The Calculus of the Operation Parameters at Pressure of the Primary Separation Column of the 15N Production Plant

Axente, D.; Balla, Ancuţa; Bugeac, Stefan; Gligan, M. L.; Marcu, C

doi:10.37358/rc.17.11.5922

Cited by 2 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), among them the run (2) has been done independently of the primary column (P.C.) and in the runs (3,9,11,12) the final column was fed with 10M nitric acid extracted from the bottom of the primary column.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The Production of the Isotope 15N by Isotopic Exchange in Nitrox System at Pressure

Axente¹,

Bugeac²,

Gergely³

et al. 2019

Rev. Chim.

Self Cite

View full text Add to dashboard Cite

The operation of 15N production plant at pressure of 0.7 +/- 0.05 bar in stable conditions at total reflux and in production is demonstrated. The 10M HNO3 flows used in the primary column were 6.6 L/h and 6.0 L/h, 47, respectively 33% higher than that of atmospheric pressure (4.5 L/h) and corresponding flow rates of the same column were 3.12 mL/cm2. min, respectively 2.83 mL/cm2.min for operation at pressure, compared to 2.12 mL/cm2�.min at atmospheric pressure. The 10M HNO3 flows used in the final column were 324 mL/h and 264 mL/h, 62, respectively 32 % higher than that of the atmospheric pressure (200 mL/h) and flow rates of that column were: 3.05 mL/cm2.min, respectively 2.49 mL/cm2.min, compared to 1.86 mL/cm2�.min for atmospheric pressure operation. The HETP values are lower for both separation columns operated at pressure and higher 10M HNO3 flow rates, that being an argument in the favour of operation the 15N production plant by isotopic exchange in Nitrox system at pressure. The nitrogen enriched in 15N losses in the waste sulphuric acid, evacuated at the bottom of product refluxer stage II, were : 5.18 -10.58 ppm of feeding with 10M HNO3 of the plant. Any losses of nitrogen enriched in 15N represent an additional uncontrolled production, which diminishes the production of 15N plant. In the case of operation at pressure the flows of H15NO3 extracted as plant product are higher than those corresponding to atmospheric pressure because the nitric acid solution is chemically equilibrated with nitrogen oxides at the operation pressure and temperature. At a pressure of 1 atm. in the 15N production plant the nitrogen content of nitric acid solution would be 10.919M instead of 10M.

show abstract

Section: Resultsmentioning

confidence: 99%

“…were done in the same way as it was presented for the final column; that column has been fed with 10M nitric acid solution at 4.5 -6.6 L/h., the flow rates being between 2.12 and 3.12 mL/cm 2 .min (table 1). The flow rates increasing were possible according to the increasing of the sulphur dioxide pressure feeding the refluxers at 0.9 bar [9].…”

Section: Resultsmentioning

confidence: 99%

The Production of the Isotope 15N by Isotopic Exchange in Nitrox System at Pressure

Axente¹,

Bugeac²,

Gergely³

et al. 2019

Rev. Chim.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Sulfur dioxide affects the environment in different ways, like direct absorption in water, acid rains and health damages [2,[18][19]. The concentration of SO 2 in residual gases emitted by thermal power plants is about 0.15-0.25%.…”

mentioning

confidence: 99%

Absorption of Sulfur Dioxide in Water with High Salinity

Pincovschi¹,

Modrogan²

2019

Rev. Chim.

View full text Add to dashboard Cite

Understanding the absorption behaviour of sulphur dioxide in aqueous electrolyte solutions is of major interest for the design of flue gas desulphurization processes, as for example wet flue gas desulphurization of coal fired power plants or municipal solid waste incineration plants. In the present paper the influence of the water salinity on SO2 absorption is studied. The SO2 absortion was performed in equilibrium condition. The variation of marine solubility from 10 g/L to 40 g/L determines the variation of SO2 concentration in water from 2.6 mol/L to about 3.2 mol/L. In consequence, the variation of water salinity in these limits can detemine a quite big difference of water pollution.

show abstract

The Calculus of the Operation Parameters at Pressure of the Primary Separation Column of the 15N Production Plant

Cited by 2 publications

References 3 publications

The Production of the Isotope 15N by Isotopic Exchange in Nitrox System at Pressure

The Production of the Isotope 15N by Isotopic Exchange in Nitrox System at Pressure

Absorption of Sulfur Dioxide in Water with High Salinity

Contact Info

Product

Resources

About