Analysis of coal-liquefaction separations with pseudocomponents

Technical Report · Tue Jun 01 00:00:00 EDT 1982

OSTI ID:5010479

Wojtowicz, R J; Bigot, P C

Three physical-property correlations and four vapor-liquid equilibrium-calculation methods were evaluated to determine which combination best characterized coal liquids vapor-liquid equilibria. Use of Wilson's correlation best predicted molecular weight and critical pressure with an average deviation (for 95% confidence) of 7.4 and 10.4%, respectively. Both the Starling and Wilson correlations were used to fit critical temperature and acentric factor within an average deviation (for 95% confidence) of 2.1 and 20.8, respectively. The Redlich-Kwong-Soave equation of state yielded the most accurate K-value predictions, with the average absolute relative deviations ranging from 5 to 50%. The Peng-Robinson equation of state was best near the critical temperature at high pressures, with average absolute relative deviations of 5 to 60%. The sensitivity of the results to pseudocomponent characterization was investigated, and recommendations for future work was done.

• Research Organization: Oak Ridge National Lab., TN (USA); Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5010479
• Report Number(s): ORNL/MIT-344; ON: DE82016602
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600* -- Coal
Lignite
& Peat-- Properties & Composition
COAL LIQUEFACTION
COAL LIQUIDS
COMPUTER CALCULATIONS
CORRELATIONS
CRITICAL PRESSURE
CRITICAL TEMPERATURE
DATA
EQUATIONS
EQUATIONS OF STATE
EQUILIBRIUM
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
LIQUEFACTION
LIQUIDS
MOLECULAR WEIGHT
NUMERICAL DATA
PHYSICAL PROPERTIES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPORS