Journal ArticleDOI
Transmission micro-infrared spectroscopy: An efficient tool for microscale characterization of coal☆
Aïcha Rochdi,Patrick Landais +1 more
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In this paper, the Fourier transform infrared (FT-i.r) was applied to evaluate the heterogeneity and to characterize the individual petrographic components of coal macerals and alteration phenomena.About:
This article is published in Fuel.The article was published on 1991-03-01. It has received 54 citations till now. The article focuses on the topics: Coal.read more
Citations
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The Witwatersrand Basin, South Africa: Geological framework and mineralization processes
TL;DR: The Witwatersrand Basin formed over a period of 360 Ma between 3074 and 2714 Ma Pulses of sedimentation within the sequence and its precursors were episodic, occurring between 3086-3074 Ma (Dominion Group), 2970-2914 Ma (West Rand Group), and 2894-2714 Ma(Central Rand Group) Detritus was derived from a mixed granite-greenstone source of two distinct ages as mentioned in this paper.
Journal ArticleDOI
Studying individual macerals using i.r. microspectrometry, and implications on oil versus gas/condensate proneness and “low-rank” generation
Rui Lin,G. Patrick Ritz +1 more
TL;DR: A reflectance FT-infrared microscope spectrometer has been employed to study the chemical structures of individual macerals including vitrinite, resinite, cutinite and alginite (Botryococcus braunii and Tasmanites).
Journal ArticleDOI
Micro-FTIR spectroscopy of liptinite macerals in coal
Yingting Guo,R. Marc Bustin +1 more
TL;DR: In this paper, the micro-FTIR spectra of liptinite macerals are characterized by stronger aliphatic CH x absorptions at 3000-2800 and 1460-1450 cm −1, less intense aromatic CC ring stretching vibration and aromatic CH out of plane deformation at 1610-1560 and 900-700 cm − 1 respectively and various intense acid cO group absorption at 1740-1700 cm −2.
Journal ArticleDOI
FTIR and 13C NMR Investigation of Coal Component of Late Permian Coals from Southern China
TL;DR: In this article, two separated components, vitrinite and barkinite, and one associated coal sample obtained from South China were studied by Fourier transform infrared spectroscopy (FTIR) and carbon-13 nuclear magnetic resonance (13C NMR) with curve-fitting analysis to obtain information on the concentrations of several functionalities in the samples.
Journal ArticleDOI
Biological affinities of Neoproterozoic acritarchs from Australia: microscopic and chemical characterisation
TL;DR: A range of well-preserved Neoproterozoic acanthomorph and sphaeromorph acritarchs from the Australian Centralian Superbasin have been individually analysed by combined microscopic and chemical methods as mentioned in this paper.
References
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Spectroscopic methods in organic chemistry
Dudley H. Williams,Ian Fleming +1 more
TL;DR: In this article, the authors proposed a structure elucidation by joint application of UV and nuclear magnetic resonance spectra (NMRS) for visible and visible spectra, respectively, in the presence of UV.
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Resolution enhancement of diffuse reflectance i.r. spectra of coals by Fourier self-deconvolution: 1. C-H stretching and bending modes
TL;DR: In this article, diffuse reflectance Fourier transform infrared spectrometry was applied to reduce the widths of all bands in the spectra, and several bands absorbing between 3000 and 2800 cm−1 due to C-H stretching modes of alkyl groups in different environments couId be resolved.
Journal ArticleDOI
Pyrolysis of immature Torbanite and of the resistant biopolymer (PRB A) isolated from extant alga botryococcus braunii. Mechanism of formation and structure of Torbanite
TL;DR: In this paper, an analysis of 400°C pyrolysis products and pyrolyssis residues provided further information on their structure and possible relationships, and the essential role of resistant biopolymer in Torbanite formation was ascertained.
Journal ArticleDOI
FTIR analaysis of coal. 1. techniques and determination of hydroxyl concentrations
TL;DR: In this paper, the preparation of coal samples for the determination of hydroxyl content by FTIR is described, and it is concluded that the FTIR method provides good quality infrared spectra on opaque materials such as coal and char.
Journal ArticleDOI
Reactivity of coal macerals and lithotypes
TL;DR: In this paper, the effects of variations in the maceral composition of coal, in association with rank, upon reactivity in combustion were examined using a simple reactivity test, and the reactivity ranges for two rank series of single seam coals were determined along with the reactionivity ranges obtained from studying lithotypes of various maceral concentrations of a single coal.
Related Papers (5)
Resolution enhancement of diffuse reflectance i.r. spectra of coals by Fourier self-deconvolution: 1. C-H stretching and bending modes
Application of infrared spectroscopy to the classification of kerogentypes and the evaluation of source rock and oil shale potentials
H. Ganz,W. Kalkreuth +1 more