Pressure drop and flow characteristic of CO2 hydrate slurry formation in the presence of anti-agglomerant in a flow loop facility

Prah, Benedict; Ren, Yun

doi:10.1007/s12206-021-0136-9

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…According to the mechanism of anti-agglomerant inhibitors, , the researchers found that the emulsification of surfactants had a prominent contribution to its inhibition. So far, many single-component surfactants have been found to have the effect of anti-agglomerant.…”

Section: Methodsmentioning

confidence: 99%

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Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Zhang

Zuo

et al. 2022

ACS Omega

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Adding low dosage hydrate inhibitors to the hydrate systems makes the generated hydrate particles more uniformly dispersed in the liquid phase, which can significantly reduce the hydrate accumulation and blockage in oil and gas pipelines. The effect of surfactant hydrophile–lipophilic balance (HLB) values on hydrate flow characteristics was studied with a flow loop. The experimental results showed that there was a critical HLB value. When the HLB value was 4.3–9.2, it had an inhibitory effect on the hydrate induction time, and when the HLB value was greater than 10.2, it had a promoting effect. The hydrate volume fraction increased gradually with the increase in the HLB value, while the slurry apparent viscosity decreased with the increase in the HLB value. It was also found that different types of surfactants all showed the effects of anti-agglomerant and dispersion, which can obviously improve the flow of the hydrate slurry. Finally, the analyzed results showed that the hydrate slurry exhibited shear-thinning behaviors that can be identified as a pseudoplastic fluid based on the Herschel–Bulkley rheological model, and the functional relationship between the rheological index and the solid phase hydrate volume fraction was obtained using the fitting method. This study can provide a reference for the preparation of high-efficiency hydrate anti-agglomerants.

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Section: Methodsmentioning

confidence: 99%

“…The HLB value is generally believed to be an additive, and the HLB value of the compound anti-agglomerant inhibitors can be calculated by the eq …”

Section: Methodsmentioning

confidence: 99%

Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Zhang

Zuo

et al. 2022

ACS Omega

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“…As an important parameter of slurry safe flow, pressure drop was affected by flow rate, water cut, initial pressure, hydrate volume fraction, and so on. Prah 36 and Yun studied the pressure drop characteristics of CO 2 hydrate in the flow loop and found that the pressure drop gradient increased with the increase of the average flow rate of hydrate. Basha 37 et al conducted slurry flow experiments with different water cuts and found that when the water cut was 0–40%, the pressure drop decreased, and with the increase of water cut, the pressure-drop increased.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Growth Kinetics of Natural Gas Hydrates in an Oil–Water Emulsion System

Zhang

Zhao

et al. 2021

ACS Omega

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In order to explore the growth kinetics characteristics of NGH (natural gas hydrate) in an oil and gas mixed transportation pipeline and ensure the safe transportation of the pipeline, with the high-pressure hydrate experimental loop, an experimental study on the growth characteristics of NGH in an oil–water emulsion system was carried out, and the effects of pressure, flow rate, and water cut on the hydrate induction time, gas consumption, consumption rate, and hydrate volume fraction were explored, and important experimental rules were obtained. The experiment was divided into three stages: in the rapid formation stage of the hydrate, the temperature and gas consumption rose sharply, and the pressure dropped suddenly. The induction time decreased with the increase of pressure, flow rate, and water cut. The induction time of 6 MPa was 86.13 min, which was shortened by 39.68% compared with the induction time of 142.8 min of 5 MPa. The induction time of 1500 kg/h was 88.27 min, which was shorter by 13.91% than that 102.53 min of 550 kg/h. The induction time of 20% water cut was 58.53 min, which was shorter by 13.99% than that 68.4 min of 15% water cut. The gas consumption and hydrate volume fraction were both increased with the increase of pressure and water cut and decreased with the increase in the flow rate. In the whole process of the formation of NGH, the consumption rate first increased and then decreased. The pressure-drop and apparent viscosity increased with the increase of hydrate volume fraction in a certain range. The sensitivity analysis of hydrate induction time based on the standard regression coefficient method showed that the initial pressure played a major role, followed by the flow rate and the water cut. Based on the sensitivity analysis of hydrate volume fraction by the gray correlation method, it was found that the hydrate volume fraction had the closest relationship with the initial pressure, followed by the flow rate and the water cut. Finally, the empirical formulas of induction time and hydrate volume fraction in an oil–water emulsion system were established.

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State-of-the-art of cold energy storage, release and transport using CO2 double hydrate slurry

Yang,

Chen,

Zhang

2024

Applied Energy

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Pressure drop and flow characteristic of CO2 hydrate slurry formation in the presence of anti-agglomerant in a flow loop facility

Cited by 5 publications

References 31 publications

Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Experimental Study of the Growth Kinetics of Natural Gas Hydrates in an Oil–Water Emulsion System

State-of-the-art of cold energy storage, release and transport using CO2 double hydrate slurry

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Pressure drop and flow characteristic of CO2 hydrate slurry formation in the presence of anti-agglomerant in a flow loop facility

Cited by 5 publications

References 31 publications

Study on the Formation Characteristics of CO2 Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Study on the Formation Characteristics of CO2 Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Experimental Study of the Growth Kinetics of Natural Gas Hydrates in an Oil–Water Emulsion System

State-of-the-art of cold energy storage, release and transport using CO2 double hydrate slurry

Contact Info

Product

Resources

About

Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants

Study on the Formation Characteristics of CO₂ Hydrate and the Rheological Properties of Slurry in a Flow System Containing Surfactants