Analysis of high molecular compounds in pyrolysis liquids from a german brown coal by FT-ICR-MS

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

“…2) of E 1 , E 2 , and E 3 contain ca. 2100, 1600, and 2100 peaks, respectively, including various BNCs [1,20,33]. From manual investigation of the observed peaks, it can be inferred that virtually all of the observed peaks are singly charged and therefore, the molecular masses (MMs) of detected compounds in E 1 -E 3 are within the range of 200-600 u.…”

“…Coals are heterogeneous mixtures of organic and inorganic matters [1]. Although heteroatoms, including nitrogen and sulfur, contribute a small portion to the mass of coals, the environmental pollution resulting from the heteroatoms is still an urgent problem [2,3].…”

Insight into the structural features of Zhaotong lignite using multiple techniques

“…Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS), which possesses ultrahigh resolving power (>300,000) and mass accuracy (<1 ppm), has been widely used to characterize oxygen-and nitrogen-containing compounds in complex mixtures, such as petroleum [19][20][21], coal-derived liquids [22][23][24][25][26][27], and bio-oils [28,29]. Rathsack et al [23] investigated molecular composition of the liquid products from pyrolysis of a German lignite using electrospray ionization (ESI) FT-ICR MS. Their results exhibit that compounds detected are dominated by O x (x = 1-12) species and possible structures were proposed based on double bond equivalent (DBE, i.e., rings plus double bonds). Shi et al [25][26][27] used ESI FT-ICR MS to analyze a middle-temperature coal tar.…”

Identification of basic nitrogen compounds in ethanol-soluble portion from Zhaotong lignite ethanolysis by positive-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

“…Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) proved to be a powerful technique for molecular characterization of extremely complex samples, such as petroleum [20][21][22][23], coal-derived liquids [24][25][26][27][28], pyrolysis bio-oils [29][30][31], and dissolved organic matter in waste water [32]. It has an ultrahigh broadband mass resolving power (exceeding 200,000) and mass accuracy (<1 ppm), allowing for baseline resolution of closely spaced isobaric species as well as distinct assignment of a unique elemental composition to each mass spectral peak.…”