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Extracts of liquefaction residue from Shenmu–Fugu subbituminous coal (LRSFSBC) were obtained by sequential extraction with petroleum ether, methanol, and carbon disulfide. They were analyzed using a Fourier transform infrared (FTIR) spectrometer and a positive-ion (PI) electrospray ionization Fourier transform ion cyclotron resonance mass spectrometer (ESI FT-ICR MS). In total, 65.37% of LRSFSBC was...
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