Continuous Flow Upgrading of Selected C₂–C₆Platform Chemicals Derived from Biomass

Chemical Reviews, Год журнала: 2020, Номер 120(15), С. 7219 - 7347

Опубликована: Июль 15, 2020

The ever increasing industrial production of commodity and specialty chemicals inexorably depletes the finite primary fossil resources available on Earth. forecast population growth over next 3 decades is a very strong incentive for identification alternative other than petro-based ones. In contrast with resources, renewable biomass virtually inexhaustible reservoir chemical building blocks. Shifting current paradigm from almost exclusively to bio-based raw materials requires more vibrant political messages; it profound revision concepts technologies which processes rely. Only small fraction molecules extracted bears significant commercial potentials be considered as ubiquitous platforms upon new, industry can thrive. Owing its inherent assets in terms unique process experience, scalability, reduced environmental footprint, flow chemistry arguably has major role play this context. This review covers selection C2 C6 existing markets including polyols (ethylene glycol, 1,2-propanediol, 1,3-propanediol, glycerol, 1,4-butanediol, xylitol, sorbitol), furanoids (furfural 5-hydroxymethylfurfural) carboxylic acids (lactic acid, succinic fumaric malic itaconic levulinic acid). aim illustrate various aspects upgrading platform toward or using new that fall under umbrella continuous technology could change future perspectives biorefineries.

Язык: Английский

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Recent Advances in the Catalytic Depolymerization of Lignin towards Phenolic Chemicals: A Review

ChemSusChem, Год журнала: 2020, Номер 13(17), С. 4296 - 4317

Опубликована: Июль 14, 2020

Abstract The efficient valorization of lignin could dictate the success 2 nd generation biorefinery. Lignin, accounting for on average a third lignocellulosic biomass, is most promising candidate sustainable production value‐added phenolics. However, structural alteration induced during isolation often depleting its potential chemicals. Recently, catalytic reductive depolymerization has appeared to be and effective method obtain phenolic monomers. present study systematically summarizes far‐reaching state‐of‐the‐art strategies different stages, including conventional technical lignin, emerging fractionation protolignin, stabilization inhibit undesired condensation reactions, further upgrading lignin‐derived Finally, challenges future researches possible solutions are proposed.

Язык: Английский

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Dual-Functional Photocatalysis for Simultaneous Hydrogen Production and Oxidation of Organic Substances

ACS Catalysis, Год журнала: 2019, Номер 9(5), С. 4247 - 4270

Опубликована: Март 22, 2019

The present review showcases the scientific progress in field of dual-functional photocatalysis for hydrogen evolution coupled with oxidation chemical substances. Considering that is a promising alternative to fossil fuels, photocatalytic water splitting represents an approach produce using abundant solar energy. However, industrialization this process has not occurred yet, mainly due limitations related high cost, toxicity, poor stability, or low efficiency majority systems employed reduction. An tackle these by taking advantage oxidative energy holes and replacing expensive often toxic sacrificial electron donors either organic pollutants (targeting their degradation) substances can be oxidized added-value products. Following 2-fold strategy, production sustainable accompanied degradation valorization processes, single process. Herein, detailed overview advancements dual-purpose offered, along discussion basic principles, differences between similar fields, how distinguished. Although its infancy, technology received radically increasing interest over past few years; expected, as utilization overcome multiple major environmental challenges, such global warming, scarcity, pollution.

Язык: Английский

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Homogeneous and heterogeneous catalysts for hydrogenation of CO₂ to methanol under mild conditions

Chemical Society Reviews, Год журнала: 2021, Номер 50(7), С. 4259 - 4298

Опубликована: Янв. 1, 2021

This review summarizes the concepts, mechanisms, drawbacks and challenges of state-of-the-art catalysis for CO₂ to MeOH under mild conditions. Thoughtful guidelines principles future research are presented discussed.

Язык: Английский

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Metal organic frameworks for biomass conversion

Chemical Society Reviews, Год журнала: 2020, Номер 49(11), С. 3638 - 3687

Опубликована: Янв. 1, 2020

This review narrates the recent developments on catalytic applications of pristine metal–organic frameworks (MOFs), functionalized MOFs, guests embedded over MOFs and derived carbon composites for biomass conversion into platform chemicals.

Язык: Английский

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Applications of Magnetic Nanomaterials in Heterogeneous Catalysis

ACS Applied Nano Materials, Год журнала: 2019, Номер 2(8), С. 4681 - 4697

Опубликована: Авг. 5, 2019

Magnetic nanomaterials show promising applications in heterogeneous catalysis because of their ease separation and good reusability. The magnetization saturation values magnetic nanoparticles mainly depend on finite-size surface effects. For small nanoparticles, the formation domain walls provides a high energy state particles aggregate easily clusters or clumps. To avoid agglomeration, can be coated with different shells (e.g., silica, carbon, metal, metal oxide, polymer) to isolate them from external environments. Because area many active species supported enhance catalytic activity. This review focuses recent developments various catalysis, including hydrogenation reaction, Suzuki–Miyaura oxidation chiral enzyme photocatalysis, electrocatalysis, photoelectrochemical catalysis. Different synthesis strategies for are summarized. sites, stability, mechanisms discussed. Challenges perspectives commercial documented.

Язык: Английский

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Multi-scale complexities of solid acid catalysts in the catalytic fast pyrolysis of biomass for bio-oil production – A review

Progress in Energy and Combustion Science, Год журнала: 2020, Номер 80, С. 100852 - 100852

Опубликована: Июнь 5, 2020

Язык: Английский

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Catalytic fast pyrolysis of lignocellulosic biomass: Critical role of zeolite catalysts

Renewable and Sustainable Energy Reviews, Год журнала: 2021, Номер 139, С. 110707 - 110707

Опубликована: Янв. 18, 2021

Язык: Английский

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Dual-Metal Hetero-Single-Atoms with Different Coordination for Efficient Synergistic Catalysis

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(39), С. 16068 - 16077

Опубликована: Сен. 23, 2021

Rationally tailoring the coordination environments of metal single atoms (SAs) is an effective approach to promote their catalytic performances, which, however, remains as a challenge date. Here, we report novel misplaced deposition strategy for fabrication differently coordinated dual-metal hetero-SAs. Systematic characterization results imply that as-synthesized hetero-SAs (exemplified by Cu and Co) are affixed hierarchical carbon support via Cu-C4 Co-N4 bonds. Density functional theory studies reveal strong synergistic interactions between asymmetrically deployed CuC4 CoN4 sites lead remarkably polarized charge distributions, i.e., electron accumulation deficiency around sites, respectively. The obtained CuC4/CoN4@HC catalyst exhibits significantly enhanced capability in substrate adsorption O2 activation, achieving superior performances oxidative esterification aromatic aldehydes comparison with Cu- Co-based SA counterparts.

Язык: Английский

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Valorisation of crude glycerol to value-added products: Perspectives of process technology, economics and environmental issues

Biotechnology Reports, Год журнала: 2020, Номер 27, С. e00487 - e00487

Опубликована: Июнь 13, 2020

The enormous production of glycerol, a waste stream from biodiesel industries, as low-value product has been causing threat to both the environment and economy. Therefore, it needs be transformed effectively efficiently into valued products for contributing positively towards It can either converted directly competent chemicals or used feedstock/precursor deriving valuable derivatives. In this review article, technical evaluation stirred up, various factors technologies producing value-added crude Environmental economic aspects different conversion routes, cost challenges integration routes biorefinery have reviewed elaborated. There are tremendous environmental benefits in glycerol via biochemical route, residue become eco-friendly. However, chemical conversions faster processes, economically viable if partially ignored.

Язык: Английский

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