Advances on the fast pyrolysis of biomass for the selective preparation of phenolic compounds

Hu, Bin; Zhang, Zhenxi; Xie, Wen-luan; Liu, Ji; Li, Yang; Zhang, Wenming; Fu, Hao; Lü, Qiang

doi:10.1016/j.fuproc.2022.107465

Cited by 66 publications

(15 citation statements)

References 184 publications

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“…No simple trend has been noted for the behavior of acidic metal oxides (alumina, silica and alumina-silica) in biomass pyrolysis. The strength and quantity of acidic sites can lead to the selectivity of aromatic compounds, anhydrosugars and furans [13,[100][101][102]. In general, the use of acidic metal oxide alters the distribution of the liquid product, while decreasing its yield.…”

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

“…Metal oxides have been used in both in situ and ex situ pyrolysis of biomass, aiming to selectively obtain high-added value in chemicals for industry, such as phenolic compounds, ketones and furans [101]. Table 2 shows some examples of these systems.…”

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

“…Catalysts based on basic and transition metal oxides are the most suitable for the production of phenolic compounds due to their basic characteristics [101]. However, the production of phenols or any other value-added chemical compound depends not only on the catalyst, but also on the pyrolysis conditions (temperature, reactor, residence time) and biomass characteristics [101].…”

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

“…Transition metal oxides also have acid-base characteristics in addition to redox properties. Examples of transition metal oxides are zinc oxide, nickel oxide, zirconia oxide, iron oxide, niobium oxide and ceria oxide, among others [100][101][102]110]. Although it is not possible to describe a unique behavior for this class, there is a tendency that the higher the acidity/basicity ratio, the more favorable the catalyst will be to catalyze dehydration, depolymerization, C-C or C-O cleavage and ring-opening reactions.…”

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

“…This set of reactions contributes to the reduction of anhydrous sugars and the increase of aldehydes, furans and aliphatic hydrocarbons. Higher acidity catalysts have also exhibited a positive effect on aromatics [38,125] and phenolics formation [101]. Oxides based on cerium, chromium, iron, manganese and vanadium have multiple valences, and can be partially reduced to generate oxygen vacancies, which play important roles in polymerization reactions.…”

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

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Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Rangel

Mayer

Carvalho

et al. 2023

Biomass

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The pyrolysis of lignocellulosic biomass is a promising technology for obtaining renewable chemicals and fuels to replace fossil-based products. However, due to the complexity of the lignin, cellulose and hemicellulose molecules, a large variety of compounds are often formed, making commercial implementation difficult. The use of a catalyst during reactions has been recognized as one of the major improvements in pyrolysis, allowing the production of selected compounds. Moreover, the large number of available catalysts opens up a wide range of possibilities for controlling the reaction network. Zeolites, hierarchical zeolites, alkali and alkaline earth oxides, transition metals and carbonaceous materials, among others, have been investigated in the pyrolysis of a variety of biomasses. In addition, bifunctional catalysts play a role in pyrolysis, as well as the addition of plastics as hydrogen donors. This review aims to present and discuss in detail state-of-the-art catalytic pyrolysis, focusing on the relationships between the properties of the catalysts and the obtained products. A guideline for selecting catalysts for lignocellulosic biomass is also provided.

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Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

Section: Acidic and Basic Metal Oxide Catalystsmentioning

confidence: 99%

See 3 more Smart Citations

Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Rangel

Mayer

Carvalho

et al. 2023

Biomass

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Materials, fuels, upgrading, economy, and life cycle assessment of the pyrolysis of algal and lignocellulosic biomass: a review

et al. 2023

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Climate change issues are calling for advanced methods to produce materials and fuels in a carbon–neutral and circular way. For instance, biomass pyrolysis has been intensely investigated during the last years. Here we review the pyrolysis of algal and lignocellulosic biomass with focus on pyrolysis products and mechanisms, oil upgrading, combining pyrolysis and anaerobic digestion, economy, and life cycle assessment. Products include oil, gas, and biochar. Upgrading techniques comprise hot vapor filtration, solvent addition, emulsification, esterification and transesterification, hydrotreatment, steam reforming, and the use of supercritical fluids. We examined the economic viability in terms of profitability, internal rate of return, return on investment, carbon removal service, product pricing, and net present value. We also reviewed 20 recent studies of life cycle assessment. We found that the pyrolysis method highly influenced product yield, ranging from 9.07 to 40.59% for oil, from 10.1 to 41.25% for biochar, and from 11.93 to 28.16% for syngas. Feedstock type, pyrolytic temperature, heating rate, and reaction retention time were the main factors controlling the distribution of pyrolysis products. Pyrolysis mechanisms include bond breaking, cracking, polymerization and re-polymerization, and fragmentation. Biochar from residual forestry could sequester 2.74 tons of carbon dioxide equivalent per ton biochar when applied to the soil and has thus the potential to remove 0.2–2.75 gigatons of atmospheric carbon dioxide annually. The generation of biochar and bio-oil from the pyrolysis process is estimated to be economically feasible.

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Insight into the selective separation of CO2 from biomass pyrolysis gas over metal-incorporated nitrogen-doped carbon materials: a first-principles study

Zhao,

Liu,

et al. 2024

Front. Chem. Sci. Eng.

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Advances on the fast pyrolysis of biomass for the selective preparation of phenolic compounds

Cited by 66 publications

References 184 publications

Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Selecting Catalysts for Pyrolysis of Lignocellulosic Biomass

Materials, fuels, upgrading, economy, and life cycle assessment of the pyrolysis of algal and lignocellulosic biomass: a review

Insight into the selective separation of CO2 from biomass pyrolysis gas over metal-incorporated nitrogen-doped carbon materials: a first-principles study

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