Electrical Conductances of Aqueous Solutions at High Temperature and Pressure. II. The Conductances and Ionization Constants of Sulfuric Acid—Water Solutions from 0 to 800° and at Pressures up to 4000 Bars1,2

1965 ◽  
Vol 69 (8) ◽  
pp. 2726-2735 ◽  
Author(s):  
Arvin S. Quist ◽  
William L. Marshall ◽  
H. R. Jolley
Keyword(s):  
Sulfuric Acid ◽  
High Temperature ◽  
Aqueous Solutions ◽  
Acid Water ◽  
Ionization Constants ◽  
Water Solutions ◽  
Electrical Conductances ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

scholarly journals Researches Regarding a Protein Hydrolysate Used as Adjuvant in Fertilization Process

2019 ◽  
Vol 76 (2) ◽  
pp. 78
Author(s):  
Elena Mihaela NAGY ◽  
Constantin COȚA ◽  
Nicolae CIOICA ◽  
Zoltan GYORGY ◽  
Lucian FECHETE-TUTUNARU ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
High Temperature ◽  
Phosphoric Acid ◽  
Alkaline Hydrolysis ◽  
Potassium Hydroxide ◽  
Protein Hydrolysate ◽  
Raw Material ◽  
Urea Content ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

Within the paper the results of conducted researches in order to obtain a protein hydrolysate from wool waste as raw material are presented. The experiments were conducted in two variants: a) alkaline hydrolyse using potassium hydroxide, a mix of potassium hydroxide with urea and a mix of potassium hydroxide with sodium hydroxide as well as b) acidic hydrolyse with sulfuric acid or a mix of sufuric acid with phosphoric acid in different proportions. The parameters intervals used were: pH 0,5-2,5 for acidic hydrolyse and pH 9,5-13,5 for the alkalinic one; temperatures between 120-150 °C and pressures between 1,4-4,6 bar. Acid hydrolysis is favored by the high proportion of sulfuric acid, phosphoric acid, a low pH and from high temperature and pressure. The alkaline hydrolysis is favored by a pH higher then 12 as well as the urea content. A high temperature and pressure has a beneficial effect over alkaline hydrolysis.

Salt solubility and deposition in high temperature and pressure aqueous solutions

AIChE Journal ◽  
2004 ◽  
Vol 50 (9) ◽  
pp. 2038-2049 ◽  
Author(s):  
Marc Hodes ◽  
Peter Griffith ◽  
Kenneth A. Smith ◽  
Wilbur S. Hurst ◽  
Walter J. Bowers ◽  
...  
Keyword(s):  
High Temperature ◽  
Aqueous Solutions ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

High‐temperature and ‐pressure system for laser Raman spectroscopy of aqueous solutions

1988 ◽  
Vol 59 (10) ◽  
pp. 2247-2253 ◽  
Author(s):  
N. A. Marley ◽  
M. Ott ◽  
B. L. Fearey ◽  
T. M. Benjamin ◽  
P. S. Z. Rogers ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Temperature ◽  
Aqueous Solutions ◽  
Laser Raman Spectroscopy ◽  
Pressure System ◽  
Laser Raman ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

scholarly journals Impact of High Temperature and Pressure to Steel Passivation in CO2 Atmosphere

2021 ◽  
Vol 68 (2) ◽  
pp. 447-457
Author(s):  
Mojca Slemnik
Keyword(s):  
Activation Energy ◽  
Sulfuric Acid ◽  
High Temperature ◽  
Surface Analysis ◽  
Corrosion Behaviour ◽  
Iron Carbonate ◽  
Corrosion Rates ◽  
High Temperature And Pressure ◽  
Temperature And Pressure ◽  
Co2 Atmosphere

The corrosion behaviour of AISI 347 in 0.1 M sulfuric acid at temperatures 50 and 75 °C and pressures up to 300 bar in a CO2 atmosphere was studied by surface analysis and electrochemical methods. Corrosion reactions in which CO2 is present accelerate the formation of a protective FeCO3 layer, but the success of such a passivation depends on the saturation concentration and the corresponding temperature. Significantly better results compared to untreated steels were obtained at lower temperatures by increasing the pressure. To explain the differences in corrosion rates between samples, the activation energy for the layer dissolution was also discussed. It can be assumed that the compressibility of the CO2 at different pressures has an influence on the formation of the protective iron carbonate layer and its properties and thus to on the corrosion behaviour.

Sign in / Sign up

Export Citation Format

Share Document