Sensitivity Analysis of Total Pressure and Feed Compositions in Equilibrium Flash Process.

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  • 平衡フラッシュ蒸留プロセスにおける全圧と供給組成に関する感度解析
  • ヘイコウ フラッシュ ジョウリュウ プロセス ニ オケル ゼンアツ ト キョウ

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Abstract

This paper presents analytical expressions of the sensitivity coefficients for the total pressure and the feed liquid compositions in the multicomponent equilibrium flash process. The partial derivatives of temperature with respect to the total pressure are derived analytically by extending the implicit function theorem. The distillation calculation methods which chose the M-1 feed compositions as the independent variables and the one feed composition as the dependent variable defined d-sensitivity coefficients to satisfy the stoichiometric equations. This paper assumes that all the M feed compositions are independent and defines i-sensitivity coefficients, which violate the stoichiometric equations of the liquid compositions. d-sensitivity coefficients can be obtained from i-sensitivity coefficients and not vice versa. Numerical solutions are shown for both sensitivity coefficients.

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