𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Kinetics of the thermal decomposition of pyridine in a flow system

✍ Scribed by Thomas J. Houser; Michael E. McCarville; Tesfaye Biftu

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
659 KB
Volume
12
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The kinetics of the pyrolysis of pyridine was studied in the temperature range of 875–1050°C, at 1 atm total pressure, in a Vycor stirred‐flow reactor. Initial concentrations ranged from 0.25 to 2 mol % in helium and reaction times from 0.25 to 4 sec. It was found at the lower temperatures that the reaction was mixed first and second order. At the higher temperatures an autocatalytic term, zero order in the substrate and first order in the concentration of pyridine decomposed, was necessary in addition to the other two terms to describe the kinetic data. Most of the product was in the form of a primarily aromatic, nonvolatile tar; the major volatile products were HCN and C~2~H~2~. An increase in the surface‐to‐volume ratio of the reactor decreased the rate, indicating a radical chain or sequential reaction with radical consumption on the surface. Experiments with additives showed that C~2~H~2~ increased the rate. Using the kinetic and product data, some mechanistic considerations are discussed, and a mechanism is proposed to account for the first‐order term.

📜 SIMILAR VOLUMES

Thermal decomposition of hexamethylethan
Thermal decomposition of hexamethylethane in a flow system
✍ James A. Walker; Wing Tsang 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 733 KB

## Abstract Hexamethylethane has been decomposed in a flow system in the temperature range of 700–900 K. The mechanism involves carbon–carbon bond cleavage at the most highly substituted position and rapid formation of isobutene from the __t__‐butyl radical. The rate expression is and is complete

Thermal decomposition of biphenyl and na
Thermal decomposition of biphenyl and naphthalene in a flow system
✍ J. Lahaye; H.B. Palmer; R.K. Sharma 📂 Article 📅 1968 🏛 Elsevier Science 🌐 English ⚖ 159 KB

THIS note briefly reports some experiments on the pyrolysis of biphenyl and naphthalene, using a hot flow reactor of the type used in some previous studies of hydrocarbon decomposition."-8) As there is little literature on the decomposition of biphenyl(4) or naphthalene,(s\* 6) in the gas phase, it

The kinetics of the thermal decompositio
The kinetics of the thermal decomposition of F2O
✍ J. Czarnowski; H.J. Schumacher 📂 Article 📅 1972 🏛 Elsevier Science 🌐 English ⚖ 433 KB

The thermal decomposition of F20 has ken investigated in reactors of hfg, Al and quartz usini: a &tic method. The temperature was varied between 501 and 583°K and the total pressure between 10 and 750 torr. The reaction is homogweous and at moderate and high pressures essentially of second o&i. In

Kinetics of thermal gas-phase decomposit
Kinetics of thermal gas-phase decomposition of 2-bromopropene using static system
✍ Jan Nisar; Iftikhar A. Awan 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 197 KB 👁 1 views

## Abstract The gas phase elimination kinetics of 2‐bromopropene was studied over the temperature range of 571–654 K and pressure range of 12–46 Torr using the seasoned static reaction system. Propyne was the only olefinic product formed and accounted for >98% of the reaction. This product was form

Kinetics of hydrazine decomposition in a
Kinetics of hydrazine decomposition in a laminar non-isothermal flow
✍ M. Gilbert 📂 Article 📅 1958 🏛 Elsevier Science 🌐 English ⚖ 448 KB

The experimental results on the decomposition of hydrazine are re-examined. The assumption is made that a dilute hydrazine toluene .gas mixture at low pressure will not undergo isothermal reaction under the flow conditions experienced in the apparatus axed by Szwarc, bat that there will be a strong