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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/023/02/0141-0145

    • Keywords

       

      Hydroxides ; hydrotalcites ; temperature programmed decomposition (TPD)

    • Abstract

       

      Mass spectrometric analysis of gases evolved during thermal decomposition of divalent metal hydroxides, hydroxysalts and hydrotalcites show that all these compounds undergo dehydration in the temperature range 30 <T < 220°C followed by decomposition at temperatures above 250°C. The latter step involves simultaneous deanation and dehydroxylation of the layers. Our observations conclusively prove that alternative mechanisms which envisage CO2 evolution due to deanation at lower temperatures proposed by Kanezaki to be wrong.

    • Author Affiliations

       

      Parthasarathi Bera1 Michael Rajamathi1 M S Hegde1 P Vishnu Kamath1 2

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012, India
      2. Department of Chemistry, Central College, Bangalore University, Bangalore - 560 001, India
    • Dates

       

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