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API TECH DATA BOOK

Technical Overview

An API Standard  - Developed/Maintained under API Funding for over
                                 50+ years.
Mission Statement: provide a critically reviewed compilation of the physical and thermodynamic data and correlations that are of most interest to petroleum refiners for process evaluation and equipment design

Provides the technical expert’s recommendations on what data and methods should be employed to accurately predict the phase equilibrium and thermo-physical properties of chemical and refining streams.

This information is necessary for the cost effective design of and for the safe and efficient operation of process units.

Stewardship/Critical Review – API Technical Data Committee

Over 10,000 copies of the printed Data Book have been sold in the US and abroad

Unmatched accuracy for key technical data used in the design and operation of chemical and refining facilities in the 9th Edition:

Hydrocarbon – Water Solubilities

Physical Properties of Sulfur Containing Components

Petroleum Fraction Characterization

An educational tool in thermodynamics for the practicing Chemical Engineer

Common Uses for API Tech

Independent cross-check of process simulator results

Research and development tool for conceptual design and feasibility studies

User-friendly design tool for engineers who infrequently use simulation software

Can be used as a basis for guarantees, commodity transfer, etc. as a commonly accepted industry standard

Useful in companies without readily available/timely technical support through a central engineering group

Good estimation tool for refineries and operating facilities (allows consistency with the central office)

Education/Training tool for young engineers and undergraduates in chemical engineering programs

Low-cost alternative for the consulting engineer to provide highly accurate flash and mixture properties of chemical and petroleum streams

Mutual Solubilities of Water-Hydrocarbon Systems

Can be Calculated on 3 Platforms in the API Tech Data Book

Direct Solubility Equation  (semi-empirical, temperature dependent correlation)

NRTL (Flash/Mixture Calculations)

SRK-Kabadi-Danner (Flash/Mixture Calculations)

The Solubility Equation provides the best fit of the experimental data (i.e. the correct answer)

NRTL parameters for 100+ hydrocarbons and water have been highly tuned to fit the experimental data and essentially provide the same results of the Solubility Equation plus extremely accurate solubility for:

Mixtures versus pure components

Pressures other than Atmospheric

Temperatures other than Ambient

SRK-KD provides reasonable estimates for Water-Hydrocarbon  when accurate NRTL parameters are not available