Pyrolytic decomposition of carboxylate salts /
A mixture of fermentation broth salts (FBS) was dewatered from a mixed-acid fermentation broth containing primarily calcium acetate (Ca(Ac)₂), calcium propionate (Ca(Pr)₂), and calcium butyrate (Ca(Bu)₂). These salts were pyrolyzed at 380-490⁰C. Pure calcium salts of acetate, propionate, and butyr...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2002.
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| Summary: | A mixture of fermentation broth salts (FBS) was dewatered from a mixed-acid fermentation broth containing primarily calcium acetate (Ca(Ac)₂), calcium propionate (Ca(Pr)₂), and calcium butyrate (Ca(Bu)₂). These salts were pyrolyzed at 380-490⁰C. Pure calcium salts of acetate, propionate, and butyrate produced acetone, diethyl ketone (DEK), and dipropyl ketone (DPK), respectively, whereas FBS produced a mixture of ketones. The yields of acetone and DEK increased with higher temperature, whereas those of DPK and the ketone mixture were temperature-independent. The decomposition of each salt was determined to be first order by the differential method. The kinetic constants activation energy E and frequency factor k₀, obtained from the Arrhenius equation- decreased with increased molecular weight of the salt. Although composed of 45% of acetate, FBS had kinetic behavior similar to calcium butyrate, indicating the interaction with higher carbon-number components. A temperature at 420⁰C was satisfactory for FBS pyrolysis, achieving over 99% conversion in 30 minutes. |
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| Item Description: | Vita. "Major subject: Chemical Engineering". |
| Physical Description: | xi, 119 leaves : illustrations ; 28 cm. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaf 55). |