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Titolo:
High temperature reaction of Sn(P-3(0)) atoms with O-2 based on SN- and O-concentration measurements
Autore:
Takahashi, K; Giesen, A; Roth, P;
Indirizzi:
Univ duisburg, Inst Verbrennung & Gasdynam, D-47048 Duisburg, Germany Univduisburg Duisburg Germany D-47048 sdynam, D-47048 Duisburg, Germany
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 19, volume: 3, anno: 2001,
pagine: 4296 - 4300
SICI:
1463-9076(2001)3:19<4296:HTROSA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
KINETICS; OXIDATION; CO2; N2O;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Roth, P Univ duisburg, Inst Verbrennung & Gasdynam, D-47048 Duisburg, Germany Univ duisburg Duisburg Germany D-47048 D-47048 Duisburg, Germany
Citazione:
K. Takahashi et al., "High temperature reaction of Sn(P-3(0)) atoms with O-2 based on SN- and O-concentration measurements", PHYS CHEM P, 3(19), 2001, pp. 4296-4300

Abstract

The reaction of Sn(P-3(o)) atoms with O-2 has been studied over the temperature range 1300 to 2250 K and the total density range 2.5 x 10(18) to 5.4 x 10(18) molecules cm(-3) by using a shock tube equipped for atomic resonance absorption spectroscopy (ARAS). Tetramethyltin was used as a precursor of Sn(P-3(o)) atoms. The overall rate coefficient was determined from the pseudo-first-order decay of Sn(P-3(o)) atoms to be k(Sn + O-2) = 10(-9.41 +/-0.03) exp[[(11.5 +/- 1.1) kJ mol(-1)/RT] cm(3) molecule(-1) s(-1) (error limits at the two standard deviation level). This result is in good agreement with previous data of Fontijn and Bajaj (J. Phys. Chem., 1996, 100, 7085), but about twice that of Zaslonko and Smirnov (Kinet. Catal., 1980, 21, 602). To examine the product channel of the Sn(P-3(o)) + O-2 reaction experimentally, O-atom ARAS measurements were performed. Two types of O-profiles were found, one reaching a peak around 40 mus and the other displaying a two-step increase, depending on the composition of the mixtures. When the reaction channel for forming O(P-3) atoms was assumed, numerical calculation was found to reproduce both these measured profiles, demonstrating that the main products are SnO(X(1)Sigma (+)) and atomic O(P-3).

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Documento generato il 07/04/20 alle ore 22:27:02