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Titolo:
Dynamic viscoelastic measurement of coal extracts and residues
Autore:
Yoshida, T; Takanohashi, T; Iino, M; Katoh, K;
Indirizzi:
Natl Inst Resources & Environm, Tsukuba, Ibaraki 3058569, Japan Natl Inst Resources & Environm Tsukuba Ibaraki Japan 3058569 58569, Japan Tohoku Univ, Inst Chem React Sci, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 ci, Sendai, Miyagi 9808577, Japan Nippon Steel Corp Ltd, Steel Res Labs, Futtsu 2938511, Japan Nippon Steel Corp Ltd Futtsu Japan 2938511 s Labs, Futtsu 2938511, Japan
Titolo Testata:
ENERGY & FUELS
fascicolo: 1, volume: 15, anno: 2001,
pagine: 170 - 175
SICI:
0887-0624(200101/02)15:1<170:DVMOCE>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
CS2-N-METHYL-2-PYRROLIDINONE MIXED-SOLVENT; FLUIDITY; ADDITIVES; TEMPERATURE; SOLUBILITY; YIELD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Takanohashi, T Natl Inst Resources & Environm, Tsukuba, Ibaraki 3058569, Japan Natl Inst Resources & Environm Tsukuba Ibaraki Japan 3058569
Citazione:
T. Yoshida et al., "Dynamic viscoelastic measurement of coal extracts and residues", ENERG FUEL, 15(1), 2001, pp. 170-175

Abstract

Goonyella coking coal was extracted with tetrahydrofuran (THF), chloroform, N-methyl-2-apyrrolidinone (NMP), pyridine, and a 1:1 (v/v) carbon disulfide/N-methyl-2-pyrrolidinone (CS2/NMP) mixed solvent. Temperature-variable dynamic viscoelastic measurement was carried out for the extracts and residues obtained. The thermoplasticity in residues obtained by chloroform or NMPextractions significantly decreased compared to that of the raw coal despite the fact that the extraction yields, 2.7 and 5.4 wt % (daf), respectively, were low. A further decrease in thermoplasticity was observed for residues obtained in high yield with pyridine (20.6 wt %) and CS2/NMP (42.8 wt %). On the other hand, the thermoplastic state was observed in the range 260-500 degreesC for the pyridine soluble (Sox-PS) fraction obtained from pyridine Soxhlet extraction, while the thermoplasticity for the pyridine insoluble fraction (PIMS) obtained from pyridine fractionation of the CS2/NMP extract fraction was significantly smaller and similar in value to that for residues left after chloroform or NMP extractions, despite the fact that the PIMS originally was a component of a solvent-soluble fraction. The role of solvent-soluble components on the thermoplasticity of coals is discussed based on these results and results of an earlier study.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 09:22:55