Mechanism for decomposition of aurichalcite—A controlled rate thermal analysis study
Frost, Ray L., Locke, Ashley J., Martens, Wayde N., Hales, Matthew C., Vagvolgyi, Veronika, & Kristof, Janos (2008) Mechanism for decomposition of aurichalcite—A controlled rate thermal analysis study. Thermochimica Acta, 468(1-2), pp. 81-86.
Controlled rate thermal analysis (CRTA) of a series of synthetic aurichalcite (Zn,Cu2+)5(CO3)2(OH)6 with the ratio of Cu/Zn varying from 0.1 to 0.5 proves that the dehydroxylation and carbonate loss occur as non-isothermal and isothermal decompositions. The temperature of the thermal decomposition increases as the Cu/Zn ratio increases. Thermal decomposition of aurichalcite provides a method for preparing mixed oxide catalysts at the molecular level as opposed to the particle level.
CRTA technology enables separation of the processes of dehydration, dehydroxylation and decarbonation. X-ray diffraction of the products of the thermal decomposition proved to be a mixture of the oxides ZnO and Cu2O.
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