Preparation of isotropic carbon fibers from kerosene-purified coal tar pitch by co-carbonization with pyrolysis fuel oil

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Abstract

An inexpensive and general-purpose carbon fiber was prepared using coal tar pitch. In contrast to the solvent extraction process employing expensive solvents, a low-cost centrifugal separation method facilitated the reduction of loss due to the pitch purification and an overall yield increase. The coal tar pitch purified by centrifugation and subsequently co-carbonized with pyrolysis fuel oil improved in spinnability. Moreover, the resulting spinnable pitch had a softening point of 250◦C. The obtained carbon fibers were heat-treated at 1000◦C for 5 min, resulting in a tensile strength of approximately 1000 MPa and an average diameter of 9 µm. In this study, we present an effective method for obtaining low-cost general-purpose isotropic carbon fibers.

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Lee, S. H., Lee, S. M., Park, S., Yoon, S. H., Han, H., & Jung, D. H. (2021). Preparation of isotropic carbon fibers from kerosene-purified coal tar pitch by co-carbonization with pyrolysis fuel oil. Materials, 14(21). https://doi.org/10.3390/ma14216280

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