nitric acid at elevated temperaturesBan, Yasutoshi 
; Hakamatsuka, Yasuyuki; Tsutsui, Nao 
; Urabe, Shunichi; Hagiya, Hiromichi; Matsumura, Tatsuro
Optical absorption spectra of Np in 3 mol/dm nitric acid at elevated temperatures were measured using an optical glass cell with a water jacket having a light path of 1 cm, and molar extinction coefficients of Np(VI), 
, were obtained at various temperature. The values of was found to decrease with increasing the temperature, and could be described by the equation = -0.14
+85.5, where is the temperature. Oxidation of Np(V) to Np(VI) in 3 mol/dm nitric acid at elevated temperatures was observed using the optical glass cell. Oxidation of Np(V) proceeded as pseudo-first order with respect to Np(V) concentration. The rate equation in the temperature range of 336-362 K was obtained as follows: -d[Np(V)]
/dt = 2.2
10
exp[-6510/(
)][Np(V)], where 
and [Np(V)] indicate the gas constant and Np(V) concentration at time 
, respectively.
Language |
: | English |
|---|---|---|
Journal |
: | |
Volume |
: | 102 |
Number |
: | 9 |
Pages |
: | p.775 - 780 |
Publication Year/Month |
: | 2014/09 |
Paper URL |
: |
|
Keywords |
: | no keyword |
Research Facility |
: |
Accesses |
: |
- Accesses |
|---|---|---|
InCites™ |
: |
Percentile:36.96 Category:Chemistry, Inorganic & Nuclear |
Altmetrics |
: |
[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.
