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Enhanced Oil Recovery using a Combination of Biosurfactants

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Published on: June 3, 2022

Enhanced oil-mineral aggregation with modified bentonite.

Li Chen¹, Yanbo Zhou, Xiaoqian Wang

¹College of Resource & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, China.

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|April 5, 2013

Summary

Modified bentonite significantly enhances oil-mineral aggregate (OMA) formation by improving hydrophobicity. This study reveals surface properties are key to OMA structure and formation efficiency.

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Area of Science:

Geochemistry
Materials Science
Colloid Science

Background:

Oil-mineral aggregate (OMA) formation is crucial in various industrial processes.
Understanding the role of bentonite's surface properties is essential for optimizing OMA formation.
Natural bentonite's hydrophilic nature can limit its effectiveness in certain applications.

Purpose of the Study:

To investigate the application of modified bentonite in oil dispersion and OMA formation.
To characterize the changes in bentonite's surface properties after modification.
To evaluate the impact of bentonite modification on OMA morphology and formation kinetics.

Main Methods:

Laboratory experiments were conducted to study OMA formation using natural and modified bentonite.
Bentonite modification involved attaching cetyltrimethyl ammonium bromide to enhance hydrophobicity.
Surface properties were characterized, and OMA formation was observed using fluorescence microscopy.
Factors such as shaking time, oil concentration, and mineral content were systematically varied.

Main Results:

Modification significantly improved bentonite's hydrophobicity and surface electric properties.
Natural bentonite formed spherical OMAs, while modified bentonite produced elongated and flake-like OMAs.
Oil concentration and mineral content were identified as critical factors influencing OMA formation.
OMA formation was rapid with both natural and modified bentonite.

Conclusions:

Bentonite's surface properties critically influence oil-mineral aggregate formation and morphology.
Modified bentonite demonstrates superior performance in OMA formation compared to hydrophilic natural bentonite.
The findings provide insights into tailoring bentonite for enhanced OMA formation in relevant applications.