Release of Nitrogen Oxides into the Gas Phase Accompanying the Dissolution of Uranium Nitride in Nitric Acid

Atomic Energy ◽  
2015 ◽  
Vol 117 (6) ◽  
pp. 409-414 ◽  
Author(s):  
O. A. Ustinov ◽  
A. Yu. Shadrin ◽  
Yu. A. Voskresenskaya ◽  
S. A. Kulyukhin ◽  
A. A. Bessonov
Keyword(s):  
Nitric Acid ◽  
Nitrogen Oxides ◽  
Gas Phase ◽  
Uranium Nitride

A study of nitrogen oxides released into the gas phase during uranium nitride dissolution in nitric acid

2014 ◽  
Vol 304 (1) ◽  
pp. 425-428 ◽  
Author(s):  
S. A. Kulyukhin ◽  
A. Yu. Shadrin ◽  
Y. A. Voskresenskaya ◽  
A. A. Bessonov ◽  
O. A. Ustinov
Keyword(s):  
Nitric Acid ◽  
Nitrogen Oxides ◽  
Gas Phase ◽  
Uranium Nitride

The oxidation and absorption of nitrogen oxides in nitric acid in relation to the tail gas problem of nitric acid plants

1980 ◽  
Vol 35 (1-2) ◽  
pp. 145-153 ◽  
Author(s):  
J.B. Lefers ◽  
F.C. de Boks ◽  
C.M. van den Bleek ◽  
P.J. van den Berg
Keyword(s):  
Nitric Acid ◽  
Nitrogen Oxides

Protonated nitric acid. Structure and relative stability of isomeric H2NO3+ ions in the gas phase

1990 ◽  
Vol 112 (3) ◽  
pp. 1014-1018 ◽  
Author(s):  
Fulvio Cacace ◽  
Marina Attina ◽  
Giulia De Petris ◽  
Maurizio Speranza
Keyword(s):  
Nitric Acid ◽  
Gas Phase ◽  
Relative Stability ◽  
Acid Structure

The reaction of chlorine atoms, Cl(3 2pJ), with nitric acid in the gas phase

1982 ◽  
Vol 18 (1) ◽  
pp. 39-46 ◽  
Author(s):  
R.H. Clark ◽  
D. Husain ◽  
J.Y. Jezequel
Keyword(s):  
Nitric Acid ◽  
Gas Phase ◽  
Chlorine Atoms

Unexpected Reactivity of Amidogen Radical in the Gas Phase Degradation of Nitric Acid

2014 ◽  
Vol 136 (19) ◽  
pp. 6834-6837 ◽  
Author(s):  
Josep M. Anglada ◽  
Santiago Olivella ◽  
Albert Solé
Keyword(s):  
Nitric Acid ◽  
Gas Phase

The Chemistry and Characteristics of Nitric Acid-Graphite Intercalation

1982 ◽  
Vol 20 ◽  
Author(s):  
Sophia R. Su ◽  
Daniel W. Oblas
Keyword(s):  
Mass Spectrometry ◽  
Nitric Acid ◽  
Gas Phase ◽  
Contributory Factor ◽  
Fourth Stage ◽  
Acid Vapor ◽  
Step Process ◽  
Second Stage ◽  
Graphite Intercalation ◽  
One Step

ABSTRACTGas-phase intercalation of graphite by nitric acid is a one-step process. The weight uptake of the sample is a function of nitric acid vapor pressure. A pure second stage compound was formed when the HNO3 reservoir was maintained at 17°C. Only a fourth stage compound was formed when the acid was kept at 0°C. The product gases due to intercalation and gas species evolved during deintercalation were analyzed by mass spectrometry. NO2 and H2O were the major components detected from the intercalation product gases. A small amount of oxygen was also present. The existence of O2 is probably due to the photo-chemical decomposition of nitric acid. As such, the photodecomposition of nitric acid is not a contributory factor in the intercalation chemistry.

To the Problem of Reducing the Amount of Harmful Emissions when Refining Silver

2018 ◽  
Vol 284 ◽  
pp. 877-881
Author(s):  
Sergey E. Polygalov ◽  
S.A. Mastugin ◽  
E.A. Shadrina
Keyword(s):  
Nitric Acid ◽  
Nitrogen Oxides ◽  
Dissolution Rate ◽  
Rotating Disk ◽  
Oxidation Potential ◽  
Solution Temperature ◽  
Harmful Emissions ◽  
Environmentally Friendly Process ◽  
Silver Dissolution ◽  
Kinetics Of

The work is devoted to the study of the possibilities of minimizing the release of nitrogen oxides during the dissolution of silver in nitric acid solutions during refining of the gold and silver alloy. Using a rotating disk, the maximum concentration of nitric acid is determined, at which the oxidation potential of the system is insufficient for the oxidation of silver. It has been established that at a temperature of 363 K and a concentration of HNO3 = 50 g/l, the dissolution rate of silver does not exceed 0.00022∙10-5 mol/(cm2∙s), and such conditions can be considered as background for an environmentally friendly process. To initiate dissolution, hydrogen peroxide was used as an alternative oxidizing agent. As a criterion for the rational use of the oxidant and the ecological purity of the process, the excess pressure over the solution was evaluated. The influence of the initial and current composition of the solution, temperature, and conditions of oxidant supply to the reactor on the kinetics of the target process was studied. It is shown that at a silver dissolution rate of 2.7∙10-6 mol/(cm2∙s), no release of nitrogen oxides was observed.

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