Journal ArticleDOI
Hydrogenolysis of glycerol over homogenously dispersed copper on solid base catalysts
TLDR
In this paper, the authors synthesized a bi-functional highly dispersed Cu-solid base catalyst for hydrogenolysis of aqueous glycerol using thermal decomposition of the as-synthesized Cu0.4Mg5.6Al2(OH)16CO3 layered double hydroxides.Abstract:
Homogenously dispersed copper on layered solid base (Cu0.4/Mg5.6Al2O8.6-CP, with 80.1% dispersion of copper) was synthesized via thermal decomposition of the as-synthesized Cu0.4Mg5.6Al2(OH)16CO3 layered double hydroxides. This bi-functional highly dispersed Cu-solid base catalyst is extremely effective for hydrogenolysis of aqueous glycerol. The detected conversion of glycerol reached 80.0% with a 98.2% selectivity of 1,2-propanediol at 180 °C, 3.0 MPa H2 and 20 h. But copper dispersed poorly in those catalysts prepared via impregnation and ion-exchange, and their activities were lower. These precursors and catalysts were characterized by N2-adsorption, X-ray diffraction, scanning electronic microscope, transmission electronic microscope, thermo-gravimetry, temperature-programmed reduction with H2, in-situ XRD, dissociative N2O adsorption and CO2 temperature-programmed desorption. It was confirmed that the as-synthesized Cu0.4Mg5.6Al2(OH)16CO3 showed a well crystallized layer-structure of hydrotalcite and copper dispersed homogenously on the layer-structure of hydrotalcite after thermal decomposition and H2 reduction.read more
Citations
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Conversion of Biomass into Chemicals over Metal Catalysts
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Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide
Ali Jawad,Kun Zhan,Haibin Wang,Ajmal Shahzad,Zehua Zeng,Jia Wang,Xinquan Zhou,Habib Ullah,Zhulei Chen,Zhuqi Chen +9 more
TL;DR: In this paper, the authors reported that magnesium oxides (MgO) in CuOMgO/Fe3O4 not only enhanced the catalytic properties but also switched the free radical peroxymonosulfate (PMS)-activated process into the 1O2 based nonradical process.
Journal ArticleDOI
Renewable Chemicals: Dehydroxylation of Glycerol and Polyols
Jeroen ten Dam,Ulf Hanefeld +1 more
TL;DR: To yield suitable renewable chemicals these natural products need to be defunctionalized by means of dehydroxylation, here the possible approaches are reviewed and evaluated from a fundamental chemical aspect.
Journal ArticleDOI
Influence of Zr on the performance of Cu/Zn/Al/Zr catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol
Peng Gao,Feng Li,Haijuan Zhan,Ning Zhao,Fukui Xiao,Wei Wei,Liangshu Zhong,Hui Wang,Yuhan Sun +8 more
TL;DR: In this article, a series of Cu/Zn/Al/Zr hydrotalcite-like precursors with Zr4+:(Al3++Zr4+) from 0 to 0.7 were synthesized by a co-precipitation method.
Journal ArticleDOI
Highly Dispersed Copper over β-Mo2C as an Efficient and Stable Catalyst for the Reverse Water Gas Shift (RWGS) Reaction
Xiao Zhang,Xiaobing Zhu,Lili Lin,Siyu Yao,Mengtao Zhang,Xi Liu,Xiaoping Wang,Yong-Wang Li,Chuan Shi,Ding Ma +9 more
TL;DR: In this article, a 1 wt% Cu/β-Mo2C catalysts were optimized for the reverse water gas shift (RWGS) reaction, which showed that the strong interaction between Cu and Mo2C effectively promotes the dispersion of supported copper and prevents the aggregation of Cu particles, which accounts for the extraordinary activity and stability.
References
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Journal ArticleDOI
Hydrotalcite-type anionic clays: Preparation, properties and applications.
Journal ArticleDOI
Physico-chemical properties of synthetic hydrotalcites in relation to composition
TL;DR: Ahstraet et al. as discussed by the authors used coprecipitation followed by hydrothermal treatment between 150 ~ and 250~C. Based on the structural formula [Mgl_xAlx(OH)~lX+l(COz)x/2 �9 mH20] x-, pure solid solutions were formed in the range Al/(Al + Mg) = 0.2 to 0.33, where m = (1 - 3x/ 2).
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Handbook of Layered Materials
TL;DR: In this article, Carrado et al. proposed a molecular model of Clay Mineral Structure and Surface Chemistry, S.-H. Park and G.C. Carrado Molecular Modeling of ClayMineral Structure and surface chemistry, S. Park et al., S.A. Durand, L.-J. Espinal, L.G. Villegas, and S.M. Lagaly
Journal ArticleDOI
Hydrogenolysis of glycerol over carbon-supported Ru and Pt catalysts
Erin P. Maris,Robert J. Davis +1 more
TL;DR: In this article, commercial carbon-supported Ru and Pt catalysts were evaluated in the batchwise hydrogenolysis of glycerol in aqueous solution at 473 K and 40 bar H2, with and without added base.
Journal ArticleDOI
Activation of Mg-Al hydrotalcite catalysts for aldol condensation reactions
TL;DR: In this article, the condensation of benzaldehyde and acetone to aldol has been investigated in the liquid phase at 273 K on hydrotalcites transformed into basic solids by activation following different procedures.
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