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Liuhuanggou bituminous coal (LBC) and its extraction residue (ER) were thermally dissolved sequentially in cyclohexane, toluene, and ethanol at 300 °C to obtain soluble portions (SPs) 1–3 (SP1-SP3) from the thermal dissolution (TD) In the total yield (TY) of 10.4% and SPs I-III (SPI-SPIII) from the TD in the TY of 4.9%, respectively. The SPs were analyzed by multiple analytical tools, including gas chromatograph/mass spectrometer (GC/MS), quadrupole exactive orbitrap mass spectrometer (QEOTMS), and Fourier transform infrared spectrometer. The analysis with GC/MS shows that normal alkanes are the most abundant in SPI, while arenes are predominant in SP1, SP2, and SPII. According to the analysis with QEOTMS, abundant heteroatom-containing organic species were concentrated into SP3 and SPIII with molecular masses of 150–750 u. The relative contents of N1 and N1O1 species are predominantly high in SPIII and SP3, respectively.

In this study, the effects of heating rate and ash content on the pyrolysis kinetic characteristics of ZhaoTong lignite were investigated by using thermogravimetric analysis (TGA) method. The non-i...

The selective hydrodeoxygenation (HDO) of lignin-derived bio-oil still meets the great challenges due to its complex oxygenated organic component. In this research, first time, Pd-based zeolite catalysts were prepared by the modified deposition-precipitation (DP) method for the HDO conversion of guaiacol. Notably, for the same Si/Al ratio of zeolite, Pd2%/Hβ catalyst showed the higher catalytic activity on the HDO of guaiacol than that Pd2%/M and Pd2%/HZSM-5 catalyst, which mainly originated from the synergetic effect between metal nanoparticles size and acid sites of catalyst. As one of typical phenolic monomers, guaiacol can be converted into high yield of hydrocarbons under the condition of 220 °C, 3 MPa H2, and 4 h in n-hexane over Pd2%/Hβ (DP) catalyst. This highly active catalyst exhibited the good recyclability in the HDO conversion of guaiacol. In addition, other typical phenolic monomers can be converted into high yield of hydrocarbons over this highly active catalyst. Considering this, after HDO upgrading, real lignin oil (RLO) can be converted into high yield of hydrocarbons with the carbon number (CN) in range of C7-C15. This work highlighted that the depolymerization monomers from lignin can be further upgraded by this high active catalyst through HDO to obtain jet hydrocarbons fuel.

A middle/low-temperature coal tar from Northern Shaanxi Province (M/LTCTNSP) was extracted with petroleum ether, and the resulting extract was analyzed by three mass spectrometers. The main group components detected by gas chromatograph/mass spectrometer (GC/MS) are aliphatics, arenes, oxygen-containing organic compounds (OCOCs), and nitrogen-containing organic compounds (NCOCs). In total, nearly 1000 aliphatics, arenes, OCOCs (mainly O1 and O2), NCOCs and sulfur-containing organnic compouds (SCOCs) were detected by the two-dimensional gas chromatography/time-of-flight mass spectrometer (GC×GC/TOF-MS). The relative abundances (RAs) of NCOCs, OCOCs, and SCOCs detected by ESI Orbitrap-mass spectrometry in the positive ion mode are 80.8%, 16.1%, and 3.1%, While in the negative ion mode, the RAs of OCOCs and NCOCs are 85.6%, and 14.4%, respectively. The condensation degree of aromatics and existing forms of heteroatoms were also examined.

An acidic ionic liquid modified microfiber attapulgite (MFA)-supported nickel was prepared by thermally decomposing nickel tetracarbonyl onto MFA modified with an acidic ion liquid (AIL, 1-sulfobutyl-3-methylimidazolium trifluoromethanesulfonate). It was characterized with multiple instruments and used for catalyzing hydroconversion of coal-related model compounds (CRMCs) di(1-naphthyl)methane, diphenylmethane, bibenzyl, and 1,3-diphenylpropane. The results indicate that Ni/MFA@AIL effectively catalyzes hydroconversion of the CRMCs to afford cyclanes and alkylcyclanes by inducing the formation of H + , H − , and biatomic active hydrogen species.