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- W2233411554 abstract "The following samples have been investigated as examples for the applicability of the atmospheric pressure temperature programmed reduction (AP-TPR) technique: Indiana No. 5, Herrin No. 6, and Upper-Freeport (Argonne Premium coal, USA), Kimmeridge Dorset-Cuddle (Type II kerogen, UK) and Mequinenza (lignite, Spain). The Mequinenza lignite has been treated with diluted nitric acid in order to remove pyrite while for the Upper Freeport and the Kimmeridge the pyrite was removed by a LiAlH{sub 4} treatment. The Indiana No. 5 and Herrin No. 6 were treated with a peroxy-acetic acid solution at room temperature in order to remove beside pyrite also other sulfur groups. The AP-TPR profiles of the treated and untreated samples are discussed and compared with each other. It is demonstrated that LiAlH{sub 4} as the peroxide treatment not only removes pyrite, but also changes and removes other sulfur functionalities. The AP-TPR technique proved that the pyrite signal is clearly resolved and that possible retrogressive reactions might be hidden under other sulfur functionalities, which has no important influence on the interpretation of the AP-TPR profile after pyrite reduction." @default.
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- W2233411554 date "1995-12-31" @default.
- W2233411554 modified "2023-09-24" @default.
- W2233411554 title "Determination of organic sulfur forms in some coals and kerogens by atmospheric pressure temperature programmed reduction (AP-TPR)" @default.
- W2233411554 hasPublicationYear "1995" @default.
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