Structured catalysts for biofuels transformation into syngas with active components based on perovskite and spinel oxides supported on Mg-doped alumina

Sadykov, Vladіslav; Pavlova, Svetlana; Smal, Ekaterina; Arapova, Marina; Simonov, Mikhail; Mezentseva, Natalia; Rogov, Vladimir A.; Glazneva, Tatiana S.; Lukashevich, Anton I.; Roger, Anne‐Cécile; Parkhomenko, Ksenia; Veen, A.C. van; Smorygo, Oleg

doi:10.1016/j.cattod.2017.05.055

Cited by 15 publications

(19 citation statements)

References 56 publications

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“…Specific surface area of perovskites prepared via Pechini method is in the range of 10-15 m 2 /g, which is too small for their good performance as active components of structured catalysts. To deal with this problem perovskites were loaded on Mg-doped γ-Al2O3 [90] or mesoporous MgAl2O4 prepared by self-assembly method induced by evaporation (EISA) with copolymer Pluronic P123 [78].…”

Section: Mesoporous Nanocompositesmentioning

confidence: 99%

“…Even though for (Ru + Ni)-promoted doped MnCr2O4 spinels specific surface areas were reasonably high (~100 m 2 /g), to improve their sintering resistance these active components were loaded on Mg-doped γ-Al2O3 as well [90].…”

Section: Mesoporous Nanocompositesmentioning

confidence: 99%

“…This includes high resolution transmission electron microscopy with elemental mapping, diffraction studies using X-ray synchrotron radiation and neutron diffraction, wide-angle X-ray scattering (WAXS), infrared and Raman spectroscopies. This allowed to elucidate effects of samples chemical composition and preparation procedures on their phase homogeneity, spatial cations distribution in particles, types and concentrations of defects and features of local coordination environment of Ce and Zr cations [73,77,[89][90][91][92][93][94][95][96][97][98]. For Ce0.5Zr0.5O2-y composition having the highest oxygen mobility, doping with La, Gd, Pr, Sm cations (thus producing Lnx(Ce0.5Zr0.5)1-xO2-y oxides with x =0.1÷0.3) stabilizes the pseudo-cubic structure in humid environment and reduces domain sizes.…”

Section: Structural Featuresmentioning

confidence: 99%

“…Oxides with a spinel structure based on MnCr2O4 prepared by Pechini method [69,90] have 2-40% of admixture phase with corundum structure due to segregation of (Mn,Cr)2O3 oxide during annealing in air. Doping with Fe and Zn cations as well as supporting Ru + Ni decrease the content of this admixture due to spinel structure stabilization.…”

Section: Structural Featuresmentioning

confidence: 99%

“…After supporting up to 10 wt.% of spinel, fluorite or perovskite oxides on MgAl2O4 or 10 wt.% Mg-doped γ-Al2O3 followed by supporting Ru + Ni by impregnation when required, epitaxial layers of these oxides are formed along with incorporation of rare-earth and transition metal cations into the surface layers of these supports [78,90]. In reducing conditions Ni-Ru alloy nanoparticles are formed strongly interacting with layers of rare-earth or transition metal oxides on the surface of these high surface area supports [78,90].…”

Section: Structural Featuresmentioning

confidence: 99%

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Modern Trends in Design of Catalysts for Transformation of Biofuels into Syngas and Hydrogen: From Fundamental Bases to Performance in Real Feeds

et al. 2021

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This review considers problems related to design of efficient structured catalysts for natural gas and biofuels transformation into syngas. Their active components are comprised of fluorite, perovskite and spinel oxides or their nanocomposites (both bulk and supported on high surface area Mg-doped alumina or MgAl2O4) promoted by platinum group metals, nickel and their alloys. A complex of modern structural, spectroscopic and kinetic methods was applied to elucidate atomic-scale factors controlling their performance and stability to coking, such as dispersion of metals/alloys, strong metal-support interaction and oxygen mobility/reactivity as dependent upon their composition and synthesis procedures. Monolithic catalysts comprised of optimized active components loaded on structured substrates with a high thermal conductivity demonstrated high activity and stability to coking in processes of natural gas and biofuels reforming into syngas. A pilot-scale axial reactor equipped with the internal heat exchanger and such catalysts allowed to efficiently convert into syngas the mixture of natural gas, air and liquid biofuels in the autothermal reforming mode at low (~50–100 °C) inlet temperatures and GHSV up to 40,000 h−1.

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Section: Mesoporous Nanocompositesmentioning

confidence: 99%

Section: Mesoporous Nanocompositesmentioning

confidence: 99%