Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination

What is it about?

This investigation aims to develop an accurate method to calculate the tangent slope (b) - a fundamental parameter to calculate gas diffusion coefficients under different pressures - using inflection point determinations.

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Why is it important?

Results showed that the first and the second derivatives calculated to define the first inflection points represent exactly the final limit of tangent slopes.