Journal ArticleDOI
FTIR analaysis of coal. 1. techniques and determination of hydroxyl concentrations
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TLDR
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.About:
This article is published in Fuel.The article was published on 1982-07-01. It has received 175 citations till now. The article focuses on the topics: Coal & Absorbance.read more
Citations
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Quantitative X-ray diffraction analysis and its application to various coals
TL;DR: In this paper, a technique is presented to obtain the maximum structural information on carbonaceous materials from their X-ray scattering curves in the middle and high range of scattering angle, which is based on qualitative observations, in which only two types of carbon structures including crystalline carbon and amorphous carbon are considered, is suggested.
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Coal pyrolysis: Experiments, kinetic rates and mechanisms
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Photoacoustic and related photothermal techniques
H. Vargas,L.C.M. Miranda +1 more
TL;DR: In this article, the authors review the theory and applications of photoacoustic and related methods belonging to the general area of photothermal measurement techniques, including spectroscopic applications such as infrared and microwave spectroscopies, monitoring of non-radiative deexcitation processes, biological applications, and measurements of thermal properties.
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FT-i.r. study of hydrogen bonding in coal☆
TL;DR: In this article, the exact nature of the hydrogen-bonded species present in coal was discussed and band assignments and the importance of hydrogen bonded groups in coal were discussed.
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FT-i.r. analysis of coal: 2. Aliphatic and aromatic hydrogen concentration
TL;DR: In this paper, the authors considered the use of FT-i.r. spectra for the quantitative determinations of aliphatic hydrogen, H al, and aromatic hydrogen H ar, in coals.
References
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Diffuse reflectance measurements by infrared Fourier transform spectrometry
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Photoacoustic Fourier Transform Infrared Spectroscopy of Solid Samples
TL;DR: In this article, the advantages and disadvantages of photoacoustic detection are discussed, and comparisons of sample spectra obtained by different techniques, including photoacoustical detection, are presented and compared.
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Fourier Transform Infrared study of mineral matter in coal. A novel method for quantitative mineralogical analysis
TL;DR: In this paper, the low-temperature ash of coal is analyzed by means of absorbance spectral subtraction of individual components, stored in digital form on computer memory, multiplied by appropriate weighting factors and subtracted from the spectrum of the low temperature ash, so that the characteristic bands of the mineral are removed.
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Selective alkylation of acidic hydroxyl groups in coal
TL;DR: In this paper, a new selective alkylation procedure was developed which converted polar hydroxyls into relatively non-polar ethers and esters, and has been successfully tested on a bituminous and sub-bituminous coal.