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COPPER CATALYZED LOW-TEMPERATURE PYROLYSIS AS A MEANS FOR UPGRADING LOW-RANK SOLID FUELS.

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COPPER CATALYZED LOW-TEMPERATURE PYROLYSIS AS A MEANS FOR UPGRADING LOW-RANK SOLID FUELS. (EN)
Stournas, S (EN)
Kyriakopoulos, GB (EN)
Papachristos, M (EN)
conferenceItem (EN)
2014-03-01T02:40:50Z
1987 (EN)
Low-rank solid fuels (lignite and peat) are characterized by a high oxygen content on a DAF basis, a large proportion of which belongs to carboxyl and hydroxyl groups. These groups being thermally labile, the oxygen content of low rank coals can be decreased (and their heat content per unit mass correspondingly increased) by subjecting them to simple pyrolytic treatment. It has been found that the behavior of certain types of lignite and peat is similar to that of simple carboxylic acids in that the thermal decarboxylation process can be catalyzed by specific metal ions. Thus when lignite and peat, in the presence of small amounts of copper, are pyrolyzed at low temperatures (160 degree -200 degree C) they readily undergo decarboxylation and dehydration and their higher heating values on a DAF basis show increases on the order of 30%. When uncatalyzed, these same reactions require temperatures in excess of 300 degree C. (EN)
Chemistry, Multidisciplinary (EN)
OXYGEN CONTENT (EN)
CATALYSIS (EN)
HEAT CONTENT (EN)
PEAT - Pyrolysis (EN)
DEHYDRATION (EN)
LOW TEMPERATURE PYROLYSIS (EN)
CATALYSTS - Copper (EN)
LOW-RANK SOLID FUELS (EN)
COAL (EN)
THERMAL DECARBOXYLATION (EN)
LIGNITE - Pyrolysis (EN)
CHEMICAL REACTIONS - Low Temperature Effects (EN)
ACS Division of Fuel Chemistry, Preprints (EN)
English
ACS, Washington, DC, USA (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
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