Bioethanol Plant Case

[David Ulo]

I am trying to simulate a bioethanol production case on aspen plus and I got this error message. Also what property methods and options is preferred for biomass(Rice Straw). Any suggestions would be of great help.
Thank you.


->Processing input specifications ...

THE PAIR PARAMETERS FOR ELECNRTL OPTION SET HAS BEEN RETRIEVED FROM
DATABANK ENRTL-RK.

MW ENTERED FOR COMPONENT LIGNIN IS DIFFERENT FROM MW
CALCULATED FROM FORMULA (ATOMNO/NOATOM). ENTERED VALUE IS USED.
ENTERED MW = 1512.000 CALCULATED MW = 1513.605

* WARNING IN PHYSICAL PROPERTY SYSTEM
PARAMETER RKTZRA/ELEMENT 1 (DATA SET 1)
LOWER BOUND VIOLATED FOR COMPONENT CELLU-01
VALUE = 0.10000E-01, LOWER BOUND = 0.60000E-01

* WARNING IN PHYSICAL PROPERTY SYSTEM
PARAMETER PLXANT (DATA SET 1) FOR COMPONENT CELLU-01:
UNREASONABLE VAPOR PRESSURE CALCULATED AT TEMPERATURE UPPER BOUND.
VALUE SHOULD BE LESS THAN MAXIMUM ALLOWABLE VALUE
= 0.10000E+36 N/SQM. PLEASE CHECK YOUR INPUT FOR THE
ANTOINE PARAMETERS.

* WARNING IN PHYSICAL PROPERTY SYSTEM
PARAMETER PLXANT (DATA SET 1) FOR COMPONENT SODIU-01:
UNREASONABLE VAPOR PRESSURE CALCULATED AT NORMAL BOILING POINT.
VALUE SHOULD BE WITHIN 10% OF 1D5 N/SQM. PLEASE CHECK YOUR INPUT
FOR THE ANTOINE PARAMETERS.


->Table Generation begins ...

->Table generation completed