Alumina supported bimetallic Pt–Fe catalysts applied to glycerol hydrogenolysis and aqueous phase reforming

Formation of closed mesopores in boehmite during the phase transformation of gibbsite under hydrothermal conditions

“…Boehmite is formed by the incorporation of crystal-forming complexes during the interaction of mononuclear anions [Al(OH) 4 ]with the surface layers of gibbsite [22,23]. Those are formed during the dehydration and intensive stratification of gibbsite crystals along the (001) plane and its hydroxylation, which is seen from the analysis of IR-spectra of the samples in the region of interlayer (m(OH) = 3528 cm -1 ) and terminal (m(OH) = 3624 cm -1 ) stretching vibrations of hydroxyl groups located on the (001) plane ( Fig.…”

“…With those closed mesopores, it possible to use boehmite in various fields of chemistry and technology for the encapsulation and transport of solutions containing the active components and connections. ().,-volV) (0123456789().,-volV) Boehmite (c-AlOOH) is an important mesoporous [1] material; due to the high specific surface, pore volume and presence of mesopores it is used as adsorbent [2], catalyst carrier [3], and intermediate phase in the production of alumina carriers, petrochemical and petroleum processing catalysts [4], membranes and filters [5], a component of toothpastes, enveloping and adsorbing agents in medicine. The parameters of the mesoporous system determine the adsorptive capacity of boehmite with respect to toxic organic and inorganic compounds in the wastewater treatment and in solving environmental problems [6].The dimensions of the crystals and the way they are packaged are very important for the functional materials obtained from boehmite; they affect its porous system, the temperatures of phase transitions into aluminum oxides.…”

Hydrodeoxygenation of glycerol with in situH2 formation over Pt catalysts supported on Fe modified Al2O3: effect of Fe loading

“…For glycerol hydrogenolysis under external H 2 supply the addition of Fe on Pt/Al 2 O 3 had a positive effect both in activity and in selectivity towards 1,2‐propanediol, while the opposite trend was observed under inert atmosphere, with H 2 formation via glycerol APR . Moreover, Pt/Fe‐Al 2 O 3 catalyst proved efficient for the tandem reaction cycle of glycerol hydrodeoxygenation – ethanol APR, in terms of 1,2‐propanediol productivity …”

Hydrogenolysis of glycerol to 1,2‐propanediol in a continuous flow trickle bed reactor

“…The catalytic hydrogenolysis of Gly to 1,2‐PDO is now being recognized as a green and sustainable process for production of propanediols, compared with the traditional and industrially established petroleum‐based route of hydration of propylene oxide . Until now a lot of effort has been devoted to developing an efficient hydrogenolysis process , , . The reaction of Gly hydrogenolysis is usually supposed to proceed by either the dehydration of Gly to acetol (AOL) over acid sites followed by the hydrogenation of AOL on metal sites to 1,2‐PDO , …”

“…9 Until now a lot of effort has been devoted to developing an efficient hydrogenolysis process. 4,6,[9][10][11] The reaction of Gly hydrogenolysis is usually supposed to proceed by either the dehydration of Gly to acetol (AOL) over acid sites followed by the hydrogenation of AOL on metal sites to 1,2-PDO. 6,9 Depending on operating conditions and catalyst, different types of compounds can be obtained from Gly.…”