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Structure and Reactivity of Coal pp 243–268Cite as

Coal Depolymerization and Liquefaction

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Abstract

Coal is generally an insoluble material which is an obstacle to solution based chemical analysis techniques. It can be useful to consider coal as a complex polymeric substance, composed of a wide variety of monomeric units with a disorganized structure that resists dissolution. Depolymerization and liquefaction studies concern processes that break down these insoluble polymers into soluble constituents. This can be achieved indirectly via gasification, however direct methods involving solvent extraction liquefaction, and catalytic liquefaction can give a deep insight into the chemical structure and reactivity of the precursor coal that is used. In this chapter we discuss the various conditions such as temperature solvent and catalysts that are used for liquefaction of coal and their applications to the study of different Chinese coal types. We introduce the mechanisms that contribute to specific composition of soluble fractions, and pay particular attention to the use of infrared spectroscopy in the study of these components.

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Authors and Affiliations

  1. Taiyuan University of Technology, Taiyuan, China

    Ke-Chang Xie

  2. Tsinghua University, Beijing, China

    Ke-Chang Xie

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  1. Ke-Chang Xie
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Correspondence to Ke-Chang Xie .

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Xie, KC. (2015). Coal Depolymerization and Liquefaction. In: Structure and Reactivity of Coal. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-47337-5_6

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  • DOI: https://doi.org/10.1007/978-3-662-47337-5_6

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-47336-8

  • Online ISBN: 978-3-662-47337-5

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