Ceria-Based Mixed Oxide Supported CuO: An Efficient Heterogeneous Catalyst for Conversion of Cellulose to Sorbitol

Dar, Bashir Ahmad; Khalid, Syed Haroon; Wani, Tariq Ahmad; Mir, Mushtaq Ahmad; Farooqui, Mazahar

doi:10.4236/gsc.2015.51003

Cited by 12 publications

(6 citation statements)

References 42 publications

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“…In addition, it has also been used for various extensive applications. Ceria (CeO 2 ) and ceria-based composite oxides have found application in many areas such as water–gas shift reactions, cracking of hydrocarbons, pollution emission control for automobiles as a three-way catalyst (TWC), soot combustion, alcohol fuel cells, oxidation of alcohols and organic compounds, , and conversion of heavy organic molecules . Also, it has been used for many other processes such as steam reforming, biomedical applications, synthesis gas production, and dehydration of alcohols.…”

Section: Introductionmentioning

confidence: 99%

“…Ceria (CeO 2 ) and ceria-based composite oxides have found application in many areas such as water−gas shift reactions, 2 cracking of hydrocarbons, 3 pollution emission control for automobiles as a three-way catalyst (TWC), 4 soot combustion, 5 alcohol fuel cells, 6 oxidation of alcohols and organic compounds, 7,8 and conversion of heavy organic molecules. 9 Also, it has been used for many other processes such as steam reforming, biomedical applications, 10 synthesis gas production, and dehydration of alcohols. Cerium exists in two oxidation states of Ce 3+ (ionic radius, 1.14 Å) and Ce 4+ (ionic radius, 0.97 Å), highlighting its redox (reduction− oxidation) properties.…”

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confidence: 99%

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Iron- and Cobalt-Doped Ceria–Zirconia Nanocomposites for Catalytic Cracking of Naphtha with Regenerative Capability

et al. 2017

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Series of nanosized iron-and cobalt-doped ceria−zirconia nanocomposites were prepared using a hydrothermal synthesis technique at 180 °C for 24 h, with the successful novel incorporation of both Co and Fe on ceria−zirconia, for n-hexane catalytic cracking. Effects of dopant ions on the improvement of intrinsic properties of ceria−zirconia nanocomposites were investigated using disparate characterization techniques. The synthesized ceria−zirconia nanocomposites exhibited similar X-ray diffraction (XRD) patterns, indicating full fusion of the metal ions into the ceria−zirconia lattice structure. The synthesized nanocomposite catalysts were tested for n-hexane cracking over 10 h time-on-stream, with no previous study or report for catalytic cracking of hexane via ceria−zirconia nanocomposites. Relatively high ethylene and propylene selectivity (both >62%) was obtained over CZ, FeCoCZa, and FeCoCZb over time-on-stream. Comparatively, the best catalytic activity and stability was exhibited by FeCoCZa with higher n-hexane conversion. Temperature and catalyst weight per feed flow rate (W/F) variations were investigated using the best catalyst (FeCoCZa). Higher conversions were obtained at higher temperature and lower W/F but with varied product selectivity and yield, over time-on-stream. In addition, the spent catalysts were successfully regenerated after catalytic testing via calcination at 600 °C for 4 h and reused for two additional cycles.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Iron- and Cobalt-Doped Ceria–Zirconia Nanocomposites for Catalytic Cracking of Naphtha with Regenerative Capability

et al. 2017

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“…The catalyst based on CuO (a catalytic phase) and the CeO 2 -ZrO 2 support has showed exceptional efficiency: 99.1% selectivity to sorbitol at 92% of the cellulose conversion (245°C, 5.2 MPa, 4 h) in the neutral medium (Dar et al, 2015). Moreover, the catalyst was stable during five consecutive catalytic reactions.…”

Section: Cellulose Hydrolytic Hydrogenationmentioning

confidence: 99%

Cellulose Conversion Into Hexitols and Glycols in Water: Recent Advances in Catalyst Development

et al. 2019

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Conversion of biomass cellulose to value-added chemicals and fuels is one of the most important advances of green chemistry stimulated by needs of industry. Here we discuss modern trends in the development of catalysts for two processes of cellulose conversion: (i) hydrolytic hydrogenation with the formation of hexitols and (ii) hydrogenolysis, leading to glycols. The promising strategies include the use of subcritical water which facilitates hydrolysis, bifunctional catalysts which catalyze not only hydrogenation, but also hydrolysis, retro-aldol condensation, and isomerization, and pretreatment (milling) of cellulose together with catalysts to allow an intimate contact between the reaction components. An important development is the replacement of noble metals in the catalysts with earth-abundant metals, bringing down the catalyst costs, and improving the environmental impact.

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“…Since that time, extensive research has been devoted to enhancing process selectivity toward target polyols, through improved catalyst design and/or by carefully selecting optimal reaction conditions ( Matthiesen et al, 2014 ). An assortment of materials have been tested as catalytic supports, including acid zeolites ( Geboers et al, 2011 ; Negoi et al, 2014 ), metal oxides such as silica ( Reyes-Luyanda et al, 2012 ), alumina ( Kobayashi et al, 2011 ), and ceria-based mixed oxides ( Dar et al, 2015 ) or carbon materials ( Wang et al, 2012a ; Han and Lee, 2012 ; Park et al, 2013 ; Zhao et al, 2015 ). Generally, the use of graphitic materials has several catalytic advantages over other options, such as hydrothermal stability, mechanical strength, large surface area, and tunable surface chemistry ( Navalon et al, 2016 ; Hu et al, 2017 ; Ribeiro et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Design of highly active Ni catalysts supported on carbon nanofibers for the hydrolytic hydrogenation of cellobiose

et al. 2022

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The direct transformation of cellulose into sugar alcohols (one-pot conversion) over supported nickel catalysts represents an attractive chemical route for biomass valorization, allowing the use of subcritical water in the hydrolysis step. The effectiveness of this process is substantially conditioned by the hydrogenation ability of the catalyst, determined by design parameters such as the active phase loading and particle size. Herein, mechanistic insights into catalyst design to produce superior activity were outlined using the hydrolytic hydrogenation of cellobiose as a model reaction. Variations in the impregnation technique (precipitation in basic media, incipient wetness impregnation, and the use of colloidal-deposition approaches) endowed carbon-nanofiber-supported catalysts within a wide range of Ni crystal sizes (5.8–20.4 nm) and loadings (5–14 wt%). The link between the properties of these catalysts and their reactivity has been established using characterization techniques such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and inductively coupled plasma-optical emission spectroscopy (ICP-OES). A fair compromise was found between the Ni surface area (3.89 m2/g) and its resistance against oxidation for intermediate crystallite sizes (∼11.3 nm) loaded at 10.7 wt%, affording the hydrogenation of 81.2% cellobiose to sorbitol after 3 h reaction at 190°C and 4.0 MPa H2 (measured at room temperature). The facile oxidation of smaller Ni particle sizes impeded the use of highly dispersed catalysts to reduce the metal content requirements.

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Ceria-Based Mixed Oxide Supported CuO: An Efficient Heterogeneous Catalyst for Conversion of Cellulose to Sorbitol

Cited by 12 publications

References 42 publications

Iron- and Cobalt-Doped Ceria–Zirconia Nanocomposites for Catalytic Cracking of Naphtha with Regenerative Capability

Iron- and Cobalt-Doped Ceria–Zirconia Nanocomposites for Catalytic Cracking of Naphtha with Regenerative Capability

Cellulose Conversion Into Hexitols and Glycols in Water: Recent Advances in Catalyst Development

Design of highly active Ni catalysts supported on carbon nanofibers for the hydrolytic hydrogenation of cellobiose

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