Precursor memory effect determining structural properties of sulfated zirconia |
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| Authors: | G C Boskovic A R Zarubica M N Kovacevic P S Putanov |
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| Institution: | (1) Faculty of Technology, University of Novi Sad, 21000 Novi Sad, Serbia;(2) Serbian Academy of Sciences and Arts, 11000 Belgrade, Serbia |
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| Abstract: | Properties of two catalysts tailored in the laboratory conditions by sulfation of commercial Zr-hydroxide and Zr-hydroxide
of nitrate origin were compared with those of commercial SO4-Zr-hydroxide. Equally thermally treated samples in the temperature interval 500–700°C, and having the same amount of sulfur,
show different properties indicating memory effect of their solid parent materials. The catalyst obtained by sulfation of
commercial Zr-hydroxide differs in amount of residual sulfates upon calcination from other two catalysts. The instability
of sulfates in the previous case might be connected to the lowest surface area values of catalyst and the highest fraction
of monoclinic phase observed at all applied calcination temperatures. |
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| Keywords: | precursor memory effect structural properties sulfated-zirconia textural properties thermal properties |
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