Nucleation, growth, and agglomeration in barium sulfate turbulent precipitation

• Published in: AIChE journal Vol. 48; no. 9; pp. 2039 - 2050
• Main Authors: Marchisio, Daniele L., Barresi, Antonello A., Garbero, Mirko
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.09.2002; Wiley Subscription Services; American Institute of Chemical Engineers
• Subjects: Applied sciences; Chemical engineering; Cross-disciplinary physics: materials science; rheology; Crystallization, leaching, miscellaneous separations; Exact sciences and technology; Growth from solutions; Materials science; Methods of crystal growth; physics of crystal growth; Physics; Turbulent flow; Sodium Sulfates; Agglomeration; Alkaline earth metal Compounds; Inorganic compound; Micromixing; Probability density function; Crystal growth from solutions; Crystal nucleation; Particle shape; Macromixing; Crystal morphology; Tubular reactor; Computational fluid dynamics; Chemical precipitation; Barium Chlorides; Crystals; Crystallization; Moment method; Theoretical study; Experimental study; Population balance; Particle size distribution; Barium Sulfates; Numerical simulation; Aqueous solution
• ISSN: 0001-1541; 1547-5905
• DOI: 10.1002/aic.690480917

In this work barium sulfate precipitation is studied in a tubular reactor in a wide range of operating conditions. The effect of reactant concentrations and barium or sulfate excess on crystal‐size distribution and morphology is investigated. Experimental results show that ion excess has a strong influence and that at high concentration aggregation takes place. Computational fluid dynamics is coupled with the finite‐mode probability density function approach for taking into account both macro‐ and micromixing, whereas the population balance is treated by using the standard moment method. Comparison with experimental data suggests that when micromixing and agglomeration are properly taken into account, the agreement is improved. However, this statement is partially affected by the lack of knowledge in barium sulfate kinetics.