Catalytic hydroconversion of the light residue from Yinggemajianfeng lignite over a solid superacid

Wu, Zi-Fan; Wei, Xian‐Yong; Mo, Wen‐Long; Kang, Yu-Hong; Zhang, Xiaoqi; Shan, Xian-Kang; Liu, Guanghui; Fan, Xing

doi:10.1016/j.fuel.2021.122470

Cited by 6 publications

(7 citation statements)

References 28 publications

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“…The predominant products from the catalytic hydroconversion are oxygen-containing organic compounds, especially 4methylpent-3-en-2-one and 4-hydroxy-4-methylpentan-2-one, suggesting that the cleavage of >C α -O β -and >C β -O α -bonds in the light insoluble portion significantly proceeded during the CHC. 86 Oxygen-containing organic compounds are also predominant from the CHC of an alkali lignin over Ni/Hβ. 87 Nickel supported on solid acids proved to be the bifunctional catalyst for the CHC of heavy carbon resources to cyclanes.…”

Section: The Roles Of H + and H•••h In The Chc Of Heavy Carbon Resourcesmentioning

confidence: 99%

“…57,58,88,160 The insoluble portion can be ultrasonically isolated to a light insoluble portion and a heavy insoluble portion in carbon tetrachloride according to the density difference. 86 The catalytically hydroconverted light insoluble portion can be relatively easily separated from the catalyst by the density difference, and adding a magnetic core into the catalyst further facilitates recovering the catalyst. 83,119,[131][132][133][134][135]161 In addition, ultrasonically extracting a solid sample, e.g., a coal sample, significantly reduced the size of the sample particles, 150 facilitating the CHC.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…As a result, the yield of soluble portion from the CHC is 60.0%, while the yield (1.8%) of soluble portion from the NCHC is negligible. The predominant products from the catalytic hydroconversion are oxygen-containing organic compounds, especially 4-methylpent-3-en-2-one and 4-hydroxy-4-methylpentan-2-one, suggesting that the cleavage of >C α -O β - and >C β -O α - bonds in the light insoluble portion significantly proceeded during the CHC . Oxygen-containing organic compounds are also predominant from the CHC of an alkali lignin over Ni/Hβ …”

Section: The Roles Of H+ and H···h In The Chc Of Heavy Carbon Resourcesmentioning

confidence: 99%

“…MS proved to be a powerful solvent for effectively extracting the soluble organic species from the macromolecular networks under ultrasonic irradiation. ,, As a result, the organic matter in heavy carbon resources can be isolated into soluble portion and insoluble portion. A number of organic compounds were significantly enriched and even separated as pure compounds by subsequent fine separations, including fractional extraction, gradient column chromatography, and sequential crystallization from the soluble portion. − Alternatively, the soluble portion can be converted to alkanes as well as nonsubstituted and alkyl-substituted cyclanes under pressurized H 2 over Ni-loading catalysts. ,,, The insoluble portion can be ultrasonically isolated to a light insoluble portion and a heavy insoluble portion in carbon tetrachloride according to the density difference . The catalytically hydroconverted light insoluble portion can be relatively easily separated from the catalyst by the density difference, and adding a magnetic core into the catalyst further facilitates recovering the catalyst. ,,− , In addition, ultrasonically extracting a solid sample, e.g., a coal sample, significantly reduced the size of the sample particles, facilitating the CHC.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

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Advances in Catalytic Hydroconversion of Typical Heavy Carbon Resources under Mild Conditions

Wei

Bai

et al. 2023

Energy Fuels

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Low-rank coals, biomass, and heavy petroleum are typical heavy carbon resources, which are currently not efficiently used, and many processes for the current use of the heavy carbon resources cause severe environmental pollution with very limited economic benefits even with a great deficit. Efficiently using the heavy carbon resources can greatly improve the environment and create huge economic benefits. The main difficulty in efficiently using the heavy carbon resources is the high content of aromatic rings (ARs) and heteroatoms in addition to the insoluble and complex macromolecular structures of the heavy carbon resources. Catalytic hydroconversion (CHC) includes catalytic hydrocracking and subsequent catalytic hydrofining. Many low-rank coals consist of macromolecular species, which are rich in bridged linkages connecting structural units, especially ARs, on which side chains are usually contained. Many ARs, bridged linkages, and side chains contain heteroatoms. Over a proper active catalyst, many bridged linkages and even some side chains can be cleaved, and many heteroatoms outside the ARs can be removed by the CHC under mild conditions to get soluble portions with relatively simple composition, facilitating subsequent separation to obtain pure chemicals, especially value-added products, such as condensed aromatics. The remaining economically inseparable species can be converted to liquid chemicals, especially nonsubstituted and alkyl-substituted cyclanes, by subsequent catalytic hydrofining. Catalysts and catalytically formed active hydrogen play crucial roles in the processes. Mainly based on our investigations, the related advances are reviewed in this work.

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Section: The Roles Of H + and H•••h In The Chc Of Heavy Carbon Resourcesmentioning

confidence: 99%

Section: Challenges and Perspectivesmentioning

confidence: 99%

Section: The Roles Of H+ and H···h In The Chc Of Heavy Carbon Resourcesmentioning

confidence: 99%

Section: Challenges and Perspectivesmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Catalytic Hydroconversion of Typical Heavy Carbon Resources under Mild Conditions

Wei

Bai

et al. 2023

Energy Fuels

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“…In our group, light residue from Yinggema lignite was subjected to thermal dissolution with cyclohexane as the solvent at 160 o C under 4 MPa [21]. However, the infrared characteristics, thermal behavior and pyrolysis products distribution of the light residue were not investigated.…”

Section: Introductionmentioning

confidence: 99%

Composition and structure characteristics and pyrolysis products distribution of light residue from Yinggema lignite

2022

Preprint

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Yinggema lignite (YL) was extracted with isometric acetone/carbon disulfide mixed solvent at room temperature under ultrasonication to remove the soluble organic matter and obtain the extract residue (RYL), and then RYL was separated by density difference with carbon tetrachloride under ultrasonication to obtain the light residue (LRYL). Composition and structure characteristics and pyrolysis products distribution of YL and LRYL were analyzed by Thermogravimetry-Fourier transform infrared spectrometer-Gas chromatography/mass spectrometer (TG-FTIR-GC/MS).

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Porous hollow nanospheres nickel phosphide and its high catalytic hydrogenation performance on naomaohu coal soluble portion and model compounds

Zhang,

Liu,

Tang

et al. 2024

Fuel

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Catalytic hydroconversion of the light residue from Yinggemajianfeng lignite over a solid superacid

Cited by 6 publications

References 28 publications

Advances in Catalytic Hydroconversion of Typical Heavy Carbon Resources under Mild Conditions

Advances in Catalytic Hydroconversion of Typical Heavy Carbon Resources under Mild Conditions

Composition and structure characteristics and pyrolysis products distribution of light residue from Yinggema lignite

Porous hollow nanospheres nickel phosphide and its high catalytic hydrogenation performance on naomaohu coal soluble portion and model compounds

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