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首页> 美国政府科技报告 >Coal liquefaction process streams characterization and evaluation: The use of selective chemical reactions and carbon NMR spectroscopy in the speciation and quantification of oxygen functional groups in coal resids
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Coal liquefaction process streams characterization and evaluation: The use of selective chemical reactions and carbon NMR spectroscopy in the speciation and quantification of oxygen functional groups in coal resids

机译：煤液化工艺流表征和评估：选择性化学反应和碳核磁共振光谱在煤中氧官能团的形态和量化中的应用

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This study demonstrated the feasibility of using phase-transfer methylation reactions for the derivatization of hydroxyl functionalities and single-electron transfer reactions to cleave ether groups in distillation resid materials derived from direct coal liquefaction. (sup 13)C-NMR was used to analyze the reaction products. It was demonstrated that the techniques can be used to speciate and quantify about half of the oxygen in resids. The remaining half of the oxygen is presumed to be present as unreactive ethers, probably dibenzofurans. Hydroxyl concentrations were determined on five resid samples and ether cleavage reactions were conducted on three of those five. Further development of this general analytical strategy as a process development tool is justified based on these results.

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