Homogeneous Catalysts for the Hydrodeoxygenation of Biomass-Derived Carbohydrate Feedstocks

Schlaf, Marcel

doi:10.1007/978-981-287-769-7_2

Cited by 7 publications

(6 citation statements)

References 82 publications

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“…In theory, both hetero- and homogeneous catalysts can be used, but since the pioneering work of Schiavo et al [ 50 ] heterogeneous systems have dominated research and development. Although homogeneous catalysts have some advantages over heterogeneous catalysts in terms of catalyst deactivation in the HDO of sugars, sugar alcohols, and their condensates, homogeneous systems also confront unique obstacles in the design of ligands, catalysts, and processes [ 51 ]. Since water is an important byproduct of acid-catalysed dehydration steps, the complexes to be used as homogeneous catalysts must be resistant to water and an acidic environment [ 52 ].…”

Section: Hdo Of Biomass-derived Oxygenates On Homogeneous Catalystsmentioning

confidence: 99%

Green catalyst for clean fuel production via hydrodeoxygenation

YÜCEL,

DONAR,

ERGENEKON

et al. 2023

Turkish Journal of Chemistry

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The development of new fuel sources to replace nonrenewable fossil fuels has received substantial attention due to the ongoing demand for fossil fuels. Biomass and raw waste materials are crucial sources to produce suitable alternative fuels instead of nonrenewable fuels and offer a greener approach. Therefore, improving the fuel properties of biooils produced from the thermochemical conversion of biomass and raw waste materials is critical as it is used as an alternative to nonrenewable fuel. Developing an economical and eco-friendly method to produce sustainable and renewable oil by improving biooil containing large amounts of phenolic compounds has become imperative. One of the most intriguing and promising technologies for refining biooil to produce renewable fuels of comparable quality to conventional fossil fuels is the hydrodeoxygenation (HDO)-based process for converting biooil to renewable fuels. This method is almost one of the best improving methods described in the literature. At this point, it is of great importance that the HDO process is carried out catalytically. Carbon materials are preferred for both designing catalysts for HDO and supporting metal nanoparticles by providing chemically inert surfaces and tunable functional groups, high surface area and active sites. The HDO of biomass and raw waste materials has significantly advanced thanks to carbon-based catalysts. In this review, the effect of the surface character and catalytic ability of the carbon support, especially prepared by the green synthesis technique, on the HDO reaction during biooil improvement is discussed. Moreover, HDO reaction parameters and recent studies have been investigated in depth. Thus, green carbon catalysts’ role in clean fuel production via the HDO process has been clarified.

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Section: Hdo Of Biomass-derived Oxygenates On Homogeneous Catalystsmentioning

confidence: 99%

Green catalyst for clean fuel production via hydrodeoxygenation

YÜCEL,

DONAR,

ERGENEKON

et al. 2023

Turkish Journal of Chemistry

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“…Depending on reaction conditions, the ruthenium system with 0.1 mol% loading, leads to 2,5-HD (69% at 175 The HDO of highly polar and reactive sugar-derived furans forces the use of a polar liquid reaction medium, such as H2O. The high temperatures used for this process (>150 °C) are required to trigger any dehydration or hydrolysis steps [167].…”

Section: Hydrodeoxygenation Of Furanicsmentioning

confidence: 99%

Homogeneous Catalyzed Valorization of Furanics: A Sustainable Bridge to Fuels and Chemicals

2021

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The development of efficient biomass valorization is imperative for the future sustainable production of chemicals and fuels. Particularly, the last decade has witnessed the development of a plethora of effective and selective transformations of bio-based furanics using homogeneous organometallic catalysis under mild conditions. In this review, we describe some of the advances regarding the conversion of target furanics into value chemicals, monomers for high-performance polymers and materials, and pharmaceutical key intermediates using homogeneous catalysis. Finally, the incorporation of furanic skeletons into complex chemical architectures by multifunctionalization routes is also described.

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“…This prompts us to attempt the development of homogeneous catalysts for HDO reactions of carbohydrates and their derivatives, which mayfor some reactions and under certain conditions, notably in the aqueous phaseoffer alternatives, or even advantages, to heterogeneous catalyst systems. − Homogeneous catalyst systems do, however, also suffer from their own intrinsic and far from trivial challenges: empirically, the Brønsted and/or Lewis acid-catalyzed dehydration of (poly-)alcohols and/or hydrolysis ring-opening of biomass-derived furans in polar reaction media as the first step of an HDO reaction cascade typically require T ≥ 150 °C; that is, any homogeneous system must fulfill the unusual requirement of being soluble, stable, and active at this temperature in aqueous acidic media as water is at least a necessary byproduct of HDO reactions and ideally one or the only component of the solvent system employed. A further desirable property of an ideal homogeneous catalyst would be (long-term) air stability of both the constituent ligands and the homogeneous catalyst complex itself.…”

Section: Introductionmentioning

confidence: 99%

Conversion of Furfural Derivatives to 1,4-Pentanediol and Cyclopentanol in Aqueous Medium Catalyzed by trans-[(2,9-Dipyridyl-1,10-phenanthroline)(CH₃CN)₂Ru](OTf)₂

et al. 2020

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The complex trans-[(2,9-dipyridyl-1,10phenanthroline)(CH 3 CN) 2 Ru](OTf) 2 was synthesized and tested as a homogeneous hydrodeoxygenation catalyst for the conversion of biomass-derived furfuryl alcohol and furfuryl acetate to 1,4pentanediol (as the primary target compound) and cyclopentanol (formed by the competing Piancatelli rearrangement) in aqueous reaction medium at elevated temperature (150−200 °C) and hydrogen pressure (800 psi = 5.12 MPa). Catalytic reactions using furfuryl alcohol as a substrate were limited by the formation of solid resins with the product yields showing a strong negative correlation with increasing substrate concentration and maximum yields of 1,4-pentanediol and cyclopentanol being 23 and 41%, respectively. A two-level full factorial design of experiments study with four independent input variables (temp., time, [cat.],[substrate]) and a center point was carried out for the conversion of furfuryl acetate, showing good reproducibility between replicates and no humin formation. This enabled a full statistical analysis of the input variable impact on product distribution and yield. The maximum yields of 1,4-pentanediol and cyclopentanol using furfuryl acetate as a substrate are 68 and 35%, respectively. The decreased self-reactivity of furfuryl acetate versus furfuryl alcohol dramatically increases the yields of target products but still shows a strong negative correlation of the yield of the desired products with increasing substrate concentration.

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Homogeneous Catalysts for the Hydrodeoxygenation of Biomass-Derived Carbohydrate Feedstocks

Cited by 7 publications

References 82 publications

Green catalyst for clean fuel production via hydrodeoxygenation

Green catalyst for clean fuel production via hydrodeoxygenation

Homogeneous Catalyzed Valorization of Furanics: A Sustainable Bridge to Fuels and Chemicals

Conversion of Furfural Derivatives to 1,4-Pentanediol and Cyclopentanol in Aqueous Medium Catalyzed by trans-[(2,9-Dipyridyl-1,10-phenanthroline)(CH₃CN)₂Ru](OTf)₂

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Homogeneous Catalysts for the Hydrodeoxygenation of Biomass-Derived Carbohydrate Feedstocks

Cited by 7 publications

References 82 publications

Green catalyst for clean fuel production via hydrodeoxygenation

Green catalyst for clean fuel production via hydrodeoxygenation

Homogeneous Catalyzed Valorization of Furanics: A Sustainable Bridge to Fuels and Chemicals

Conversion of Furfural Derivatives to 1,4-Pentanediol and Cyclopentanol in Aqueous Medium Catalyzed by trans-[(2,9-Dipyridyl-1,10-phenanthroline)(CH3CN)2Ru](OTf)2

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Conversion of Furfural Derivatives to 1,4-Pentanediol and Cyclopentanol in Aqueous Medium Catalyzed by trans-[(2,9-Dipyridyl-1,10-phenanthroline)(CH₃CN)₂Ru](OTf)₂