Role of iron catalysts on hydroconversion of aromatic hydrocarbons
- Univ. of Tokyo (Japan); and others
Hydroconversion of aromatics and arylalkanes as a model reaction of coal liquefaction and heavy petroleum residue degradation was carried out in the absence or presence of metallic iron (Fe) and pyrite (FeS{sub 2}). Thermolysis of some diarylalkanes proceeded slowly by the radical chain reaction. The reaction rate was reduced by the addition of hydrogen-donor solvents and was slightly accelerated in the presence of hydrogen molecules. Fe accelerated the hydrogenation of aromatic-rings. FeS{sub 2} promoted the C{sub ar}-C{sub alk} bond cleavage of diarylmethanes only, and promoted the hydrogenation of diarylethanes and diarylpropanes. The C-C bond cleavage of arylalkanes was related to the hydrogen-accepting ability, C-C bond dissociation energy and resonance energy of the species after C-C bond scission. Oxidation of pyrite and its catalysis were also investigated. It was found that the catalytic activity of pyrites on the hydrogenation of 1-methylnaphthalene and hydrocracking of 1-[4-(2-phenylethyl)benzyl]naphthalene decreased with oxidation under air, and the deactivated pyrite was reactivated by addition of sulfur to the reaction system.
- OSTI ID:
- 214783
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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Role of iron catalyst on hydroconversion of aromatic hydrocarbons