Investigation on structural features of Shengli lignite through oxidation under mild conditions

Liu, Fang-Jing; Wei, Xian‐Yong; Zhu, Ying; Gui, Juan; Wang, Yugao; Fan, Xing; Zhao, Yun‐Peng; Zong, Zhi‐Min; Zhao, Wei

doi:10.1016/j.fuel.2013.01.020

Cited by 112 publications

(80 citation statements)

References 32 publications

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“…The oxidation of lignite may play an important role in improving of SSA and microporosity and the amount of ion exchange in catalyst preparation. Potassium permanganate, peroxyacetic acid, sodium hypochlorite, oxygen and hydrogen peroxide were used for increasing OCSs content [14][15][16][17][18][19][20], especially for environmentally friendly oxidant of hydrogen peroxide [21,22]. The ion exchange capacity of the lignite can be enhanced by oxidation treatment to provide the carboxyl group.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Ren

Cao

Zhao

et al. 2017

Fuel

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Section: Introductionmentioning

confidence: 99%

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Ren

Cao

Zhao

et al. 2017

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“…On the other hand, many heteroatom-containing organic compounds, including the BNCs, in coals are valuable chemicals for synthesizing pharmaceutical and agrochemical intermediates [9,10]. Hence, a full understanding of the molecular compositions of BNCs in coals not only has profound implications for removing nitrogen from coals but also for obtaining value-added chemicals from coals [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of extractable basic nitrogen compounds in Buliangou subbituminous coal by positive-ion ESI FT-ICR MS

Kong

Wei

Yan

et al. 2015

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“…Mild oxidation has proved to be an effective approach for providing insights into the macromolecular network structures of coals and producing value‐added chemicals, such as alkanoic acids (AAs), alkanedioic acids (ADAs), and BPCAs (Miura et al, ; Murata et al, ; Huang et al, ; Yao et al, ; Liu et al, ,, ; Lv et al, ). The molecular structures of these carboxylic acids can be determined by GC/MS after esterification with different methods (Murata et al, ; Yao et al, ; Pan et al, ; Lv et al, ; Liu et al, ).…”

Section: Small‐molecular Chemicals In Cdls Identified By Gc/msmentioning

confidence: 99%

“…GC/MS analysis shows that the distributions of carboxylic acids from different coal oxidation methods are quite different. For aliphatic acids, the products from RICO of coals are usually rich in AAs and ADAs having wide range of carbon numbers (C 2 to C 34 for AAs and C 4 to C 29 for ADAs) (Murata et al, , ; Artok et al, ; Kidena et al, ; Huang et al, ; Yao et al, ), whereas coal oxidation with NaOCl produces abundant short‐chain AAs (most with chloro‐substituents) and short‐chain ADAs (Yao et al, ; Liu et al, ,). H 2 O 2 only shows high reactivity towards low‐rank coals and short‐chain ADAs like malonic acid and succinic acid are usually the major carboxylic acids resulting from oxidation in H 2 O 2 aqueous solution (Pan et al, ; Doskočil et al, ; Liu et al, ).…”

Section: Small‐molecular Chemicals In Cdls Identified By Gc/msmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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Coal-derived liquids (CDLs) are primarily generated from pyrolysis, carbonization, gasification, direct liquefaction, low-temperature extraction, thermal dissolution, and mild oxidation. CDLs are important feedstocks for producing value-added chemicals and clean liquid fuels as well as high performance carbon materials. Accordingly, the compositional characterization of chemicals in CDLs at the molecular level with advanced analytical techniques is significant for the efficient utilization of CDLs. Although reviews on advancements have been rarely reported, great progress has been achieved in this area by using gas chromatography/mass spectrometry (GC/MS), two-dimensional GC-time of flight mass spectrometry (GC × GC-TOFMS), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). This review focuses on characterizing hydrocarbon, oxygen-containing, nitrogen-containing, sulfur-containing, and halogen-containing chemicals in various CDLs with these three mass spectrometry techniques. Small molecular (< 500 u), volatile and semi-volatile, and less polar chemicals in CDLs have been identified with GC/MS and GC × GC-TOFMS. By equipped with two-dimensional GC, GC × GC-TOFMS can achieve a clearly chromatographic separation of complex chemicals in CDLs without prior fractionation, and thus can overcome the disadvantages of co-elution and serious peak overlap in GC/MS analysis, providing much more compositional information. With ultrahigh resolving power and mass accuracy, FT-ICR MS reveals a huge number of compositionally distinct compounds assigned to various chemical classes in CDLs. It shows excellent performance in resolving and characterizing higher-molecular, less volatile, and polar chemicals that cannot be detected by GC/MS and GC × GC-TOFMS. The application of GC × GC-TOFMS and FT-ICR MS to chemical characterization of CDLs is not as prevalent as that of petroleum and largely remains to be developed in many respects. © 2016 Wiley Periodicals, Inc. Mass Spec Rev 36:543-579, 2017.

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Investigation on structural features of Shengli lignite through oxidation under mild conditions

Cited by 112 publications

References 32 publications

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Analysis of extractable basic nitrogen compounds in Buliangou subbituminous coal by positive-ion ESI FT-ICR MS

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

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