Crude Oil Distillation Simulation
(Z-BaSIC CODS
ä )What is CODS
äCODS
ä is a true process simulator, relying on molecular level composition and properties of a process stream. The input data is a 'cp' file as described elsewhere. The 'cp' file may be an original file on a crude oil, a reverse engineered file from an Assay, an output file from another Z-BaSICä simulator, BLEND or an update from MONITOR.CODS
ä simulates a batch pot distillation. The user chooses the number of ideal stages to apply, which can be fractionally varied from 0 to 30 theoretical stages. For ASTM D-2892 distillations the number of ideal stages can be varied from cut to cut according to the schedule provided. Temperatures and pressures of each cut point, up to 40 fractions are also specified by the user. For ASTM D-86 distillations the pressure is fixed at atmospheric pressure and the number of stages is preprogrammed according to common experience.Once the cutpoints and number of stages have been set the program is launched. The program searches for the bubble point of the first drop, cooling the pot if necessary. The dew composition is compared with the bubble composition and the compositions are numerically iterated until they agree with the composition specified by the Fenske equation for the number of stages specified. A drop is taken overhead and the process is repeated until the distillation is complete.
For each fraction, a 'cp' file of the fraction is generated for use in further CODS
ä processing, composition reporting, property reporting, or for input to Blend or other process simulators. CODSä is the first known simulator that simulates the distillation of petroleum or petroleum products at the molecular level. It has been shown to be accurate in terms of replicating the number of stages, accounting for non-ideal Raoult's Law behavior and vacuum distillation.A paid-up license to CODS
ä is provided with your order of five (5) or more 'cp' files.