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06:31
Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
Published on: March 18, 2020
Alcohol cosurfactants in hydrate antiagglomeration
J Dalton York1, Abbas Firoozabadi
1Department of Chemical Engineering, Mason Laboratory, Yale University, New Haven, CT 06520, USA.
The Journal of Physical Chemistry. B
|August 2, 2008
Summary
Natural gas hydrates can shut down operations. This study shows alcohol cosurfactants can prevent hydrate agglomeration, even when other antiagglomerants fail, offering a safer alternative.
Area of Science:
- Petroleum Engineering
- Chemical Engineering
- Materials Science
Background:
- Natural gas is a key 21st-century fuel, but hydrate formation poses operational risks.
- Current hydrate inhibitors (thermodynamic) have environmental and safety drawbacks.
- Low Dosage Hydrate Inhibitors (LDHI), including antiagglomerants (AA), are promising alternatives.
Purpose of the Study:
- To investigate the efficacy of alcohol cosurfactants in preventing hydrate agglomeration.
- To explore the synergistic effects of alcohol cosurfactants with existing antiagglomerants.
- To evaluate the performance of different types of antiagglomerants and cosurfactants.
Main Methods:
- Utilized a model system of oil, water, and tetrahydrofuran (a hydrate-forming agent).
- Tested mixtures of antiagglomerants with varying concentrations of alcohol cosurfactants.
- Assessed hydrate formation and agglomeration behavior under specific conditions.
Main Results:
- Alcohol cosurfactants, particularly methanol at 0.5 wt.%, significantly improved antiagglomeration performance.
- Agglomeration occurred without cosurfactants, regardless of antiagglomerant concentration.
- A quaternary ammonium chloride salt demonstrated effectiveness at very low concentrations (0.01 wt.%), while a rhamnolipid biosurfactant was effective at 0.5 wt.%.
Conclusions:
- Alcohol cosurfactants represent a novel and effective approach to hydrate antiagglomeration.
- This finding is crucial for developing safer and more environmentally friendly methods to mitigate hydrate issues in natural gas production.
- Further research into biochemical surfactants is warranted due to their lower toxicity and biodegradability.
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