Behavior of ash-forming mineral matter in coal during chemical cleaning with molten caustic
- Ames Lab., Iowa State Univ., Ames, IA (US)
Coal-derived mineral matter, obtained by low-temperature ashing of Kentucky No. 11 coal, as well as mineral-grade samples of quartz, illite, kaolinite, and pyrite, were treated with various ratios of molten caustic (NaOh, KOH, and 1:1 NaOH-KOH mixtures) at 370/sup 0/C for 1-2 hours to study the nature of reaction products obtained under the conditions of chemical cleaning of coal by the molten caustic leaching (MCL) process. Under these conditions, most of the reactions of minerals with caustic were very rapid, being complete in less than 10 minutes. The reaction products were characterized by x-ray diffraction, thermogravimetry analysis, atomic absorption spectrophotometry, and chemical analysis. The nature of these products was related to the stoichiometry of the reaction and was useful in explaining the process chemistry and in developing regeneration schemes for the spent caustic.
- OSTI ID:
- 6780665
- Report Number(s):
- CONF-8806136-
- Journal Information:
- Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States), Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Vol. 33:2; ISSN ACGPA
- Country of Publication:
- United States
- Language:
- English
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