✦ LIBER ✦

The pyrolysis of acetylene-styrene mixtures between 450 and 550°C

✍ Scribed by C. Chanmugathas; Julian Heicklen

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 630 KB
Volume: 19
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550190708

No coin nor oath required. For personal study only.

✦ Synopsis

The pyrolysis of acetylene-etyrene mixtures has been studied from 450-550°C in a quartz reaction vessel in the absence and presence of 0, or NO. The rates of disappearance of reactants and formation of adducts are first-order in each reactant. The major product is polymer, with the adducts accounting for about 2.5% and 6.2% of the styrene removed at 450 and 550"C, respectively. The acetylene-to-styrene removal ratio is about 27 independent of temperature. The adducts formed a r e methyl indene and 1,2-dihydronaphthalene. These are about half-suppressed in the presence of O2 or NO.

The rate coefficients for reactant removal and adduct formation are: log{k{C2H,}, M -' s-'} = 7.53 2 0.10 -(90.6 2 1.5)/2.3RT log{k{CsH,}, M s-'} = 6.63 2 0.60 -(98.5 f 8.8)/2.3 R T log{k{CloHl,}, M-' s-'} = 8.27 2 0.66 -(143.3 ? 9.8)/2.3RT where the activation energies are in kJ/mol and the uncertainties are one standard deviation. As the reaction proceeds, the methyl indene and 1,2-dihydronaphthalene decompose, and indene and naphthalene are formed. In addition, an unidentified isomer of naphthalene is produced as an initial minor product, and it also decomposes as the reaction proceeds.

📜 SIMILAR VOLUMES

The pyrolysis of acetylene below 550°C

✍ Minkoff, G. J. ;Newitt, D. M. ;Rutledge, P. 📂 Article 📅 2007 🏛 Wiley (John Wiley & Sons) ⚖ 559 KB

## Abstract The polymerization of acetylene below 550° has been examined in a static system. For unpacked vessels it was found possible to obtain reproducible results, from which second‐order rate constants, and an activation energy of 46·7 | 2 kcal., have been obtained. The effect of a large numbe

Pyrolysis of acetylene-vinylacetylene mi

Pyrolysis of acetylene-vinylacetylene mixtures between 400 and 500°C

✍ Chellappah Chanmugathas; Julian Heicklen 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 559 KB

Acetylene and vinylacetylene mixtures were pyrolyzed at 400-500°C in the absence and presence of O2 or NO. The major product of the interaction between CzH2 and C4H4 is polymer, but benzene is also produced. Both the C2H2 removal and CsHs formation rates are first-order in C2Hz and C4H4. The rate co

Pyrolysis of 2-butyne/vinylacetylene mix

Pyrolysis of 2-butyne/vinylacetylene mixtures between 350 and 450°C

✍ Charles Harper; Julian Heicklen 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 523 KB

Vinylacetylene and 2-butyne mixtures were pyrolyzed a t 350-450°C in the absence and presence of 0, and NO. The major product of the reaction is a polymer, but o-xylene is also produced and was studied as the species of interest. The C,H,,i formation rate is first-order in C,H, and C,H,. The rate co

Pyrolysis of vinylacetylene between 300

Pyrolysis of vinylacetylene between 300 and 450°C

✍ Richard Lundgard; Julian Heicklen 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 1014 KB

Vinylacetylene was pyrolyzed at 300-450°C in a packed and an unpacked static reactor with a pinhole bleed to a quadrupole mass spectrometer. The reactant and C,H, products were monitored continuously during a reaction by mass spectrometry. In some runs, the products were also analyzed by gas chromat

Pyrolysis of Propyne/2-Methylbut-1-ene-3

Pyrolysis of Propyne/2-Methylbut-1-ene-3-yne mixtures between 350 and 450°C

✍ Charles Harper; Julian Heicklen 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 626 KB

2-Methylbut-1-ene-3-yne and Propyne mixtures were pyrolyzed at 350-450°C in the absence and presence of O2 and NO. The major product of the reaction is a polymer, but rn-xylene andp-xylene are also produced and were studied as the species of interest. The CsHIo formation rate is first-order in C3H4

Pyrolysis of 2-methylbut-1-ene-3-yne bet

Pyrolysis of 2-methylbut-1-ene-3-yne between 375 and 450°c

✍ C. Chanmugathas; Julian Heicklen 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 851 KB

The pyrolysis of 2-methylbut-l-ene-3-yne (C5H,) has been studied from 375 to 450°C in a quartz reaction vessel in the absence and presence of O2 or NO. From 375 to 425"C, the rates of disappearance of reactant and of formation of dimers are second order in C5H6. The major product is polymer, with th