Cyclopentane hydrate wettability measurements used to evaluate the efficacy of oil natural surfactants using ultra-low volume samples

Stoner, Hannah M.; Moak, Jefferson; Delgado-Linares, Jose G.; Koh, Carolyn A.

doi:10.1016/j.fuel.2023.129422

Cited by 2 publications

References 62 publications

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An Experimental Investigation of the Hydrate Formation Mechanism in the Throttling of Carbon Dioxide-Containing Trace Moisture

Xu,

Dai

et al. 2024

Processes

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Carbon capture, utilization and storage are facilitated through carbon dioxide (CO2) transport. Pipe transportation is the main method for transporting CO2. However, hydrate blockages reduce transport efficiency in the pipelines, and the throttling devices are the main location of hydrate blockages. In this paper, the mechanism of hydrate formation in the throttling of CO2-containing trace moisture was investigated. The throttling device in a pipe was mimicked using a cylindrical orifice plate. The work also studied the effects of moisture content, upstream pressure and upstream temperature on hydrate formation. The results indicate that the Joule–Thomson cooling effect is a key contributor, and promotes the condensation of trace moisture, resulting in the free water necessary for hydrate nucleation. Under the effect of gas flow back-mixing, it is easy for the hydrate to adhere to the inner surface of the pipe behind the orifice plate. When the moisture content in the gas increases from 123 μmol/mol to 1024 μmol/mol, the hydrate induction time decreases from infinity to 792 s. However, the moisture content has no effect on the adhesion strength of the hydrate to the inner surface of the pipe. When the initial upstream pressure increases from 2.0 MPa to 3.5 MPa, the hydrate induction time decreases from infinity to 306 s. When the upstream temperature decreases from 291.15 K to 285.15 K, the hydrate induction time decreases from infinity to 330 s. With the decrease in the initial upstream temperature, the adhesion of hydrate particles to the inner surface of the pipe is promoted. This study provides experimental evidence for the characteristics of hydrate formation in the process of CO2 throttling.

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An Experimental Investigation of the Hydrate Formation Mechanism in the Throttling of Carbon Dioxide-Containing Trace Moisture

Xu,

Dai

et al. 2024

Processes

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Hydrate Non-Plugging Evaluation of Crude Oils in Varying Shear Environments

Greener,

Castrejon-Miranda,

Delgado-Linares

et al. 2024

Day 4 Thu, May 09, 2024

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Establishment of the tendency of crude oils to disperse hydrates formed during slurry transport is of foremost importance when designing and implementing mitigation strategies in the field. In this work, high pressure quantitative rheological measurements were compared with visual qualitative agglomeration rocking cell results to quantify the impact of shear on the non-plugging performance of a crude oil. Shear rate in the rocking cell apparatus was modeled using computational fluid dynamics simulations and allowed acquired rocking cell data to be compared to rheological data on the basis of shear rate. Rocking cell visual agglomeration data were found to agree qualitatively with measured rheology results using this crude oil. It was found that increasing shear rate in rheology experiments lowered the final value of relative viscosity of the slurry. Contact angle and film growth measurements allowed for an improved mechanistic agglomeration understanding to be developed in this work. The use of variable shear comparisons provide important insight into not only the capability of oils to transport hydrates naturally, but also the range of applicability of data acquired using various benchtop experimental equipment.

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Cyclopentane hydrate wettability measurements used to evaluate the efficacy of oil natural surfactants using ultra-low volume samples

Cited by 2 publications

References 62 publications

An Experimental Investigation of the Hydrate Formation Mechanism in the Throttling of Carbon Dioxide-Containing Trace Moisture

An Experimental Investigation of the Hydrate Formation Mechanism in the Throttling of Carbon Dioxide-Containing Trace Moisture

Hydrate Non-Plugging Evaluation of Crude Oils in Varying Shear Environments

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