About the Petroleum Template

The Petroleum Template defines defaults commonly used in the petroleum industry. It is also appropriate for petrochemical applications such as ethylene plants, which involve petroleum

fractions as feedstocks.

This table shows the defaults used:

Specification	English Default	Metric Default
Units	F, psi, lb/hr, lbmol/hr, MMBtu/hr, bbl/day	C, bar, kg/hr, kmol/hr, MMkcal/hr, bbl/day
Physical property method	None	None
Free water	Yes	Yes
Flow basis	Standard liquid volume	Mass
Stream report composition	Standard liquid volume flow	Mass flow

Because petroleum applications encompass a wide range of boiling fractions/ components and process conditions, this Template does not have a default physical property method. These methods are used most frequently:

• BK10

• CHAO-SEA

• GRAYSON

• RK-SOAVE

• PENG-ROB

• IDEAL

You should consider additional methods for various operations within a refinery (such as ELECNRTL for sour water strippers and amine treatment units, and UNIFAC for aromatic extraction).

Aspen Plus provides comprehensive methods for analyzing assay data and automatically generating pseudocomponents. You can select from five built-in pseudocomponent property methods to characterize pseudocomponents. You can also enter curves of petroleum properties, such as sulfur and metal contents. Aspen Plus tracks these properties throughout the flowsheet. You can use them in design specifications, optimization constraints, and objective functions.

The Aspen Plus PetroFrac model simulates a wide range of fractionation units within a refinery. PetroFrac can model a tower with any number of:

• Side strippers, including the bottom liquid return to the main tower

• Pumparounds and bypasses

• Partial and total drawoffs

PetroFrac can model the feed furnace as an integral part of the tower, including the slop cut recycle for a vacuum unit. It lets you enter petroleum-specific property specifications, such as ASTM distillation temperatures, gaps, and overlaps. It also offers extensive column sizing and rating capabilities, including the ability to handle structured packings and integrated pressure drop calculations.

Petroleum Property Sets

In Aspen Plus, many properties can be used to characterize streams in a refinery. The Petroleum Template includes property sets for many widely used petroleum-related properties.

Property Set	Description
CUTS-E	Standard liquid volume flow of petroleum cuts at 100º F intervals. Valuable for concise reporting of stream composition.
CUTS-M D86-5	Mass flow rate of petroleum cuts at 50º C intervals. Valuable for concise reporting of stream composition. ASTM D86 temperature at 5 liquid volume %
D86-95	ASTM D86 temperature at 95 liquid volume %
GASPROPS	Vapor phase properties, including: Compressibility factor for a mixture Actual volume flow Standard vapor volume flow Heat capacity ratio (CP/CV)
KINVISC	Kinematic viscosity at 100°F and 212°F or 40°C and 100°C (dry basis)
LIGHT	Petroleum characteristics for light distillates (dry basis), including: Reid vapor pressure Flash point based on API method Aniline point
MIDDLE	Petroleum characteristics for middle distillates (dry basis), including: Cetane number Flash point based on API method Pour point based on API method Aniline point
PETRO †	General petroleum properties on dry basis, including: Standard liquid volume flow (bbl/day) and (bbl/hr) Standard API gravity Standard specific gravity Watson UOP K-factor True boiling point distillation curve ASTM D86 and D1160 distillation curves
TBP-5	True boiling point temperature at 5 liquid volume %
TBP-95	True boiling point temperature at 95 liquid volume %
†	Default for stream results

Petroleum Stream Report Options

The large number of pseudocomponents and distillation curves in a petroleum application can result in a lengthy stream report. The Petroleum Template defines several stream report format

(TFF) options so you can view or print subsets of stream information:

Дата добавления: 2015-07-15