A simple but sound approach for processing crystal growth kinetic data

2011 ◽  
Vol 89 (10) ◽  
pp. 2049-2053
Author(s):  
Issam Khaddour ◽  
Fernando Martins ◽  
Fernando Rocha
Keyword(s):  
Crystal Growth ◽  
Kinetic Data ◽  
Growth Kinetic

Calculation of the kinetics of crystallization based on a single batch experiment

1989 ◽  
Vol 54 (12) ◽  
pp. 3187-3197 ◽  
Author(s):  
Jaroslav Nývlt
Keyword(s):  
Crystal Growth ◽  
Size Distribution ◽  
Kinetic Data ◽  
Growth Kinetic ◽  
Crystal Size ◽  
Batch Crystallization ◽  
Crystallization Experiment ◽  
Kinetics Of ◽  
Single Batch ◽  
Kinetics Of Crystal Growth

The kinetics of crystal growth and nucleation in dependence on the supersaturation of a solution of KCL were evaluated based on a single batch crystallization experiment, where the supersaturation was monitored refractometrically and the product crystal size distribution was established at the end of the experiment. The crystal growth kinetic data obtained compare well with published values, for the nucleation data the agreement is less satisfactory.

Thermodynamic and crystal growth kinetic study of uranium peroxide

CrystEngComm ◽  
2013 ◽  
Vol 15 (12) ◽  
pp. 2305 ◽  
Author(s):  
Séverine Planteur ◽  
Murielle Bertrand ◽  
Edouard Plasari ◽  
Bruno Courtaud ◽  
Jean-Philippe Gaillard
Keyword(s):  
Crystal Growth ◽  
Kinetic Study ◽  
Growth Kinetic ◽  
Uranium Peroxide

Influence of Diffusion and Convective Transport on Dendritic Growth in Dilute Alloys

1981 ◽  
Vol 9 ◽  
Author(s):  
M. E. Glicksman ◽  
Narsingh Bahadur Singh ◽  
M. Chopra
Keyword(s):  
Crystal Growth ◽  
Kinetic Data ◽  
Dendritic Growth ◽  
Solute Concentration ◽  
Convective Transport ◽  
Morphological Stability ◽  
Dilute Alloys ◽  
Crystal Growth Kinetics ◽  
Growth System ◽  
Tip Radius

ABSTRACTExtensive experimentation has been carried out in which the kinetics and morphology of dendritic growth were measured as a function of thermal supercooling, solute concentration, and spatial orientation of the dendritic growth axis. The crystal growth system studied is succinonitrile [NC(CH2)2CN] with additions of argon (up to 0.1 mole %). This system is especially useful as a model for alloy studies because kinetic data are available for high purity (7–9's) succinonitrile. The addition of argon provides a simple, controllable dilute solute that now permits the first comparably detailed dendritic growth studies on binary alloys.One dramatic influence of the solute, at fixed thermal supercooling, is to increase the growth velocity (to a maximum) and correspondingly decrease intrinsic crystal dimensions (tip radius). Morphological measurements will be described in detail relating tip size, perturbation wavelength, supercooling, and solute concentration. The analysis of these effects based on morphological stability theory will also be discussed. Finally, experiments permitting the separation of convective and diffusive heat transport during crystal growth of succinonitrile will be described briefly. These studies clearly underscore the importance of gravitationally-induced buoyancy effects on crystal growth kinetics and morphology.

Preparation and characterization of calcium oxalate dihydrate seeds suitable for crystal growth kinetic analyses

2018 ◽  
Vol 500 ◽  
pp. 91-97 ◽  
Author(s):  
Anamarija Stanković ◽  
Jasminka Kontrec ◽  
Branka Njegić Džakula ◽  
Davor Kovačević ◽  
Berislav Marković ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Calcium Oxalate ◽  
Growth Kinetic ◽  
Calcium Oxalate Dihydrate ◽  
Oxalate Dihydrate

Conversion Processes in Anaerobic Digestion

1983 ◽  
Vol 15 (8-9) ◽  
pp. 127-167 ◽  
Author(s):  
W Gujer ◽  
A J B Zehnder
Keyword(s):  
Anaerobic Digestion ◽  
Organic Material ◽  
Kinetic Data ◽  
Growth Kinetic ◽  
Particulate Material ◽  
Anaerobic Digester ◽  
Loading Rates ◽  
Hydrolysis Of

Six different conversion processes are identified in the degradation of particulate organic material (biopolymers) to methane. Hydrolysis of particulate material is followed by the degradation of the hydrolysis and intermediary products by five independent groups of microorganisms. Process and growth kinetic data for the six processes are reviewed. The kinetic data are applied to the design of an anaerobic digester for raw domestic sludge. Variations in loading rates primarily affect acetate decarboxylation and, thereby, may cause shifts in pH which, in turn, cause the digester to operate in the acidic regime.

Comparison of Growth Kinetic of Urinary Crystallites from Patients with Calcium Oxalate Stones with that from Healthy Subjects

2013 ◽  
Vol 781-784 ◽  
pp. 1016-1019
Author(s):  
Yun Feng Shang ◽  
Li Kuan ◽  
Jun Fa Xue ◽  
Jian Ming Ouyang
Keyword(s):  
Particle Size ◽  
Crystal Growth ◽  
Formation Process ◽  
Healthy Subjects ◽  
Growth Kinetic ◽  
Growth Process ◽  
Growth Control ◽  
Renal Calculi ◽  
Growth Time ◽  
Healthy Urine

The differences of growth kinetic of urinary crystallites from patients with CaOxa stones and healthy subjects were compared. With the increase of crystal growth time (t), the size of urinary crystallites from patients increased constantly from 10±9 μm att=1 h to 50±45 μm att=72 h, but the number of urinary crystallites decreased gradually from 1820±610 ind./mm2att=1 h to 220±98 ind./mm2att=72 h, indicating that the formation process of crystallites in lithogenic urine was ascribed to growth control. In contrast, for healthy subjects, the number of crystallites increased from 1650±850 ind./mm2att=1 h to 1800±830 ind./mm2att=72 h. However, the particle size was slowly increased from 7±5 μm att=1 h to 14±13 μm att=72 h, while the sizes of most urinary crystallites were still less than 20 μm, indicating that the growth process of crystallites in healthy urine was dominated by nucleation control. The differences mentioned above are mainly attributed to that both the concentration and the activity of the inhibitors in healthy urine were higher than those in lithogenic urine, and the inhibitors in healthy urine can inhibit the growth and aggregation of urinary crystallites more effectively. This result can help to elucidate the renal-calculi formation mechanism.

Determination of crystallization kinetics from batch experiments II

1983 ◽  
Vol 48 (10) ◽  
pp. 2767-2776 ◽  
Author(s):  
Jaroslav Nývlt ◽  
Stanislav Žáček
Keyword(s):  
Crystal Growth ◽  
Size Distribution ◽  
Crystallization Kinetics ◽  
Kinetic Data ◽  
Batch Experiments ◽  
Aluminium Sulphate ◽  
Batch Crystallization ◽  
Relative Kinetic ◽  
Crystal Product

Relations have been derived for the size distribution of crystal product of batch crystallization with constant and variable supersaturation, applicable where the distribution cannot be approximated by the relation holding for continuous MSMPR crystallizers. In the cases considered, relative kinetic data, but not the kinetic exponents of nucleation and crystal growth, can be evaluated for model experiments involving any variation of supersaturation with time. Application of the relationships is illustrated by treating data for potassium aluminium sulphate precipitation.

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