Study on the Structure and Product Characteristics of Lignite Treated with Tetrahydronaphthalene, Water, and Their Mixture in a Bench-Scale Autoclave.

ACS Omega · 2025 · PMC12163857 · PMID 40521546

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an increasing trendno p-value reported

Furthermore, the content of fixed carbon and the carbon content in coal also show an increasing trend, which is mainly due to the removal of capillary and surface water in lignite.

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a decreasing trendno p-value reported

It should be emphasized that compared with the 5.55% hydrogen content of the upgraded coal sample corresponding to 250 °C, the hydrogen content of the lignite treated with individual THN showed a decreasing trend at 300 °C, which was only 5.21%.

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