Abstract
This chapter discusses the role of additives in α, ω-diarylalkane (DAA) degradation as a model reaction of coal liquefaction. Quite different roles between iron (Fe) and iron sulphide (FeS 2 ), molecular hydrogen and hydrogen donors are observed, and the relationship between the structures of DAAs and their reactivities for hydrocracking is revealed. 1-Benzylnaphthalene (1-BN) and di(1-naphthyl)methane (DNM) are synthesized by heating naphthalene with benzyl chloride and 1-chloromethylnaphthalene, respectively, in the presence of zinc powder. 1,2-Di(1-naphthyl)ethane (DNE) and 1,3-di(1-naphthyl)propane (DNP) are synthesized according to the methods of Buu–Hoi and Nishimura, respectively. The results of the reaction of diphenylmethane (DPM) under different reaction conditions are summarized in the chapter. DPM is very stable thermally.
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