Alan Davis
Pennsylvania State University
84 Papers
1.6K Citations
Alan Davis is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Coal & Vitrinite. The author has an hindex of 32, co-authored 84 publications. Previous affiliations of Alan Davis include Case Western Reserve University.
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Papers
Concerning the Application of FT-IR to the Study of Coal: A Critical Assessment of Band Assignments and the Application of Spectral Analysis Programs
Paul C. Painter,Randy W. Snyder,Michael Starsinic,Michael M. Coleman,Deborah W. Kuehn,Alan Davis +5 more
TL;DR: In this article, the problems associated with the application of FT-IR to the characterization of coal structure are critically discussed and the controversies concerning band assignments are considered and it is concluded that the strong 1600 cm−1 band can be assigned to an aromatic ring stretching mode that in most coals is intensity enhanced by the presence of phenolic groups.
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Concerning the 1600 cm−1 region in the i.r. spectrum of coal
TL;DR: In this article, a high-resolution Fourier transform infrared spectrometer was used to provide additional support for the assignment of the 1600 cm−1 band to an aromatic stretching mode.
135
Determination of chemical-structural changes in vitrinite accompanying luminescence alteration using C-NEXAFS analysis
TL;DR: In this article, carbon near edge X-ray absorption fine structure (C-NEXAFS) spectroscopy is used to monitor the gain and loss of organic functionality in ultra-thin sections of vitrinite following time incremental exposure to blue light (390-490 nm) irradiation in air.
121
Dependence of coal liquefaction behaviour on coal characteristics. 4. Cluster analyses for characteristics of 104 coals
TL;DR: In this article, the conversion of 104 high volatile bituminous coals at 400 °C with tetralin has been determined in duplicate with the aid of a new reactor system.
114
Dependence of coal liquefaction behaviour on coal characteristics. 2. Role of petrographic composition
TL;DR: In this paper, a comparison of the liquefaction behaviour of two lithotypes from a Kentucky bituminous coal indicated that in this process pseudovitrinite is a reactive maceral.
111