Health & Environmental Research Online (HERO)


Print Feedback Export to File
8436742 
Journal Article 
Structural Group Analysis of Products from Two-Stage Liquefaction of Highvale Goal 
Eglebor, NO; Jacobson, JM; Gray, MR; Lee, LK 
1989 
7 
3 
251-279 
English 
Products from liquefaction of Highvale Coal (Alberta, subbitumlnous) in anthracene oil and recycled product, with iron oxide catalyst, were studied using a structural group analysis method. The various functional groups were determined using a combination of proton NMR. carbon-13 NMR, IR, elemental analysis and nitrogen titration analysis. The liquefaction reactions in anthracene oil and in recycled product oil were compared on the basis of three solvent quality indices and the predominant structural groups in the resulting liquids. The results show that major structural changes occur at both stages of liquefaction. Processing in anthracene oil showed much greater structural changes than liquefaction in the recycled product. The structural profiles indicated a reduction in aromatic structures and a dramatic increase in aliphatic and naphthenic structures during processing in anthracene oil. These changes were attributed to the hydrogenation of aromatic structures and the dissolution of aliphatic and naphthenic compounds. Liquefaction in recycled product showed less significant changes in structural composition but resulted in a better quality product in terms of the amount of distillable oils, transferable protons and hydrogen to carbon ratio. This improvement was attributed to the improved availability of donatable hydrogen in the recycled product. © 1989, Taylor & Francis Group, LLC. All rights reserved.