Zobrazeno 1 - 10
of 30
pro vyhledávání: '"William H. Calkins"'
Publikováno v:
Energy & Fuels. 13:1097-1104
Volatile matter evolved during pyrolysis of 20 different rank coals was studied by thermogravimetry−photoionization mass spectrometry (TG-PI-MS). The composition of the TGA effluent revealed several significant trends with coal rank. First, the rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e14f5892921131e04df62b5dcabcf7f3
https://doi.org/10.1021/ef990069w
https://doi.org/10.1021/ef990069w
Publikováno v:
Energy & Fuels. 13:396-400
A wide range of coal ranks from lignite to anthracite has been investigated using thermogravimetric analysis (TGA). The derivative peak maximum for volatile matter evolution shows a strong correlation (r 2 = 0.998) with vitrinite reflectance, thereby
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7295afc77791433c6f443adf746911c
https://doi.org/10.1021/ef980088q
https://doi.org/10.1021/ef980088q
Publikováno v:
Energy & Fuels. 12:1335-1341
The objectives of this study were to understand the characteristics of coal liquefaction resids from the direct two-stage coal liquefaction process, the reactivity of these resids in hydroconversion, and the relationship between resid reactivity and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::169db40146d676b67b08d73b015add31
https://doi.org/10.1021/ef980102z
https://doi.org/10.1021/ef980102z
Publikováno v:
Energy & Fuels. 12:95-101
A previous paper has shown that direct coal liquefaction in the absence of a catalyst consists of two distinct stages which are readily distinguishable with an appropriate short contact time liquefaction reactor and thermogravimetric analysis. The fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e36fdc531b6b73c563c37431fe80d5a3
https://doi.org/10.1021/ef970073c
https://doi.org/10.1021/ef970073c
Publikováno v:
Energy & Fuels. 10:641-648
Kinetics of thermal and catalyzed coal liquefaction was investigated from 10 s to as long as 60 min using a short contact time batch reactor (SCTBR). Using this reactor system avoids the problems of slow heat up and cool down associated with the mass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2161d7ef5fc16c4e052877905c8fdc50
https://doi.org/10.1021/ef950260f
https://doi.org/10.1021/ef950260f
Publikováno v:
Energy & Fuels. 8:1304-1309
Study of the chemical reactions involved in the initial stages of coal liquefaction was carried out in a novel laboratory scale batch reactor capable of operation up to 450°C and 17 MPa (2500 psig) under well-defined contact times from a few seconds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1931c1b868ff3d00b9bbf134303335bc
https://doi.org/10.1021/ef00048a019
https://doi.org/10.1021/ef00048a019
Publikováno v:
Energy & Fuels. 8:1310-1315
The underlying basis for the exceptional performance of a heat exchanger preheater for a novel short contact time batch reactor (SCTBR) was investigated. Three levels of analysis, ranging from equilibrium calculations to a finite difference solution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbc0cbcf57457244f721230070a2e196
https://doi.org/10.1021/ef00048a020
https://doi.org/10.1021/ef00048a020
Publikováno v:
Industrial & Engineering Chemistry Research. 33:2272-2279
The conversion of two coal-derived nondistillable residua (resids) in tetralin during hydroprocessing has been examined. A novel laboratory scale batch reactor capable of operation up to 450°C and 17 MPa (2500 psi) under well-defined contact times f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02a51be1ba335bdd76d60ceaf6eab727
https://doi.org/10.1021/ie00034a004
https://doi.org/10.1021/ie00034a004
Autor:
William H. Calkins
Publikováno v:
Fuel. 73:475-484
The sulfur in coal exists in inorganic and organic forms. The inorganic forms are usually sulfides and sulfates, with pyrite the major inorganic sulfur contaminant in most coals. Analytical methods are available for determining these inorganic sulfur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0abf4140fd617ba51730223d04737ed6
https://doi.org/10.1016/0016-2361(94)90028-0
https://doi.org/10.1016/0016-2361(94)90028-0
To provide a better understanding of the roles of a solid catalyst and the solvent in Direct Coal Liquefaction, a small reactor was equipped with a porous-walled basket which was permeable to the solvent but was not permeable to the coal or solid cat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::790f20b66d7a9e2636aca5ffd449ffe2
https://doi.org/10.2172/791854
https://doi.org/10.2172/791854
