Chemical alteration of coals and their reactivity with tetralin and methanol under liquefaction conditions
| Autor: | J. Bimer, R. Gruber, Peter N. Kuznetsov, P.D. Salbut, Eugeny D. Korniyets, Galina I. Sukhova, Dominique Brodzki, Céline Sayag, Gérald Djéga-Mariadassou |
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| Rok vydání: | 1994 |
| Předmět: |
Bituminous coal
business.industry General Chemical Engineering Organic Chemistry geology.rock_type technology industry and agriculture geology Energy Engineering and Power Technology Liquefaction complex mixtures respiratory tract diseases Solvent chemistry.chemical_compound Fuel Technology chemistry otorhinolaryngologic diseases Organic chemistry Coal Reactivity (chemistry) Tetralin Methanol Solubility business |
| Zdroj: | Fuel. 73:901-906 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/0016-2361(94)90285-2 |
| Popis: | The effect was studied of pretreatment techniques, including O-methylation with (CH 3 ) 2 SO 4 , reduction with both K-isopropanol in THF and LiAlH 4 , reductive methylation with KCH 3 I in THF and combination thereof, on the extractability in THF of coals of different rank and on their reactivity in non-catalytic hydroliquefaction in methanol and tetralin at 380 °C. Dramatic changes in composition of the treated coals and products were found. Chemical pretreatment had a beneficial effect on coal solubility in THF and on hydroliquefaction in tetralin. O-methylation was the most effective for lignite, but reductive methylation had the most beneficial effect for high-rank coal. With methanol as solvent, reduction and O-methylation had a small effect on coal reactivity for liquefaction. The role of cross-links is discussed in order to explain the liquefaction behaviour of coals in solvents. |
| Databáze: | OpenAIRE |
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