Matches in SemOpenAlex for { <https://semopenalex.org/work/W45794699> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W45794699 abstract "Anthracite has been treated under conditions of pressures and temperatures higher than those normally associated with its formation. Hydrothermal apparatus was used for studies on sealed samples up to 900/sup 0/C and 20,000 psi, and high pressure apparatus was used, with smaller samples, up to 700/sup 0/C and 450,000 psi. Results were evaluated by x-ray diffraction, reflectance, microscopy and other diagnostic methods. Changes in reflectance, in morphology and in the mineral assemblages were the most useful guides to the alteration processes which generally resulted in an increased ''rank'' for the coal. Graphitization could not be demonstrated clearly by x-ray methods, but it is inferred from reflectance and other data. The increases in reflectance depended chiefly on the temperatures used and on the original rank of the coal, and to a much lesser extent, on the pressure. Fusion of anthracite, not previously reported, was attained at pressures of 2,000 psi at about 425/sup 0/C. Volatile evolution from anthracite was controlled by a small water content in the initial charge. At 10,000 psi and 620/sup 0/C, for example, the equilibrium gas mixture contained almost 90% methane and only 1% hydrogen, quite the reverse of the usual volatilization studies. The inorganic or ash-formingmore » elements in anthracite were mobilized into mineral assemblages characteristic for the conditions of the experiments. The results permit some estimate of metamorphic processes in the formation of anthracites. They also serve as a beginning in the development of a process which might be useful in the production of special carbons from anthracite.« less" @default.
- W45794699 created "2016-06-24" @default.
- W45794699 creator A5014558744 @default.
- W45794699 creator A5045064013 @default.
- W45794699 creator A5053122458 @default.
- W45794699 creator A5082037775 @default.
- W45794699 date "1963-04-29" @default.
- W45794699 modified "2023-09-27" @default.
- W45794699 title "Studies of anthracite coals at high pressures and temperatures" @default.
- W45794699 hasPublicationYear "1963" @default.
- W45794699 type Work @default.
- W45794699 sameAs 45794699 @default.
- W45794699 citedByCount "0" @default.
- W45794699 crossrefType "journal-article" @default.
- W45794699 hasAuthorship W45794699A5014558744 @default.
- W45794699 hasAuthorship W45794699A5045064013 @default.
- W45794699 hasAuthorship W45794699A5053122458 @default.
- W45794699 hasAuthorship W45794699A5082037775 @default.
- W45794699 hasConcept C107872376 @default.
- W45794699 hasConcept C113196181 @default.
- W45794699 hasConcept C127313418 @default.
- W45794699 hasConcept C156622251 @default.
- W45794699 hasConcept C165205528 @default.
- W45794699 hasConcept C178790620 @default.
- W45794699 hasConcept C185592680 @default.
- W45794699 hasConcept C199289684 @default.
- W45794699 hasConcept C2776432453 @default.
- W45794699 hasConcept C47143284 @default.
- W45794699 hasConcept C512968161 @default.
- W45794699 hasConcept C516920438 @default.
- W45794699 hasConcept C518851703 @default.
- W45794699 hasConcept C5413467 @default.
- W45794699 hasConceptScore W45794699C107872376 @default.
- W45794699 hasConceptScore W45794699C113196181 @default.
- W45794699 hasConceptScore W45794699C127313418 @default.
- W45794699 hasConceptScore W45794699C156622251 @default.
- W45794699 hasConceptScore W45794699C165205528 @default.
- W45794699 hasConceptScore W45794699C178790620 @default.
- W45794699 hasConceptScore W45794699C185592680 @default.
- W45794699 hasConceptScore W45794699C199289684 @default.
- W45794699 hasConceptScore W45794699C2776432453 @default.
- W45794699 hasConceptScore W45794699C47143284 @default.
- W45794699 hasConceptScore W45794699C512968161 @default.
- W45794699 hasConceptScore W45794699C516920438 @default.
- W45794699 hasConceptScore W45794699C518851703 @default.
- W45794699 hasConceptScore W45794699C5413467 @default.
- W45794699 hasLocation W457946991 @default.
- W45794699 hasOpenAccess W45794699 @default.
- W45794699 hasPrimaryLocation W457946991 @default.
- W45794699 hasRelatedWork W147854060 @default.
- W45794699 hasRelatedWork W1497514552 @default.
- W45794699 hasRelatedWork W1550886057 @default.
- W45794699 hasRelatedWork W1557124738 @default.
- W45794699 hasRelatedWork W1593905211 @default.
- W45794699 hasRelatedWork W1604055404 @default.
- W45794699 hasRelatedWork W1810804900 @default.
- W45794699 hasRelatedWork W1969473805 @default.
- W45794699 hasRelatedWork W2045884809 @default.
- W45794699 hasRelatedWork W2067869610 @default.
- W45794699 hasRelatedWork W2074286703 @default.
- W45794699 hasRelatedWork W2115857996 @default.
- W45794699 hasRelatedWork W2151414215 @default.
- W45794699 hasRelatedWork W220817478 @default.
- W45794699 hasRelatedWork W284050806 @default.
- W45794699 hasRelatedWork W2929239469 @default.
- W45794699 hasRelatedWork W2965482788 @default.
- W45794699 hasRelatedWork W3011469949 @default.
- W45794699 hasRelatedWork W3147485496 @default.
- W45794699 hasRelatedWork W1965125301 @default.
- W45794699 isParatext "false" @default.
- W45794699 isRetracted "false" @default.
- W45794699 magId "45794699" @default.
- W45794699 workType "article" @default.