TECHNIQUE OF MEASUREMENTA

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• graph of flow rate vs applied pressure is plotted when the sample is wet and hence it is called wet curve.

• Same graph is plot when the sample is in dry stateand hence it is called dry curve.

• The flow and pressure values are halved to obtain the half dry graph.

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From the three curves the maximum, mean and minimum pore sizes are obtained.

 

• The point at which the gas flow is recorded refers to the first bubble point or largest pore size.

• The point at which the wet curve and half dry curve meet corresponds to the mean pore size.

• The point at which the wet and dry curve meet corresponds to the smallest pore size.

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