yaeos__equilibria_rachford_rice Module

Uses

- yaeos__constants

Subroutines

public subroutine betalimits(z, K, bmin, bmax)

Define beta limits to avoid overshooting when solving the Rachford-Rice equation.

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=pr),	intent(in)			::	z(:)	Molar fractions vector
real(kind=pr),	intent(in)			::	K(:)	K-factors
real(kind=pr),	intent(out)			::	bmin	Minimum beta value
real(kind=pr),	intent(out)			::	bmax	Maximum beta value

public subroutine betato01(z, K)

Modify K-factor values to assure that $\beta$ lies between (0,1)

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=pr),	intent(in)			::	z(:)	Molar fractions of the system
real(kind=pr)				::	K(:)	K factors $\frac{y_i}{x_i}$

public subroutine rachford_rice(z, K, beta, rr, drrdb)

Rachford-Rice equation for a two phase system

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=pr),	intent(in)			::	z(:)
real(kind=pr),	intent(in)			::	K(:)
real(kind=pr),	intent(in)			::	beta
real(kind=pr),	intent(out)			::	rr
real(kind=pr),	intent(out)			::	drrdb

public subroutine solve_rr(z, K, beta, beta_min, beta_max)

Solve the Rachford-Rice Equation.

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=pr),	intent(in)			::	z(:)	Mole fractions vector
real(kind=pr),	intent(in)			::	K(:)	K-factors
real(kind=pr),	intent(out)			::	beta	$\beta$ value
real(kind=pr),	intent(out)			::	beta_min	Lower limit for $\beta$
real(kind=pr),	intent(out)			::	beta_max	Upper limit for $\beta$