Water-mediated catalytic hydrodeoxygenation of biomass

Zhang, Zaiman; Li, Hao

doi:10.1016/j.fuel.2021.122242

Cited by 21 publications

(12 citation statements)

References 137 publications

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“…Lignocellulosic biomass is the most abundant form of biomass with an annual production of around 170 billion metric tons. − Lignin, cellulose, and hemicellulose are three primary components of lignocellulosic biomass (Figure a). Especially, cellulose and hemicellulose are the polymers of C5 and C6 sugars, and both have achieved industrial applications owing to relatively simple structures. − In contrast, lignin is a complex cross-linked phenolic polymer with a three-dimensional spatial structure, which makes its application a tremendous challenge. ,,− Nevertheless, despite the complex structure, advantageously, the abundance of aromatic features of lignin represents a preferable prospect to possess a great potential source for the preparation of various functional chemicals. − At present, a feasible and generally researched strategy for lignin upgrading is first to depolymerize lignin into phenolic compounds, followed by catalytic hydrodeoxygenation (HDO) to obtain value-added bulk chemicals (Figure b). − …”

Section: Introductionmentioning

confidence: 99%

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

Lang

2022

ACS Sustainable Chem. Eng.

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Arenes are an important class of intermediates in the chemical industry that have been widely applied in pharmaceuticals, fuels, synthetic resins, and so on. Given the growing demand for arenes and the unsustainability of petroleum-based production pathways, hydrodeoxygenation (HDO) of lignin-derived phenolic compounds presents a promising strategy for translating lignin materials into value-added arenes. Whereas most HDO catalysts perform low selectivity in arenes due to the presence of competing processes that more readily saturate the aromatic rings, in this Perspective, we first focus on the latest advances in the sustainable production of arenes from the HDO of phenolic compounds. Furthermore, the newest achievements of different types of catalysts and their reaction mechanisms involved in the HDO processes are systematically classified and summarized. Lastly, the existing challenges, tentative suggestions for improvement, and future opportunities within this attractive field are given with the aim of providing new research ideas and stimulating inspiration for a wide range of scientists to drive toward a sustainable and carbon-neutral society where biomass resources play a major role in fuels and chemicals.

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Section: Introductionmentioning

confidence: 99%

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

Lang

2022

ACS Sustainable Chem. Eng.

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“…Various pentanediols such as 1,2-, 1,4- and 1,5-isomers can be synthesized from biomass, via furfural (1,2-, 1,4- and 1,5-) 237,238 or levulinic acid (1,4-). 238,239 Among these three isomers, 1,4-pentanediol is the best substrate for dehydration to conjugated 1,3-pentadiene because this dehydration does not involve a hydride shift. Dehydration of 1,5-pentanediol has been more intensively investigated; however, the target product is usually 4-penten-1-ol.…”

Section: Specific Productsmentioning

confidence: 99%

A perspective on catalytic production of olefinic compounds from biomass

2023

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“…Considering these complications, current research in this field is focused on the design of highly efficient and low-cost catalysts. Recently, there have been review articles describing the activity of various catalytic materials in HDO. ,,,,,,,,,− …”

Section: Catalytic Hydrodeoxygenationmentioning

confidence: 99%

“…Although temperature shows a positive effect on the kinetics, a higher temperature can also lead to catalyst deactivation through sintering and coke deposition. Being exothermic, hydrogen adsorption on the catalyst surface decreases at a temperature beyond the optimum value, which results in suppressing the hydrogenation activity and alters the product distribution. ,, The hydrogen partial pressure is another critical parameter that affects the HDO process. Typically, hydrogenation is favored at high H 2 partial pressures, while deoxygenation occurs at low H 2 partial pressure and high temperatures.…”

Section: Catalytic Hydrodeoxygenationmentioning

confidence: 99%

Catalytic Hydrodeoxygenation of Lignin-Derived Oxygenates: Catalysis, Mechanism, and Effect of Process Conditions

2021

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The high oxygen content of pyrolysis bio-oil with many organic functional groups in it limits its direct application as a blendstock. The upgradation of biomass-derived oxygenates into renewable fuels and value-added chemicals via catalytic hydrodeoxygenation (HDO) has received considerable attention in recent years. This review focuses on HDO of key model compound oxygenates, which sets the ground to propose the overall reaction mechanism of HDO of bio-oils. Catalysts play a vital role in HDO, and its design poses many challenges because of different reactions involved such as hydrogenolysis, hydrogenation, decarbonylation, and dehydration occurring simultaneously at different catalyst-active sites. The main objective here is to present a comprehensive introduction to the reaction mechanism involved in the HDO of bio-oil model oxygenates. For this, a thorough discussion of different reaction pathways taking place during the HDO of five model oxygenates, viz., anisole, guaiacol, eugenol, vanillin, and dibenzofuran, is presented. The model compounds are selected to provide a good description of the HDO of lignin-derived compounds present in bio-oils. Particular emphasis is placed on the effect of the catalyst, temperature, hydrogen partial pressure, and solvent employed on the product distribution. This review will aid not just in understanding the interrelations between the nature of the catalyst, HDO mechanism, and product distribution but will also provide thoughtful directions for the applications of HDO in real bio-oil upgradation.

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Water-mediated catalytic hydrodeoxygenation of biomass

Cited by 21 publications

References 137 publications

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

A perspective on catalytic production of olefinic compounds from biomass

Catalytic Hydrodeoxygenation of Lignin-Derived Oxygenates: Catalysis, Mechanism, and Effect of Process Conditions

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