Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

Sun, Zhuohua; Bottari, Giovanni; Afanasenko, Anastasiia; Stuart, Marc C. A.; Deuss, Peter J.; Fridrich, Bálint; Barta, Katalin

doi:10.1038/s41929-017-0007-z

Cited by 428 publications

(337 citation statements)

References 55 publications

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“…For example, phenols may be obtained by specific hydrogenolysis of lignin or lignite. Currently, this compound is an important basic organic synthetic raw material in the chemical industry and is widely used in plastics, synthetic fibers, pharmaceuticals, pesticides, and dye intermediates . However, because of the structural complexity and variability of lignite, lignite‐related model compounds are widely studied to disclose the mechanisms for lignite depolymerization into small molecules .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Kinetics and Activity of Ni‐Based Catalysts for Benzyl Phenyl Ether Catalytic Hydrogenolysis

et al. 2019

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The influence of the type of support [activated carbon (AC), HZSM‐5, and γ‐Al2O3] on the performance of Ni‐based catalysts for the catalytic hydrogenolysis (CH) of benzyl phenyl ether (BPE) is investigated. The properties of an Ni‐based catalyst are investigated using diverse characterization techniques. An Ni/AC catalyst exhibits the highest dispersion of Ni atoms by CO pulse. The kinetic studies show that the apparent activation energies (Ea) for CH of BPE increase in the order Ea (Ni/AC) < Ea (Ni/γ‐Al2O3) < Ea (Ni/HZSM‐5), and the initial turnover frequencies follow the order of Ni/AC (64 mol molNisurf −1 h−1) > Ni/γ‐Al2O3 (58 mol molNisurf −1 h−1) > Ni/HZSM‐5 (45 mol molNisurf −1 h−1). All these results prove that the CH activity of BPE is significantly affected by the type of support, and Ni/AC is the highest activity catalyst in CH of the C—O bond of BPE. Toluene and phenol are major products in CH of BPE at a relatively low hydrogen pressure and high temperature. Based on catalytic experiments, a reaction mechanism is proposed, which provides the theoretical basis for converting lignite into high‐value organic molecules.

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Section: Introductionmentioning

confidence: 99%

Comparison of Kinetics and Activity of Ni‐Based Catalysts for Benzyl Phenyl Ether Catalytic Hydrogenolysis

et al. 2019

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“…[62] The convergent pathways usually require deoxygenation and hydrogenation to obtain saturated chains and deoxygenateda romatic structures. The utility of ethanol as a solventp rovides an environmentally friendly approacht oo vercome lignocellulose recalcitrance and obtain attractive depolymerized structures that are the precursors of fuel substituents and functionalized chemicals.…”

Section: Discussionmentioning

confidence: 99%

“…[62] This concept of full conversion of the whole biomass could be adopted in future studies on catalytic biomass deconstruction reactions in ethanol. For example, Sun et al recently designed an integrated catalystr ecycling system to obtain amine and alkane precursors from biomass deconstruction products in alcoholic solvent.…”

Section: Discussionmentioning

confidence: 99%

Ethanol: A Promising Green Solvent for the Deconstruction of Lignocellulose

et al. 2018

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Growing energy demand, environmental impact, energy security issues, and rural economic development have encouraged the development of sustainable renewable fuels. Nonfood lignocellulosic biomass is a suitable source for sustainable energy because the biomass feedstocks are low cost, abundant, and carbon neutral. Recent thermochemical conversion studies are frequently directed at converting biomass into high-quality liquid fuel precursors or chemicals in a single step. Supercritical ethanol has been selected as a promising solvent medium to deconstruct lignocellulosic biomass because ethanol has extraordinary solubility towards lignocellulosic biomass and can be resourced from cellulosic ethanol facilities. This review provides a critical insight into both catalytic and noncatalytic strategies of lignocellulose deconstruction. In this context, the supercritical ethanol deconstruction pathways are thoroughly reviewed; GC-MS, 1D and 2D NMR spectroscopy, and elemental analysis strategies towards liquid biomass deconstruction products are also critically presented. This review aims to provide readers a broad and accurate roadmap of novel biomass to biofuel conversion techniques.

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“…Process like WAO for commercial production of vanillin has few improved for more than 80 years, which limited its market share. For breakthrough, it is urgent to study creatively new strategies, such as stabilization of lignin, selective oxidation, fermentation, lignin‐first, integrated utilization of lignocellulose, new catalysis systems and new types of catalyst instead of carbon supported noble metal based catalysts ,,,,. It should be emphasized that sometimes a homogeneous catalysis system, which is neglected in recent studies, may be more suitable than a heterogeneous one because of the poor mass transfer between the undissolved lignin particles and heterogeneous catalysts.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

Promising Techniques for Depolymerization of Lignin into Value‐added Chemicals

Ren

et al. 2018

ChemCatChem

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As the world's second most renewable resource, lignin has been studied for depolymerization into useful chemicals and fuels for many years. However, although good results were achieved in laboratory tests, it is difficult to apply those techniques into industrial production. One of the main obstacles is the costly separation tasks of complex degradation products, as reflected from the case of industrial production of vanillin from lignin. In this article, we introduce and discuss the degradation strategies and products that are potential for lignin depolymerization into valuable chemicals on a commercial scale. Based on the viewpoint of not only conversion and yield but also the complexity of degradation products, five categories of products and corresponding processes are recommended as more promising chemicals for industrial production in the near future.

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Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

Cited by 428 publications

References 55 publications

Comparison of Kinetics and Activity of Ni‐Based Catalysts for Benzyl Phenyl Ether Catalytic Hydrogenolysis

Comparison of Kinetics and Activity of Ni‐Based Catalysts for Benzyl Phenyl Ether Catalytic Hydrogenolysis

Ethanol: A Promising Green Solvent for the Deconstruction of Lignocellulose

Promising Techniques for Depolymerization of Lignin into Value‐added Chemicals

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