Hydration enthalpy of hydrotalcite low-temperature metaphases.
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Accession number;02A0408702
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| Title;Hydration enthalpy of hydrotalcite low-temperature metaphases. |
| Author;
PETROVA N
(Yamaguchi Univ., Ube, Jpn)
MIZOTA T
(Yamaguchi Univ., Ube, Jpn)
STANIMIROVA T
(Sofia Univ., Sofia, Bgr)
KIROV G
(Sofia Univ., Sofia, Bgr)
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Journal Title;J Mineral Petrol Sci
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Journal Code:G0150B
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ISSN:1345-6296
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VOL.97;NO.1;PAGE.1-6(2002)
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| Figure&Table&Reference;FIG.5, TBL.1, REF.14 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Enthalpies of hydration of low-temperature hydrotalcite(HT) metaphases have been measured by means of the adiabatic water-vapor absorption calorimeter. The metaphases were characterized by the Mg/Al ratio of 3:1 and CO2-3 interlayer group. The hydration heat for HT-B(partially dehydroxylated HT with bidentate bonded CO2-3) is 2-3 times larger than that of HT-D(dehydrated HT), if they are treated at the same dehydration temperature. Large absolute values of hydration heat, namely 398.+-.4 and 508.+-.10Jg-1, were obtained for the HT-B at respective low dehydration temperatures, 70 and 110.DEG.C.. This may promise the HT-B to be a new prospective heat exchanger usable at relatively low temperatures. (author abst.) |
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