Kinetic studies of thermal decomposition of sugarcane bagasse and cassava bagasse

2016 ◽  
Vol 125 (1) ◽  
pp. 437-445 ◽  
Author(s):  
Elciane Regina Zanatta ◽  
Thiago Olinek Reinehr ◽  
Jamal Adb Awadallak ◽  
Sirlei Jaiana Kleinübing ◽  
João Batista Oliveira dos Santos ◽  
...  
2020 ◽  
Vol 689 ◽  
pp. 178610 ◽  
Author(s):  
Jeanina Pandele Cusu ◽  
Adina Magdalena Musuc ◽  
Dumitru Oancea

Mycologia ◽  
2020 ◽  
Vol 112 (4) ◽  
pp. 663-676
Author(s):  
Gabriela Verónica Díaz ◽  
Romina Olga Coniglio ◽  
Adriana Elizabet Alvarenga ◽  
Pedro Darío Zapata ◽  
Laura Lidia Villalba ◽  
...  

Chlorine oxide radicals, ClO( 2 II , v " = 0) were obtained as a product of (a) the rapid reaction of Cl with chlorine dioxide at 300°K, Cl + OClO → ClO + ClO, (1) (b) the initiated thermal decomposition of OClO above 320°K, (c) the rapid reaction of Cl with ozone at 300°K, Cl + O 3 → ClO + O 2 . Bromine oxide radicals, BrO ( 2 II , v " = 0), have also been detected in the reaction of bromine atoms with ozone. The decay reaction of ClO radicals was second order in [ClO] at all temperatures studied (294 to 495°K). The decay of [ClO] in the presence of chlorine atom scavengers (H 2 , Br 2 , OClO) has also been studied. The direct reactions of ClO with H 2 (7), and with O 3 (9), were undetectably slow, with k 7 < 10 8.5 and k 9 < 10 9.5 cm 3 mole -1 s -1 at 294°K. The recombination of two ClO radicals probably takes place through a mechanism involving small concentrations of atomic chlorine and the short-lived, ClOO peroxy radical, ClO + ClO → k 2 C1 + ClOO, (2) ClOO + Cl → Cl 2 ( 1 ∑ + g , 3 II Ou+ + O 2 , (3) ClOO + M → Cl + O 2 + M . (4) Rate measurements gave k 2 = (7 ± 2) x 10 11 exp [(— 2500 ± 300)/ RT ] cm 3 mole -1 s -1 from 294 to 495°K. The present values for k 2 are compared with those found previously.


2015 ◽  
Vol 83 ◽  
pp. 850-858 ◽  
Author(s):  
Sachin Kumar ◽  
Pratibha Dheeran ◽  
Surendra P. Singh ◽  
Indra M. Mishra ◽  
Dilip K. Adhikari

1984 ◽  
Vol 62 (4) ◽  
pp. 712-715 ◽  
Author(s):  
Neil Burford ◽  
Tristram Chivers ◽  
Richard T. Oakley ◽  
Tom Oswald

The oxidative addition of Cl2 (using SO2Cl2) to the six-membered ring (R2PN)(SN)2 (R = Me, Ph) produces the mixed phosphazene–thiazyl heterocycles, (R2PN)(NSCl)2, which react with Me3SiNSNSiMe3 to give the bicyclic compounds R2PS3N5. The latter undergo thermal decomposition, at ca. 100 °C in toluene, via reductive elimination of an NSN unit to regenerate (R2PN)(SN)2 in high yield. Kinetic measurements of this process, using 31P nmr spectroscopy, yield an activation energy of 102.4 ± 6.0 kJ mol−1 for the release of the NSN fragment from Me2PS3N5. The thermolysis route has been used to prepare the thermally unstable (F2PN)(SN)2, characterized as a 1:1 adduct with norbornadiene.


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