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首页> 美国政府科技报告 >Consequences of the Mass Spectrometric and Infrared Analysis of Oils and Asphaltenes for the Chemistry of Coal Liquefaction. Characterization of Coal-Derived Liquids and Other Fossil Fuel Related Materials Employing Mass Spectrome
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Consequences of the Mass Spectrometric and Infrared Analysis of Oils and Asphaltenes for the Chemistry of Coal Liquefaction. Characterization of Coal-Derived Liquids and Other Fossil Fuel Related Materials Employing Mass Spectrome

机译：用于煤液化化学的油和沥青质的质谱和红外分析的后果。用质谱法表征煤衍生液体和其他化石燃料相关材料

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A COED liquid was separated into oils, asphaltenes, and residue. Anion- and cation-exchange chromatography fractionated the oils and asphaltenes into acids, bases, and neutrals; silica-gel chromatography separated neutral fractions into saturate and aromatic concentrates. Infrared spectra of the aromatic concentrates identified functional groups. Carbon-number distributions for the aromatic concentrates were obtained using high- and low-resolution FI/MS and high-resolution 70-eV EI/MS and ultra high-resolution low-voltage EI/MS. Excellent agreement exists between the MS analyses. The asphaltenes contain higher molecular weight Z series, higher molecular weight homologs and different compound types than do the oils. However, compound types are observed in both fractions which are equivalent in molecular formula and, hence, assumably in molecular structure. Furthermore, the overlap in compositions is appreciable. Although oils and asphaltenes are generally considered to be key intermediates in coal liquefaction, our results show that simple solvent extraction produces compositionally nonunique fractions. Thus, detailed molecular analysis is a prerequisite for the correct assessment of (1) reaction conditions and catalyst on the mechanism and kinetics of coal liquefaction and (2) alteration in process conditions on the quality of the coal liquid. (ERA citation 05:012951)

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