We'll not provide excerpts from this study, but we invite you to explore it. Although the report is published and maintained by our own National Energy Technology Laboratory, the four researchers who performed the research are from four separate entities, two universities and two corporations, in South Korea.
In sum, the researchers discovered that, when they combined Alaskan sub-bituminous coal with used auto tire waste, and some other, unspecified, plastics, in the presence of tetralin, the coal conversion catalyst specified by West Virginia University, the tire wastes helped contribute hydrogen to the coal, and hydrocarbon liquid production increased by more than 20% over coal converted alone.