Thermal decomposition of jet fuel model compounds under near-critical and supercritical conditions. 2. Decalin and Tetralin

Thermal decomposition of two jet fuel model compounds, Decalin and Tetralin , was studied under near-critical and supercritical conditions. Under high- pressure supercritical conditions, the thermal decomposition of both compou nds was dominated by isomerization reactions. This is different from the re sults obtained under low-pressure and high-temperature conditions where cra cking reactions (for Decalin) or dehydrogenation reactions (for Tetralin) d ominate. The major liquid products from Decalin were spiro[4,5]decane, 1-bu tylcyclohexene, 1-methylcyclohexene, 1-methylhydrindan, two octalins, and t oluene. The cis-decalin was converted to trans-decalin as the reaction proc eeded. The main liquid products from Tetralin were 1-methylindan and naphth alene with the former being the dominant product that was favored at high p ressures.