Insight into the structural features of Zhaotong lignite using multiple techniques

Li, Zhan-Ku; Wei, Xian‐Yong; Yan, Hong-Lei; Zong, Zhi‐Min

doi:10.1016/j.fuel.2015.02.117

Cited by 205 publications

(77 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ESI FT‐ICR MS has been successfully used for characterizing NCCs in the extracts from low‐temperature extraction (Wu et al, , ; Castro‐Marcano et al, ; Kong et al, ) and thermal dissolution of coals (Li et al, ,d), as shown in Table . Wu et al () reported that class species resolved by negative‐ion ESI FT‐ICR MS in the pyridine extract from Pocahontas No.…”

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

“…Thus, characterizing those NCCs in thermal extracts is necessary. Li et al () characterized basic and neutral NCCs in the thermal extract from Zhaotong lignite ethanolysis with positive‐ and negative‐ion ESI FT‐ICR MS, respectively. Basic NCCs primarily consist of the N 1 , N 1 O 1 ‐ N 1 O 5 , N 2 , and N 2 O 1 ‐ N 2 O 2 class species, with the N 1 and N 1 O 1 ‐ N 1 O 5 classes dominant in relative abundance (accounting for 69% of all assigned classes) (Li et al, ).…”

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

“…) which could be assigned to alkylamines with or without oxygen‐functional groups. Negative‐ion ESI FT‐ICR MS analysis reveals neutral NCCs in the extract, including the N 1 and N 1 O 1 ‐ N 1 O 4 class species with 3–13 DBE values (Li et al, ). The core units for neutral NCCs are considered to be N ‐heterocyclic aromatics with 1–4 rings from pyrrole to benzocarbazole.…”

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

See 2 more Smart Citations

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

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

Section: Class Chemicals Revealed By Ft‐icr Ms In Cdlsmentioning

confidence: 99%

See 1 more Smart Citation

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

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

Self Cite

View full text Add to dashboard Cite

show abstract

“…Schobert 12 pointed out that low-rank coal was characterized by low aromaticities (with the fraction of aromatic carbon f a ranging between 0.5 and 0.75), abundant aliphatic and hydroaromatic carbon and hydrogen, and high oxygen contents (may reach 25%). Wei et al 13 found that Zhaotong lignite mainly consisted of aliphatic (52.3%) and aromatic (42.2%) carbons. Ethylene was the most abundant structure among the aliphatic carbons, and each aromatic cluster contained two rings on average according to 13 Dakota, and Cuba, AL with nitric acid, respectively, and they found that the pretreatment increased liquefaction percentages.…”

Section: Introductionmentioning

confidence: 99%

“…Wei et al 13 found that Zhaotong lignite mainly consisted of aliphatic (52.3%) and aromatic (42.2%) carbons. Ethylene was the most abundant structure among the aliphatic carbons, and each aromatic cluster contained two rings on average according to 13 Dakota, and Cuba, AL with nitric acid, respectively, and they found that the pretreatment increased liquefaction percentages. 5,15−17 However, the reason behind the improvement remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Macromolecular Structural Unit Construction of Fushun Nitric-Acid-Oxidized Coal

Shi

Gui²,

Tao³

et al. 2015

Energy Fuels

View full text Add to dashboard Cite

Biological liquefaction of nitric-acid-oxidized low-rank coal is well-documented in the literature. However, few studies focused on the macromolecular structure of nitric-acid-oxidized low-rank coal. In this paper, Fushun nitric-acid-oxidized coal was first analyzed by Fourier transform infrared spectroscopy (FTIR) and 13 C nuclear magnetic resonance (NMR) spectra to investigate its elemental composition and organic functional groups. Then, the coal macromolecular structural parameters were calculated, and its structural unit was constructed. The results showed that the Fushun nitric-acid-oxidized coal structural unit had a molecular formula of C 192 H 161 N 9 O 39 . Carbon existed in the form of carboxyl and alkyl with 1−3 carbon atoms, besides aryl. Oxygen existed in the form of carboxyl, carbonyl, and phenolic groups, ether bond, etc. Nitrogen existed in the form of nitryl, amide, etc. The hydrogen aromaticity, length of the side chain, ratio of aromatic carbon, and ratio of phenolic carbon were 0.086, 0.567, 0.543, and 0.114, respectively.

show abstract

Energy and Chemicals Production from Coal‐based Technologies: A Review

et al. 2023

View full text Add to dashboard Cite

Coal, a solid fossil fuel, consists of organic and inorganic matter. Its complex structure contains fused aromatic moieties, constituting a three‐dimensional macromolecular coal structure network. More efficient utilisation technologies are required to ensure coal becomes a considerably cleaner source of energy in the future. Due to the increase in energy, liquid fuels, and combustible gas demands, coal utilisation is necessary for some developing countries such as Pakistan, Turkey, and India. Furthermore, coal is globally being used to produce liquid fuels and combustible gases. The benefits and drawbacks of various Fischer‐Tropsch synthesis catalysts are discussed. For clean coal carbonisation, blends of coal and biomass, which are the current trends in decarbonising the coal industries, should be adopted and the chemistry of coal carbonisation should be investigated further, especially the phenomenon that occurs at the plastic layer (300–550 °C). In addition, the clean co‐gasification technology presented in this work could be adopted and successfully implemented through government and industry initiatives to study and test coal/biomass for co‐gasification and advanced modelling and simulation of the co‐gasification plant.

show abstract

Insight into the structural features of Zhaotong lignite using multiple techniques

Cited by 205 publications

References 39 publications

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

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

Macromolecular Structural Unit Construction of Fushun Nitric-Acid-Oxidized Coal

Energy and Chemicals Production from Coal‐based Technologies: A Review

Contact Info

Product

Resources

About