Compositional and structural feedstock requirements of a liquid phase cellulose-to-naphtha process in a carbon- and hydrogen-neutral biorefinery context

Deneyer, Aron; Ennaert, Thijs; Cavents, Guillaume; Dijkmans, Jan; Vanneste, Johan; Courtin, Christophe M.; Dusselier, Michiel; Sels, Bert F.

doi:10.1039/c6gc01644h

Cited by 22 publications

(15 citation statements)

References 118 publications

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“…Similar type of a modified Ru/C catalyst is also found to be effective in a liquid phase cellulose-to-naphtha process. 99 The effect of cellulose characteristics, such as purity, crystallinity, degree of polymerisation, and particle size (surface area) was also studied towards production of light naphtha. The direct conversion of hemicellulose in pubescens to g-valerolactone was successfully carried out without using external hydrogen over a Pt/C catalyst, coupled with AlCl 3 -H 2 O and AlCl 3 -SiO 2 -THF/H 2 O systems.…”

Section: Conventional Carbon Based Catalystsmentioning

confidence: 99%

Functionalised heterogeneous catalysts for sustainable biomass valorisation

et al. 2018

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Efficient transformation of biomass to value-added chemicals and high-energy density fuels is pivotal for a more sustainable economy and carbon-neutral society. In this framework, developing potential cascade chemical processes using functionalised heterogeneous catalysts is essential because of their versatile roles towards viable biomass valorisation. Advances in materials science and catalysis have provided several innovative strategies for the design of new appealing catalytic materials with well-defined structures and special characteristics. Promising catalytic materials that have paved the way for exciting scientific breakthroughs in biomass upgrading are carbon materials, metal-organic frameworks, solid phase ionic liquids, and magnetic iron oxides. These fascinating catalysts offer unique possibilities to accommodate adequate amounts of acid-base and redox functional species, hence enabling various biomass conversion reactions in a one-pot way. This review therefore aims to provide a comprehensive account of the most significant advances in the development of functionalised heterogeneous catalysts for efficient biomass upgrading. In addition, this review highlights important progress ensued in tailoring the immobilisation of desirable functional groups on particular sites of the above-listed materials, while critically discussing the role of consequent properties on cascade reactions as well as on other vital processes within the bio-refinery. Current challenges and future opportunities towards a rational design of novel functionalised heterogeneous catalysts for sustainable biomass valorisation are also emphasized.

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Section: Conventional Carbon Based Catalystsmentioning

confidence: 99%

Functionalised heterogeneous catalysts for sustainable biomass valorisation

et al. 2018

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“…Ford et al applied supercritical methanol (573-593 K at 160-220 bar) in the presence of a copper-doped porous metal oxide to produce substituted cyclohexyl alcohols and ethers from lignin and acyclic C 2 -C 6 alcohols and ethers from the carbohydrate fraction [255,256]. Alternatively, specific acid-redox catalytic systems (e.g., TSA + ht-Ru/C [257,258], Pt/NbOPO 4 [259]) achieve the production of gasoline-range alkanes via extensive depolymerization and hydrodeoxygenation of both lignin and (hemi)cellulose components at relatively mild temperatures of 463-493 K. Interestingly, the alkane product mixture is likely suitable for fuel applications without additional separation steps. In other cases, the cost-efficiency of a one-pot process should always be considered against the costs, related to a potentially more difficult product separation.…”

Section: Reductive One-pot Processingmentioning

confidence: 99%

Catalytic Strategies Towards Lignin-Derived Chemicals

et al. 2018

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Lignin valorization represents a crucial, yet underexploited component in current lignocellulosic biorefineries. An alluring opportunity is the selective depolymerization of lignin towards chemicals. Although challenged by lignin's recalcitrant nature, several successful (catalytic) strategies have emerged. This review provides an overview of different approaches to cope with detrimental lignin structural alterations at an early stage of the biorefinery process, thus enabling effective routes towards lignin-derived chemicals. A first general strategy is to isolate lignin with a better preserved native-like structure and therefore an increased amenability towards depolymerization in a subsequent step. Both mild process conditions as well as active stabilization methods will be discussed. An alternative is the simultaneous depolymerization-stabilization of native lignin towards stable lignin monomers. This approach requires a fast and efficient stabilization of reactive lignin intermediates in order to minimize lignin repolymerization and maximize the envisioned production of chemicals. Finally, the obtained lignin-derived compounds can serve as a platform towards a broad range of bio-based products. Their implementation will improve the sustainability of the chemical industry, but equally important will generate opportunities towards product innovations based on unique biobased chemical structures.

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“…A combined production of H 2 and PHB is a major advantage for environmentally friendly technology in utilizing solar energy bioconversion and in turning industrial and sewage wastes into alternative sources of energy and recyclable plastics (Khatipov et al, 1998). In the biorefinery process, the production of biological hydrogen is an important challenge, in light of a 100% renewability criterion (Deneyer et al, 2016). In Fig.…”

Section: Combined Production Of Phb and Hmentioning

confidence: 99%

Hydroxytyrosol rich-mixture from olive mill wastewater and production of green products by feeding Rhodopseudomonas sp. S16-FVPT5 with the residual effluent

Carlozzi

Seggiani

Capperucci

et al. 2019

Journal of Biotechnology

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This study disserts on the exploitation of olive mill wastewater (OMW) for the production of both bio-based polyβ-hydroxybutyrate (PHB) and hydrogen (H 2) by using the residual effluent as feedstock for growing purple bacteria after the recovery of hydroxytyrosol-rich mixtures. In particular, Rhodopseudomonas sp. S16-FVPT5 was fed with either the virgin OMW or dephenolized-OMW (d-OMW). For polyphenols removal, the OMW was treated with activated carbon; subsequently, acidified ethanol (pH = 3.1) at 50°C was used as extractor solvent for obtaining hydroxytyrosol-rich mixtures. The maximum hydroxytyrosol content in the resultant polyphenolic mixture was 2.02 g/L. The highest co-production of PHB (315 mg PHB/L) and H 2 (2236 mL H 2 /L) were achieved feeding Rhodopseudomonas sp. S16-FVPT5 with pure d-OMW. The highest hydrogen yield (4.55 L(H 2)/L d-OMW) was obtained feeding the bacterium with d-OMW, diluted at 25%; by increasing the content of d-OMW into the culture broth the hydrogen yield progressively decreased. Lower results were obtained by feeding the bacterium with a synthetic medium, the cumulative hydrogen was 1855 mL H 2 /L); the PHB was 101 mg PHB/L. The highest theoretical light conversion efficiency was 2.36% with the synthetic medium and 1.99% when feeding Rhodopseudomonas sp. S16-FVPT5 with d-OMW diluted with water 50%, v/v.

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Compositional and structural feedstock requirements of a liquid phase cellulose-to-naphtha process in a carbon- and hydrogen-neutral biorefinery context

Abstract: Towards a carbon- and hydrogen-neutral liquid phase cellulose-to-naphtha process.

Cited by 22 publications

References 118 publications

Functionalised heterogeneous catalysts for sustainable biomass valorisation

Functionalised heterogeneous catalysts for sustainable biomass valorisation

Catalytic Strategies Towards Lignin-Derived Chemicals

Hydroxytyrosol rich-mixture from olive mill wastewater and production of green products by feeding Rhodopseudomonas sp. S16-FVPT5 with the residual effluent

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