Preparation and characterization of Fe/MgO catalysts obtained from hydrotalcite-like compounds

The Reduction of Mg–Fe–O and Mg–Fe–Al–O Complex Oxides Studied by Temperature-Programmed Reduction Combined with in Situ Mössbauer Spectroscopy

“…Hydrotalcite-like compounds with Mg/Fe/Al ratios of 1/1/0, 4/3/1, 2/1/1, and 4/1/3 were prepared by the coprecipitation method (6) ). Then, the two solutions were added dropwise into 250 ml of deionized water at 403C in a 1000-ml beaker over an interval of 30 min, during which time a brown precipitate was formed.…”

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

“…Several publications in the open literature have shown that hydrotalcites and related materials perform well in this reaction. [229][230][231][232] Typically, the catalytic materials contain either iron or cobalt as active component. The composition of the bio-syngas obtained from lignin depends on the gasification temperature and pressure, the presence of steam and oxygen, heating rate, and the feed elemental composition.…”

Microcalorimetric Studies of Surface Acid/Base Properties of Magnesium Iron Catalysts Prepared from Hydrotalcite-Type Precursors

“…All the Mg-Fe samples prepared before calcination exhibited the typical XRD patterns of the hydrotalcite structure as described in the previous paper (24). The XRD patterns of the Mg-Fe samples after calcination are shown in Fig.…”

“…The preparation of magnesium hydroxide, ferric hydroxide, and Mg-Fe HTLC samples with Mg/Fe molar ratios 1, 3, and 6 was described in our previous paper (24). After calcination at 673 K, these precursors were converted into corresponding oxides.…”

“…This indicates that the metallic iron did not cover the oxygen anions; instead, the reduction at 773 K produced more oxygen anions on the surface for the adsorption of carbon dioxide. This may explain why this sample exhibited much higher olefin selectivity than the pure iron sample in the Fischer-Tropsch reaction (24).…”