scholarly journals Thermodynamic analysis of copper(I) sulfide chlorination by calcium chloride in the presence of oxygen

1999 ◽  
Vol 64 (5-6) ◽  
pp. 365-374 ◽  
Author(s):  
Rajko Vracar ◽  
Katarina Cerovic
Keyword(s):  
Calcium Chloride ◽  
Thermodynamic Analysis ◽  
Chemical Reactions ◽  
Phase Stability ◽  
Log P ◽  
Temperature Range ◽  
Stability Diagrams

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.

Theoretical analysis and experiments for the carburization of vanadium-bearing hot metal

2018 ◽  
Vol 115 (2) ◽  
pp. 204
Author(s):  
Deng Ma ◽  
Wei Wu ◽  
Shifan Dai ◽  
Zhibin Liu
Keyword(s):  
Theoretical Analysis ◽  
Thermodynamic Analysis ◽  
Induction Furnace ◽  
Cost Effective ◽  
Pilot Scale ◽  
Hot Metal ◽  
Temperature Range ◽  
Vanadium Extraction ◽  
Low Nitrogen

In this study, the feasibility of the carburization of vanadium-bearing hot metal was first investigated by thermodynamic analysis. Next, three carburizers, namely a low-nitrogen carburizer, anthracite, and coke, were used for carburization of 500 g of vanadium-bearing hot metal at 1450 °C, 1500 °C, and 1550 °C, respectively. The carbon increments for the low-nitrogen carburizer, anthracite and coke followed decreasing order in the temperature range from 1450 °C to 1550 °C. Anthracite was the most cost-effective carburizer. Hence, anthracite is used in pilot-scale experiments of the vanadium-bearing hot metal (100 kg and 200 kg). Finally, vanadium extraction experiments of the vanadium-bearing hot metal were carried out in a top-bottom-combined blowing induction furnace. It is proved that the average superheat degree of semi-steel increases from 100 °C to 198 °C by the carburization of vanadium-containing hot metal.

Unravelling the chemical reactions of fatty acids and triacylglycerides under hydrodeoxygenation conditions based on a comprehensive thermodynamic analysis

2018 ◽  
Vol 112 ◽  
pp. 37-44 ◽  
Author(s):  
Diego Valencia ◽  
Isidoro García-Cruz ◽  
Víctor Hugo Uc ◽  
Luis Felipe Ramírez-Verduzco ◽  
Myriam A. Amezcua-Allieri ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Thermodynamic Analysis ◽  
Chemical Reactions

Thermodynamic Analysis of Phase Behavior at High Capillary Pressure

SPE Journal ◽  
2018 ◽  
Vol 23 (06) ◽  
pp. 1977-1990 ◽  
Author(s):  
Mohsen Rezaveisi ◽  
Kamy Sepehrnoori ◽  
Gary A. Pope ◽  
Russell T. Johns
Keyword(s):  
Phase Behavior ◽  
Capillary Pressure ◽  
Thermodynamic Analysis ◽  
Phase Stability ◽  
Tangent Plane ◽  
General Purpose ◽  
Distance Method ◽  
Capillary Equilibrium ◽  
Production Behavior ◽  
Reservoir Simulator

Summary High capillary pressure has a significant effect on the phase behavior of fluid mixtures. The capillary pressure is high in unconventional reservoirs because of the small pores in the rock, so understanding the effect of capillary pressure on phase behavior is necessary for reliable modeling of unconventional shale-gas and tight-oil reservoirs. As the main finding of this paper, first we show that the tangent-plane-distance method cannot be used to determine phase stability and present a rigorous thermodynamic analysis of the problem of phase stability with capillary pressure. Second, we demonstrate that there is a maximum capillary pressure (Pcmax) where calculation of capillary equilibrium using bulk-phase thermodynamics is possible and derive the necessary equations to obtain this maximum capillary pressure. We also briefly discuss the implementation of the capillary equilibrium in a general-purpose compositional reservoir simulator. Two simulation case studies for synthetic gas condensate reservoirs were performed to illustrate the influence of capillary pressure on production behavior for the fluids studied.

Bonding Calcium Chloride and Calcium Nitrate into Stable Hydration Portland Cement Products: Stability Conditions of Calcium Hydrochloraluminates and Calcium Hydronitroaluminates

2018 ◽  
Vol 36 ◽  
pp. 69-73 ◽  
Author(s):  
Andrii A. Plugin ◽  
Raisa F. Runova
Keyword(s):  
Portland Cement ◽  
Calcium Chloride ◽  
Thermodynamic Analysis ◽  
Calcium Nitrate ◽  
Cement Matrix ◽  
Stability Conditions ◽  
Decomposition Reactions ◽  
Tricalcium Aluminate

A thermodynamic analysis of the reactions of calcium chloride and calcium nitrate with tricalcium aluminate when used as a hardening accelerator for portland cement, as well as decomposition reactions of calcium hydrochloraluminate (CHChA) and calcium hydronitroalyuminate (CHNA) formed during the hardening was performed. The conditions of stable existence of CHChA and CHNA in the cement matrix were established.

Thermodynamic analysis of phase stability of nanocrystalline titania

1998 ◽  
Vol 8 (9) ◽  
pp. 2073-2076 ◽  
Author(s):  
Hengzhong Zhang ◽  
Jillian F. Banfield
Keyword(s):  
Thermodynamic Analysis ◽  
Phase Stability ◽  
Nanocrystalline Titania

The computer algorithm and program for the generation of phase stability diagrams

Calphad ◽  
1990 ◽  
Vol 14 (3) ◽  
pp. 257-264 ◽  
Author(s):  
C.R. Wang ◽  
Z.B. Zhao ◽  
S.K. Xia ◽  
W.Q. Zhang ◽  
R.Z. Zhu
Keyword(s):  
Phase Stability ◽  
Computer Algorithm ◽  
Stability Diagrams
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