Showing papers by "Martin L. Gorbaty published in 1990"
TL;DR: X-ray photoelectron spectroscopy (XPS) was applied to the problem of speciating and quantifying organically bound forms of sulphur in nonvolatile and solid hydrocarbons as mentioned in this paper.
273 citations
TL;DR: In this paper, a sulphur K edge X-ray absorption spectroscopic method has been developed for direct determination and quantification of the sulphidic and thiophenic forms of organically bound sulphur in nonvolatile petroleum and coal samples.
88 citations
TL;DR: In this paper, X-ray absorption near edge structure (XANES) spectroscopy and Xray photoelectron spectroscopic (XPS) were used to study the chemistry of organically bound sulphur species in coal during mild coal oxidation.
59 citations
TL;DR: In this paper, the utility of X-ray Photoelectron Spectroscopy (XPS) and Sulfur Xray Absorption Near Edge Structure (XANES) for the determination and quantification of sulfur forms in coal and petroleum asphaltenes has been demonstrated.
38 citations
TL;DR: In this article, a monophase model was proposed for coal, which postulates that large amounts of neutral small molecules are not tightly occluded inside the coal network and the ''mobile phase'' consists largely of partial consistents of macromolecules.
Abstract: The two-phase model for coal states that relatively large amounts of low-molecular-weight compounds are physically trapped in the macromolecular network. This model was tested by studying tetrahydrofuran (THF) extracts of original and n-butylamine-treated Illinois No. 6 coal and a heat-treated sample of the n-butylamine-treated coal's THF extract. It is concluded that the two-phase model is not applicable for this high-volatile bituminous coal. A monophase model is proposed in this paper, which postulates that (1) large amounts of neutral small molecules are not tightly occluded inside the coal network and (2) the «mobile phase» consists largely of partial consistents of macromolecules
14 citations