Statistical evaluation of the mutual relations of properties of Mg/Fe hydrotalcites and mixed oxides as transesterification catalysts
Source abstract
Abstract
Abstract The Mg-Fe mixed oxides with different Mg/Fe molar ratio (from 1:1 to 8:1) and temperature pre-treatment (0–900 °C) were prepared from layered double hydroxides (LDH) as precursors. The LDH were synthesized by co-precipitation method. The formed mixed oxides (calcined LDH) were tested within the transesterification of rapeseed oil including the leaching of magnesium and iron to the liquid products. All synthesized materials were characterized by several techniques such as XRD, thermogravimetric analysis, specific surface area and SEM. The mutual relations between material properties were found by statistical analysis. Moreover, the real molar ratio of Mg/Fe was determined by two independent methods (atomic absorption spectroscopy and X-ray fluorescence-XRF) with nearly the same results. It is possible to use only faster and cheaper XRF. It was found, that mixed oxides were formed at Mg/Fe molar ratio from 2 to 6 and at temperature between 400 and 600 °C. The highest yield of oil was achieved with Mg/Fe molar ratio 5:1 calcined at 500 °C. Moreover, statistical evaluation with the aim to find the relations between properties of synthesized material was carried out.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Mesoporous Materials and Catalysis · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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