested as thermodynamic or kinetic hydrate inhibitors in the past decade in stirring cells or rocking cells. Protic ionic liquids (PILs), however, have been overlooked. Hydrate formation in the presence of ILs under conditions closer to the actual flowline environment and the concomitance of an oil phase have also been neglected in the published literature. As such, the aim of this study is to assess methane hydrate formation and dissociation in the presence of PILs obtained from precursors ethanolamines and short-chain organic acids, which act as thermodynamic inhibitors. The efficiency of such compounds as gas hydrate inhibitors was studied by using a rock-flow cell apparatus with aqueous solutions containing 10 wt % PIL in systems with and without mineral oil. It was possible to check for the formation of plugs or bed of hydrates and observe slurry instability, pressure/temperature profiles, and water conversion in both scenarios. Surface and interface tensions were also accounted for. (AU)

• Processo FAPESP: 22/05244-4 - Líquidos iônicos próticos como inibidores de hidratos
• Beneficiário: Débora Costa do Nascimento
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 20/06315-7 - Líquidos iônicos próticos como inibidores da formação de hidratos
• Beneficiário: Débora Costa do Nascimento
• Modalidade de apoio: Bolsas no Brasil - Doutorado