Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry最新文献

POTENTIOMETRIC STUDIES AT ORNL WITH HYDROGEN ELECTRODE CONCENTRATION CELLS 氢电极浓度电池的电位测定研究

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1994-12-31 DOI: 10.2172/10117964

R. Mesmer, D. Palmer, D. Wesolowski

引用次数: 14

THERMODYNAMICS OF AQUEOUS ELECTROLYTES AT HIGH TEMPERATURES BY THE ISOPIESTIC TECHNIQUE 用等静压技术研究高温下水电解质的热力学

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1994-12-31 DOI: 10.2172/10118115

H. F. Holmes, R. Mesmer

{"title":"THERMODYNAMICS OF AQUEOUS ELECTROLYTES AT HIGH TEMPERATURES BY THE ISOPIESTIC TECHNIQUE","authors":"H. F. Holmes, R. Mesmer","doi":"10.2172/10118115","DOIUrl":"https://doi.org/10.2172/10118115","url":null,"abstract":"Excess thermodynamic properties of a wide variety of aqueous electrolyte solutions at elevated temperatures have been determined with the ORNL high-temperature isopiestic facility. This unique experimental apparatus provides very precise results over the useful temperature range of 110 to 250 C. The isopiestic method is a comparative technique which, in the present case, uses the Pitzer-Peiper-Busey formulation for NaCl(aq) as the reference electrolyte. At elevated temperatures the ion-interaction model of Pitzer continues to be the most useful description of the experimental results. The authors experimental program has included the alkali metal chlorides, sulfates, hydroxides, bromides, and bisulfates, the alkaline earth metal chlorides, and several specific compounds of scientific and practical interest. Numerous common-ion mixed electrolyte solutions have also been investigated in this program. In general, the activity coefficients of all the studied electrolytes decrease with increasing temperature. However, prominent differences between members of the same family remain, particularly when considered as the excess Gibbs free energy. The tendency for ion association increases with increasing temperature and becomes a factor at the higher temperatures. Trends and specific effects are illustrated with examples taken from the database generated in their high-temperature thermodynamic program.","PeriodicalId":121185,"journal":{"name":"Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129077821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

PHASE BEHAVIOR AND IN-SITU DENSITY DETERMINATION IN CONCENTRATED SALT SOLUTIONS UNDER HYDROTHERMAL CONDITIONS 水热条件下浓盐溶液的相行为和原位密度测定

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1994-10-01 DOI: 10.1615/icpws-1994.730

G. Anderson

引用次数: 0

REDUCTION OF NITRATE AND NITRITE SALTS UNDER HYDROTHERMAL CONDITIONS 水热条件下硝酸盐和亚硝酸盐的还原

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1994-10-01 DOI: 10.1615/icpws-1994.770

B. Foy, P. DellOrco, E. Wilmanns, R. McInroy, J. Ely, J. M. Robinson, S. Buelow

引用次数: 0

OPTICAL MONITORING OF THE OXIDATION OF METHANE IN SUPERCRITICAL WATER 超临界水中甲烷氧化的光学监测

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1994-08-01 DOI: 10.1615/icpws-1994.840

R. Steeper, S. F. Rice

{"title":"OPTICAL MONITORING OF THE OXIDATION OF METHANE IN SUPERCRITICAL WATER","authors":"R. Steeper, S. F. Rice","doi":"10.1615/icpws-1994.840","DOIUrl":"https://doi.org/10.1615/icpws-1994.840","url":null,"abstract":"Supercritical water oxidation is an emerging technology being developed by many laboratories and industries for the treatment of hazardous wastes. It is appropriate for the destruction of a wide variety of waste streams composed of up to 20% organics in water. Experiments were conducted in a static, high-pressure reactor to investigate the oxidation of methane in supercritical water. Pressures ranged from 138 to 275 bar, temperatures from 380 to 440{degrees}C, and equivalence ratios from 0.2 to 2.0 for initial methane concentrations around 0.1 mole/l. In these experiments, Raman spectroscopy was used as an in-situ diagnostic to monitor the concentrations of methane, oxygen, and carbon dioxide. Over this pressure range the reaction rate of methane with oxygen is unexpectedly observed to decrease with increasing pressure. A non-linear least squares fit was performed to determine four global reaction rate parameters. In contrast to results from experiments at lower initial methane concentrations, the reaction order dependency on methane is found here to be greater than unity. This finding implies that the former results cannot safely extrapolate to concentrations around 0.1 mole/l.","PeriodicalId":121185,"journal":{"name":"Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129302407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

HIGH HEATPROOF INSULATION SYSTEM USED IN HIGH TEMPERATURE STEAM ATMOSPHERE 适用于高温蒸汽环境的高耐热保温系统

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1900-01-01 DOI: 10.1615/icpws-1994.530

Tsukumo Iijima

引用次数: 0

DEVELOPMENT OF FUNDAMENTAL EQUATIONS G(P,T) AND BACKWARD EQUATIONS T(P,H) AND T(P,S) FOR THE NEW INDUSTRIAL FORMULATION 发展基本方程g (p, t)和逆向方程t (p, h)和t (p, s)为新的工业公式

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1900-01-01 DOI: 10.1615/icpws-1994.210

A. Kruse, W. Wagner

引用次数: 0

SPECTROSCOPIC EVIDENCE OF AGGREGATIVE PROPERTIES IN DEEPLY SUPERCOOLED WATER 深度过冷水中聚集性质的光谱证据

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1900-01-01 DOI: 10.1615/icpws-1994.410

S. Magazù, G. Maisano, D. Majolino, P. Migliardo

引用次数: 0

DEPOSITION IN POWER PLANTS - MECHANISMS AND IMPACT 发电厂中的沉积-机制和影响

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1900-01-01 DOI: 10.1615/icpws-1994.970

B. Warwood, F. Roe, J. Sears

引用次数: 0

RELATIONSHIP BETWEEN BOILER WATER-STEAM DISTRIBUTION COEFFICIENTS AND DISSOCIATION CONSTANTS OF CONTAMINANTS 锅炉水-蒸汽分配系数与污染物解离常数的关系

Proceeding of Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry Pub Date : 1900-01-01 DOI: 10.1615/icpws-1994.880

G. V. Vasilenko, V. I. Zarembo, A. Slobodov, R. Dooley

引用次数: 0