Hyper-coal process to produce the ash-free coal

Okuyama, Noriyuki; Komatsu, Nobuyuki; Shigehisa, Takuo; Kaneko, Takao; Tsuruya, Shigeru

doi:10.1016/j.fuproc.2003.10.019

Cited by 169 publications

(134 citation statements)

References 11 publications

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“…Coal A and B were caking coals, and Coal C was a slightly caking coal. HPC was produced from a steam coal by solvent extraction at 653 K. 8) The results of the ultimate analysis and the proximate analysis and logarithm of maximum fluidity of coals and HPC are shown in Table 1. Two different coke samples (Coke A and Coke B) were prepared by blending these coals and additive.…”

Section: Samplesmentioning

confidence: 99%

Effect of Volume Breakage Due to DI Measurement on Pore Structure in Coke

et al. 2016

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Section: Samplesmentioning

confidence: 99%

Effect of Volume Breakage Due to DI Measurement on Pore Structure in Coke

et al. 2016

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“…For example, coal tar and coal tar pitch are most typical coal derived by-products which have been intensively and thoroughly studied to utilize them for the production of various functional carbon materials such as carbon fiber, graphite electrodes and activated carbon [10][11][12]. Coal tar is a typical byproduct of coal carbonization which can be produced through the coal pyrolysis over 800°C in coke oven [13], while HPC is a very special coal liquefied products which has been only experienced the heat treatment of less than 400°C [14]. From these reasons, HPC has very different characteristics from coal tar.…”

Section: Of 10mentioning

confidence: 99%

Improving Spinnability of Hyper-coal Derived Spinnable Pitch through the Hydrogenation with 1, 2, 3, 4-tetrahydroquinoline

Yang¹,

Wu²,

Zhang³

et al. 2018

Preprint

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Abstract:The proper hydrogenation of Hyper-coal (HPC) using 1, 2, 3, 4-tetrahydroquinoline (THQ) was able to decrease the oxygen content and adjust the molecular structure of HPC for preparing the spinnable pitch with high softening point (SP). The spinnable pitch prepared from the THQsoluble (QS) fraction of HPC as a precursor consisted more naphthenic carbon groups than that prepared from the 1-methylnaphthalene (1-MN) soluble (MNS) fraction of HPC. The HPC-QS derived spinnable pitch showed excellent spinning performance even the SP of 260°C, and the tensile strength of the resultant carbon fiber was increased to 1350 MPa with a diameter around 8 µm under the only carbonization temperature of at 800°C for 5 min.

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“…[5][6][7] Coal has poor solubility into a solvent because of its structure with molecules entangled intricately. However aggregation relieved by heat improves its extractability to a solvent.…”

Section: Introductionmentioning

confidence: 99%

Coking Technology Using Heavy Oil Residue and Hyper Coal

2014

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Oil sand bitumen and hypercoal are examined as a caking additives to the mixture of strongly coking coal and non-slightly coking coal. Samples were coked, then their strength, crystallinity of the carbon structure, and an anisotropic microstructure were measured. Oil sand bitumen addition enhanced strength, but 15% addition caused a strength decline because of the formation of large pores and cracks. Hypercoal addition increased strength with increased its content. Correlation was observed between increased strength and the crystallinity of a carbon structure or the anisotropic microstructure. Results suggest that mutual melting occurred between a coal blend and a caking additive. Then the caking additive took a carbon structure with high crystallinity by coking, achieved a function as a binder material that connects coal-particle interfaces, and ultimately enhanced strength.

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Hyper-coal process to produce the ash-free coal

Cited by 169 publications

References 11 publications

Effect of Volume Breakage Due to DI Measurement on Pore Structure in Coke

Effect of Volume Breakage Due to DI Measurement on Pore Structure in Coke

Improving Spinnability of Hyper-coal Derived Spinnable Pitch through the Hydrogenation with 1, 2, 3, 4-tetrahydroquinoline

Coking Technology Using Heavy Oil Residue and Hyper Coal

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