Performance Evaluation Of Solvents Blend For Silicone Defoamer

Project and Seminar Material for Petroleum Engineering

Performance Evaluation Of Solvents Blend For Silicone Defoamer


Foam are substances that are been formed when pockets of gases are trapped in a liquid or solid. Foam stabilizations are caused by van der waals force between molecules, there are conditions required for foaming to occur. Foams have different applications that are been utilised in their different forms. Defoamers are substances that hinders the formation of foam in liquids. The purpose of the defoaming test is to check the performance of silicone defoamer as an antifoaming agent after meeting some certain criteria. They are different method that can be used to test for defoamers which include the bartsch method, ross-miles test, automated shake test (AST) and foam rise method. The foam rise method was used to carry out this investigation. The foam sample used for this research was crude oil foam

Defoamers used for this experiment were improvised with solvents and silicone. Silicone was mixed with`each of the solvents in different proportions. During the experiment, physical properties of the components and defoamers were determined with measuring instruments and visual examinations. Different parameters were used to rate the defoamerโ€™s performance. Charts in which the parameters were used to compare the defoamers were depicted

Chapter Five

Conclusions and Recommendations

5.1 Conclusions

This research has enabled the combination of silicone with various solvents and its blends to produce different defoamers. The physical properties of the defoamers were also studied. Some of the defoamers were effective in the foam medium. The collapse rate required for the foam column to collapse served as the determining property for fast and slow defoamers.

5.2 Recommendations

The foamy liquid used in this research experiment was formed from the crude oil emulsion. From the analysed results defoamer B could be preferred among others in the crude oil flow station as an incentive against foaming. Defoamer B has the highest foam level reduction in 30secs when 15 ppm of it was added to the foam medium.
The effectiveness of these defoamers can also be tested in other foaming media apart from crude oil foams.

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