APPLICATION OF THERMODYNAMIC ANALYSIS FOR EVALUATION OF POSSIBILITY OF COURSE OF CHEMICAL REACTIONS IN MEMORIES OF THE ARCHITECTURE OF STONE MANUFACTURERS

This paper presents a thermodynamic analysis of possible, but insufficiently studied, chemical reactions occurring during the chlorination of copper(I) sulfide by calcium chloride in the presence of oxygen. It formed the basis for assessing the probability and priority of their occurrence. Phase stability diagrams have been plotted for the Cu-S-O-Cl system in the coordinates log p(S2)-log p(O2)-log p(Cl2) in the temperature range from 473 to 773 K.

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Thermodynamic Analysis of the Formation of Aluminum and Chrome Halides for Circular Chrome-Aluminizing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.473 ◽

2016 ◽

Vol 685 ◽

pp. 473-476 ◽

Cited By ~ 1

Author(s):

Konstantin Bakhrunov

Keyword(s):

Thermodynamic Analysis ◽

Chemical Reactions

The work presents a thermodynamic analysis assessing the formation of aluminum and chrome halides for diffusion chrome-aluminizing of the surface of nickel heat-proof alloys in activated gases. The author has established chemical reactions that are responsible for the process of circular chrome-aluminizing and the arrangement scheme of initial technological components.

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Cobalt Complexes of Tripodal Hexadentate Ligands: Electrochemically Driven Rearrangements

Australian Journal of Chemistry ◽

10.1071/ch06257 ◽

2006 ◽

Vol 59 (11) ◽

pp. 783 ◽

Cited By ~ 5

Author(s):

Paul V. Bernhardt ◽

Yang Kim ◽

Sujandi

Keyword(s):

Cyclic Voltammetry ◽

Crystal Structures ◽

Thermodynamic Analysis ◽

Chemical Reactions ◽

Digital Simulation ◽

Cobalt Complexes ◽

Tripodal Ligands ◽

Formal Potential ◽

Working Electrode ◽

Kinetic And Thermodynamic Analysis

The CoIII complexes of the hexadentate tripodal ligands HOsen (3-(2´-aminoethylamino)-2,2-bis((2´´-aminoethylamino)methyl)propan-1-ol) and HOten (3-(2´-aminoethylthia)-2,2-bis((2´´-aminoethylthia)methyl)propan-1-ol) have been synthesized and fully characterized. The crystal structures of [Co(HOsen)]Cl3∙H2O and [Co(HOten)](ClO4)Cl2 are reported and in both cases the ligands coordinate as tripodal hexadentate N6 and N3S3 donors, respectively. Cyclic voltammetry of the N3S3 coordinated complex [Co(HOten)]3+ is complicated and electrode dependent. On a Pt working electrode an irreversible CoIII/II couple (formal potential –157 mV versus Ag|AgCl) is seen, which is indicative of dissociation of the divalent complex formed at the electrode. The free HOten released by the dissociation of [Co(HOten)]2+ can be recaptured by Hg as shown by cyclic voltammetry experiments on a static Hg drop electrode (or in the presence of Hg2+ ions), which leads to the formation of an electroactive HgII complex of the N3S3 ligand (formal potential +60 mV versus Ag|AgCl). This behaviour is in contrast to the facile and totally reversible voltammetry of the hexaamine complex [Co(HOsen)]3+ (formal potential (CoIII/II) –519 mV versus Ag|AgCl), which is uncomplicated by any coupled chemical reactions. A kinetic and thermodynamic analysis of the [Co(HOten)]2+/[Hg(HOten)]2+ system is presented on the basis of digital simulation of the experimental voltammetric data.

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Designed Solution to Coat Titanium Sheets with Octacalcium Phosphate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.361-363.665 ◽

2007 ◽

Vol 361-363 ◽

pp. 665-668 ◽

Cited By ~ 1

Author(s):

Christiane Xavier Resende ◽

Gustavo Mendes Platt ◽

Jean Dille ◽

Ivan Napoleão Bastos ◽

Gloria Dulce de Almeida Soares

Keyword(s):

Calcium Phosphate ◽

Thermodynamic Analysis ◽

Chemical Reactions ◽

Experimental Tests ◽

Octacalcium Phosphate ◽

Characterization Techniques

In this work, a solution able to precipitate calcium phosphate in titanium samples was studied. At first, a thermodynamic analysis of the proposed solution was conducted using a computational simulator that considers most of chemical reactions and evaluates parameters such as activity of species. After this procedure, experimental tests were performed in order to confirm this precipitation. With the use of TRIS at concentration of 50mM, the deposits were basically composed of octacalcium phosphate, as confirmed in some characterization techniques. The deposit presents a thickness of approximately 15μm after a 7-day exposure in the designed solution.

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Thermodynamic analysis of fluids with the possible presence of chemical reactions

Energy Conversion and Management ◽

10.1016/s0196-8904(01)00122-4 ◽

2002 ◽

Vol 43 (13) ◽

pp. 1619-1637 ◽

Cited By ~ 1

Author(s):

G. Bisio ◽

M. Cartesegna ◽

G. Rubatto

Keyword(s):

Thermodynamic Analysis ◽

Chemical Reactions

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Thermodynamic analysis of chemical reactions in the systems FeSi–Ca(OH)2–H2O and FeSi2–Ca(OH)2–H2O

Voprosy Khimii i Khimicheskoi Tekhnologii ◽

10.32434/0321-4095-2019-127-6-136-143 ◽

2019 ◽

pp. 136-143

Author(s):

A.O. Musina ◽

◽

O.O. Sihunov ◽

T.V. Kravchenko ◽

A.O. Hura ◽

...

Keyword(s):

Thermodynamic Analysis ◽

Chemical Reactions

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Thermodynamic analysis of carbon formation conditions in a steam methane reforming process

Thermal Science ◽

10.2298/tsci190404136p ◽

2020 ◽

pp. 136-136

Author(s):

Dmitry Pashchenko ◽

Maria Gnutikova

Keyword(s):

Thermodynamic Analysis ◽

Chemical Reactions ◽

Operating Conditions ◽

Mass Action ◽

Equilibrium Analysis ◽

Methane Reforming ◽

Carbon Formation ◽

Operational Conditions ◽

Steam Methane Reforming ◽

Steam Methane

Thermodynamic equilibrium analysis of the steam methane reforming process to synthesis gas was studied. For this purpose, the system of chemical reactions for carbon production and consumation as well as other side reaction in the steam methane reforming process were analysed. The material balance and the equations of law mass action were obtained for various chemical reactions. The system of those equations were solved by dichotomy method. The investigation was performed for a wide range of operational conditions such as a temperature, pressure, and inlet steam-to-methane ratio. The results obtained, with the help of developed algorithms, were compared with the results obtained via different commercial and open-source programs. All results are in excellent agreement. The operational conditions for the probable formation of carbon were determined. It was established that for the temperature range above 1100K the probability of carbon formation is absent for steam-to-methane ratio above units. The presented algorithm of thermodynamic analysis gives an appearance of the dependence of the product composition and the amount of required heat from operating conditions such as the temperature, pressure and steam-to-methane ratio.

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