Parabenzoquinone pyrolysis and oxidation in a flow reactor

✍ Scribed by Maria U. Alzueta; Miriam Oliva; Peter Glarborg

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 340 KB
• Volume: 30
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/(sici)1097-4601(1998)30:9<683::aid-kin9>3.0.co;2-o

✦ Synopsis

An experimental and theoretical study of the pyrolysis and oxidation of parabenzoquinone has been performed. The experiments were conducted in an isothermal quartz flow reactor at atmospheric pressure in the temperature range

The main variables 600-1500 K. considered are temperature, oxygen concentration, and presence of CO. A detailed reaction mechanism for the pyrolysis and oxidation chemistry of parabenzoquinone is proposed, which provides a good description of the experimental results. Both the experimental work and the kinetic mechanism proposed for the pyrolysis and oxidation of parabenzoquinone represent the first systematic study carried out for this important aromatic compound.

Our pyrolysis results confirm that the primary dissociation channel for p-benzoquinone leads to CO and a C 5 H 4 O isomer, presumably cyclopentadienone. However, significant formation of CO 2 during the pyrolysis may indicate the existence of a secondary dissociation channel leading to CO 2 and a C 5 H 4 isomer. Under oxidizing conditions, consumption of pbenzoquinone occurs mainly by dissociation at lower temperatures. As the temperature increases interaction of OC 6 H 4 O with the radical pool becomes more significant, occurring primarily through hydrogen abstraction reactions followed by ring opening reactions of the OC 6 H 3 O radical.