Untitled

Porous structure of intercalated cobalt ferrocyanides

“…= 64 m 2 /g and Vs = 0.132 cm 3 /g, then for samples modified with hydroxocomplexes in the amount of 5 mmol Fe 3+ per gram of the sample, they are respectively 131 m 2 /g and 0.2 cm 3 /g. With an increase in the amount of modifying agent, the surface area significantly increases to 170 m 2 / g, the sorption volume increases slightly [7] Based on the above, the following mechanism of formation of the porous structure of modified materials is presented to us.…”

“…Ferrocyanide crystals generally have a bulk or face-centered crystal lattice, and the porous structure is determined by the size of the crystallites and the way they are packaged. Under certain conditions of synthesis, ferrocyanide compounds can be formed having a layered structure, for example, the ferrocyanide 2Co2[Fe (CN)6] K4 [Fe(CN)6] 3H2O [5][6][7]9]. Polyhydroxo complexes of polyvalent metals (Al 3+ , Fe 3+ , Cr 3+ , Zr 4+ , La 3+ , etc.)…”

Preparation and Catalytic Performance of Fe-Cr-Si-Pillared Montmorillonite as Coal Liquefaction Catalyst

“…Although iron oxides are widely used as catalysts in a number of catalytic processes, especially in coal liquefaction, iron oxides pillared clays are seldom reported. Therefore, studies on synthesis and property of iron oxides pillared clays deserve more attention [7]. Simultaneous hydrolysis of two metal ions of different natures can affect the composition and dimensions of the hydroxycations, and the creation of multielement pillars can enhance the thermal stability of the pillared clays.…”

“…Simultaneous hydrolysis of two metal ions of different natures can affect the composition and dimensions of the hydroxycations, and the creation of multielement pillars can enhance the thermal stability of the pillared clays. Much interest and attention have been focused on heteronuclear polyhydroxocomplexes in recent years [7]. The SiO 2 sol mixed with other metal ions was a good pillaring agent, because it's large size and good thermal stability [8].…”