Analytical Modeling of Calcium Carbonate Deposition for Laminar Falling Films and Turbulent Flow in Annuli: Part II—Multispecies Model

1991 ◽  
Vol 113 (3) ◽  
pp. 741-746 ◽  
Author(s):  
S. H. Chan ◽  
K. F. Ghassemi
Keyword(s):  
Experimental Data ◽  
Calcium Carbonate ◽  
Transport Model ◽  
Recent Experimental Data ◽  
Deposition Flux ◽  
Heated Plate ◽  
Carbonate Deposition ◽  
Multispecies Model ◽  
Calcium Carbonate Deposition ◽  
Good Agreement

The present study proposes a multispecies transport model to predict calcium carbonate deposition. The model has been applied to predict the deposition flux, the mean fouling layer thickness, and the profile of local fouling thickness along a heated plate of a laminar falling film. Good agreement is found when comparing with experimental data. Similarly, the model is applied to predict the fouling layer in a turbulent annulus flow system and a good agreement of the predicted results is also found with recent experimental data. Finally, solutions in dimensionless forms are presented to show the effects of various dimensionless parameters on calcium carbonate deposition.

Environment of calcium carbonate deposition west of Andros Island, Bahamas

10.3133/pp350 ◽  
1962 ◽  
Author(s):  
Preston E. Cloud ◽  
P.D. Blackmon ◽  
F.D. Sisler ◽  
Henry Kramer ◽  
J.H. Carpenter ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Carbonate Deposition ◽  
Andros Island ◽  
Calcium Carbonate Deposition

scholarly journals A Novel Method for Calcium Carbonate Deposition in Wood That Increases Carbon Dioxide Concentration and Fire Resistance

Coatings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 72
Author(s):  
Vicente Hernandez ◽  
Romina Romero ◽  
Sebastián Arias ◽  
David Contreras
Keyword(s):  
Carbon Dioxide ◽  
Weight Gain ◽  
Calcium Carbonate ◽  
Fire Resistance ◽  
Carbon Dioxide Concentration ◽  
Wood Products ◽  
Vacuum Impregnation ◽  
Carbonate Deposition ◽  
Novel Method ◽  
Calcium Carbonate Deposition

In this study, a novel method for calcium carbonate deposition in wood that increases carbon dioxide concentration and fire resistance is proposed. The method promoted the mineralization of radiata pine wood microstructure with calcium carbonate by using a process consisting in the vacuum impregnation of wood with a calcium chloride aqueous solution and the subsequent sequential diffusion of gaseous ammonium and carbon dioxide. In the most favorable conditions, the method yielded a weight gain of about 20 wt.% due to mineralization, which implied the accumulation of 0.467 mmol·g−1 of carbon dioxide in the microstructure of wood. In addition, a weight gain of about 8% was sufficient to provide fire resistance to a level similar to that achieved by a commercially available fire-retardant treatment. The feasibility of retaining carbon dioxide directly inside the wood microstructure can be advantageous for developing wood products with enhanced environmental characteristics. This method can be a potential alternative for users seeking materials that could be effective at supporting a full sustainable development.

scholarly journals Studies on Calcium Carbonate Deposition of a Calcareous Red Alga Serraticardia maxima

1970 ◽  
Vol 83 (984) ◽  
pp. 193-201 ◽  
Author(s):  
Megumi OKAZAKI ◽  
Tomoyoshi IKAWA ◽  
Kurazo FURUYA ◽  
Kazutosi NISIZAWA ◽  
Tomoo MIWA
Keyword(s):  
Calcium Carbonate ◽  
Red Alga ◽  
Carbonate Deposition ◽  
Calcium Carbonate Deposition

scholarly journals Calcium cyclic carboxylates as structural models for calcium carbonate scale inhibitors

CrystEngComm ◽  
2020 ◽  
Vol 22 (15) ◽  
pp. 2585-2592
Author(s):  
Yuexian Hong ◽  
Dmitry S. Yufit ◽  
Nathalie Letzelter ◽  
Jonathan W. Steed
Keyword(s):  
Molecular Structure ◽  
Calcium Carbonate ◽  
Significant Variation ◽  
Structural Models ◽  
Carbonate Deposition ◽  
Calcium Complexes ◽  
Calcium Carbonate Deposition ◽  
Structure Lead ◽  
Calcium Carbonate Scale ◽  
Inhibition Ability

Calcium complexes of cyclic oligocarboxylic acids have been studied as models to understand how subtle changes in molecular structure lead to significant variation in inhibition ability for calcium carbonate deposition

IONIZATION POTENTIALS OF ALKYL FREE RADICALS AND n-ALKANES THROUGH C17H36 BY ENERGY-CALIBRATED MOLECULAR ORBITAL METHODS

1966 ◽  
Vol 44 (12) ◽  
pp. 1455-1462 ◽  
Author(s):  
Charles E. Melton ◽  
Hubert W. Joy
Keyword(s):  
Experimental Data ◽  
Free Radicals ◽  
Molecular Orbital ◽  
Ionization Potentials ◽  
Recent Experimental Data ◽  
Normal Alkanes ◽  
Atomic Orbitals ◽  
Large Molecules ◽  
Good Agreement ◽  
Expansion Scheme

Ionization potentials are calculated by simple energy-calibrated molecular orbital techniques for the normal alkanes through C17H36 and for some normal and branched alkyl free radicals. A model is formulated which allows the computations to be extended to extremely large molecules by using "radical" orbitals as well as atomic orbitals in the expansion scheme. Auto-ionization levels as well as ionization potentials are calculated for the radicals. Computed and observed values are in good agreement where recent experimental data are available.

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