Abstract
The mass range and the number-average molecular weight of coal-derived liquids upgraded with various catalysts were determined by field-ionization mass spectrometry (FIMS). The differences in the main components in liquids upgraded with HDS (hydrodesulphurization) and zeolite catalysts were clarified. Upgraded coal-derived liquids hydrogenated and deoxygenated with HDS catalysts contain alkyl-tetralins or indans as the main component. On the other hand, coal-derived liquids upgraded with zeolite catalysts and without catalyst contain alkyl-naphthalenes and/or alkyl-tetralins (or indans) and/or alkyl-phenols as the main component.
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