View More View Less
  • 1 Inorganic and Applied Chemistry Institute University of Hamburg Martin-Luther-King-Platz 6 20146 Hamburg Germany
Restricted access

The thermochemical reduction of transition metal silicates, i.e. garnierite (Ni,Mg)6[(OH)8(Si2O7)], chrysocolla (Cu,Al)2H2Si2O5(OH4)·nH2O, dioptase CuSiO3·H2O, willemite Zn2SiO4, and hemimorphite Zn4Si2O7(OH)2·H2O has been studied. By means of combined thermogravimetric/mass spectrometric measurements, X-ray diffraction and analytical scanning electron microscopy it is shown that in a 5% H2/95% N2 or in a methane atmosphere the transition metals are selectively reduced at temperatures qualitatively corresponding to their electrochemical potential. Mixtures of elemental transition metals and quartz, SiO2, are obtained as solid products. Depending on the nature of the parent mineral, different mixtures of volatile products are obtained. Principal volatile product, however, is water vapour. The reduction in methane leads to the formation of syngas.

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
per Year
per Year
Founder Akadémiai Kiadó
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jan 2022 1 0 0
Feb 2022 1 1 1
Mar 2022 2 0 0
Apr 2022 0 0 0
May 2022 1 0 0
Jun 2022 0 0 0
Jul 2022 0 0 0