Energy & Fuels 1994,8, 498-506
498
Aqueous High-Temperature Chemistry of Carbo- and Heterocycles. 21.l Reactions of Sulfur-Containing Compounds in Supercritical Water at 460 "C Alan R. Katritzky,' Richard A. Barcock, Marudai Balasubramanian, and John V. Greenhill Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 3261 1-2046
Michael Siskin* and William N. Olmstead Corporate Research, Exxon Research and Engineering Company, Annandale, New Jersey, 08801 Received September 8, 1993. Revised Manuscript Received December 1, 1 9 9 P
Ten sulfur-containing compounds were selected to serve as models for the sulfur-containing impurities in heavy oils. They were subjected to aquathermolysis in water, 15% aqueous formic acid, and 15% aqueous sodium formate solution for 7 min at 460 "C. Refractory materials were rerun over 1h at the same temperature. In each instance the sulfur compound was exposed to the same timehemperatwe regime in cyclohexane in order to compare any thermal decomposition with the aqueous results. Thiophene (5) was completely unchanged, and benzo[b]thiophene (33) showed little (
