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Showing 1 to 15 of 15 for “"chemical equilibria"”.
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The effect of high pressure on substitution reactions and chemical equilibria
x, 167 leaves : ill. ; 26 cm.
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Surface Charge Regulation Effects on Fluidic Nanoscale Systems
… of the uid that includes nite-size e ects. Chemical equilibria at the interface is accounted for by coupling these methods with charge regulating theory. The e ects of charge regulation lead to several novel predictions about uidic nanoscale systems including pH dependent conductivities, …
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The Volumetric Properties for Selected Impurities in Dense CO2 Destined for Re-Injection
… can impact the thermophysical properties and chemical equilibria within the fluid stream. In this work, the volumetric influence of H2S, COS, CS2, SO2, and O2 impurities in a dense CO2 phase were studied through high-precision density measurements. The densities were used in calculating the …
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Equilibrium Study of the Three Component System Oxalic Acid — Sodium Oxalate — Water at 25°
The experimental measurement of chemical equilibria frequently presents problems of considerable difficulty. In some cases the position of equilibrium may be such that the reaction goes nearly to completion in one direction, resulting in an extremely small concentration of one or more of the …
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Feasibility studies of the exhaust-gas reforming of hydrocarbon and alcohol fuels
… a theoretical approach is reported. Complex chemical equilibria and energy balance software has been developed, and used to simulate exhaust-gas reforming reactions for n-heptane and methanol feedstocks. Engine combustion of reformed fuel compositions thus predicted has then been modelled by …
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Adverse Effects of Crack/Cocaine to Marine Organisms Affected by Acidification Conditions
… carbon system is one of the most important chemical equilibria in the ocean and is largely responsible for controlling seawater’s pH. Once pH values decreased, organic compound may also suffer some alterations in bioavailability. Based on that, the hypothesis of this work is that the …
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Simultaneous chemical reaction and distillation of formaldehyde
… process in which the components react chemically. The formaldehyde-methanol-water system was selected and only the reversible reactions between formaldehyde and water giving methylene glycol and between formaldehyde and methanol producing hemiformal were assumed to occur under the …
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Mechanism of the NiCoFe ternary alloy deposition
… Fe rate, but also the inhibited Co and Ni rates. Chemical equilibria of metal sulfates, bisulfate, metal hydroxides and boric acid are included in the hydroxide model, which permit a more realistic hydrogen ion diffusion coefficient to be used in the simulation.
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Purification of phosphoric acid by solvent extraction
… The work was divided into two main areas, (i) chemical and physical measurements on the three-phase system, with or without impurities; (ii) process simulation and optimization. The object was to test the process technically and economically and to optimise the type of solvent. The chemical …
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Photoconductivity studies of the ferrocyanide ion under high pressure
… in aqueous solution was dependent upon secondary chemical equilibria which were sensitive to pressure in a predictable way. Inethanolic solution, the dependence of photocurrent yield on pressure followed the variation of the reciprocal solvent viscosity. In both aqueous and alcoholic solution, the …
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Quantifying polyphosphate energy for modelling of polyphosphate accumulating organisms behaviour in anaerobic digestors
… from both AS and AD systems with comprehensive chemical analyses and mass balance validations. Two conceptual models were evaluated for PolyP release stoichiometry in AD: one incorporating PHB formation with PolyP energy utilization, and another assuming direct PolyP release without PHB …
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Geochemical controls on the fluid evolution of submarine and subaerial ore-forming hydrothermal systems
… in ore-forming hydrothermal environments. Geochemical modeling using the Gibbs free energy minimization method is employed to evaluate chemical equilibria between fluids and minerals in these complex multicomponent systems. A case study on hydrothermal processes at mid-ocean ridges shows that …
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Halogens and trace elements in subduction zones
… in forsterite and forsterite-humite chemical equilibria were explored in the system Mg2SiO4-MgF2 by first principles computations. The pressure-volume equations of state and ground-state energies were determined for orthorhombic Mg2SiO4-Mg2F4 solutions, fluorine-bearing end-members of …
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The generation and application of metallurgical thermodynamic data
… of thermodynamics in the calculation of complex chemical and metallurgical equilibria of importance to industry has, over the last 15 years, been considerably enhanced by the availability of computers. It has resulted in the storage of data in databanks, the use of physical but complex models to …