The absorption process as talung place m a plungmg Jet system IS mvestigated Startmg from the assumption that the site of the mam mass transfer process 1s the submerged blphaslc Jet, a physrcal model is developed and a mass transfer equation IS estabhshed In the second section of the paper, a cntena
D2. Absorption of nitrogen tetroxide by water jets
β Scribed by H. Kramers; M.P.P. Blind; E. Snoeck
- Publisher
- Elsevier Science
- Year
- 1961
- Tongue
- English
- Weight
- 684 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0009-2509
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β¦ Synopsis
water jets of diierent lengths were exposed to a pure NOs/NsO, mixture at pressures between 0 06 and 0.3 atm. The amounts of HNO, and HNOs found by chemical analysis in the liquid leaving this absorption system were interpreted in terms of the absorption of NsO, and its subsequent reaction. The manner in which these NsO, absorption rates depend on the partial NsO4 pressure and the jet length strongly support the working hypothesis that NsO4 is preferentially absorbed under simultaneous reaction with water according to a fairly rapid first order rate formula. From these measurements, vah~es for H d/k,D and kI (ff = solubility coetEcient of NsO* in water, D = diffusivity of NsOd in water, kI = reaction velocity constant) at 20 and 30 "C were obtained. R&mm&On a expose des jets d&u (avec des longueurs d'environ 2,4 et 8 cm) 51 une m&nge gaxeuse de NO, et NsOa a des pressions totales entre 0,06 et 0,3 atm. Les quantiffi de HNO, et HNO, d&ermin6es par analyse chimique dam la liquide, qui sortait du systeme d'absorption, ont et6 inter-pret&s comme le r&&at de l'absorption de NsO,. Alors on a pu calculer de ces analyses la vitesse d'absorption de NsO, en fonction de la pression partielle de NsO, pour de-s longeuers ditferentcs du jet. Ces relations sonten bon accord avec la th6orie selon laquelle le NsOd est absorb6 par preference dans l'eau en r&&ant au m&ne temps selon une loi de vitesse de premiere ordre. On a obtenu des valeurs pour H 4 k,D et kI a 20 et 30 "C (H = coefficient de solubilite de NsO, dans l'eau, D = coefficient de diffusion de NsO, dans l'eau, kr = constante de vitesse de la &&ion). Zusamme&asung-Laminate Wasserstrahlen von verschiedenen Ungen wurden bei Drucken von 0,06 und 43 atm. mit reinen NOs/NsO,-Gemischen in Reruhrung gebracht. Die HNOs-und NHOs-Mengen in der Fltissigkeit, welche dieses Absorptionssystem verl&st, wurden durch chemische Aralyse ermittelt und auf absorbiertes und bei der n&&ten Reaktion umgesetxtes NsO1 umgerechnet. Der Zusammenhang xwischen den NsO,Absorptionsgeschwindigkeiten ememeits und dem partiellen NsOo-Druck und der Liinge des Strahles anderzrseits untersttitxt weitgehend die Arbeitshypothese, dam das Ns04 unter gleichxeitiger tmd mlativ schneller Reaktion mit Wasser gem&s einer Gleichung von der ersten Ordnung vorxugsweise absorb& wird. Aus diesen Messungen wurden bei Temperaturen von 20 turd 30 "C Werte fbr H 4 k,D und k, abgeleitet (H = L6sligkeitskoefIixient von NsOp in Wasser, D = Diffusionskonstante von NsO, in Wasser, kI = Reaktionsgeschwindigkeitskonstante).
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