Effect of Lignin Structure Characteristics on the Performance of Lignin Based Phenol Formaldehyde Adhesives

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: 45(9)

Published: Feb. 20, 2024

Abstract As the second most abundant biopolymer, lignin remains underutilized in various industrial applications. Various forms of generated from different methods affect its physical and chemical properties to a certain extent. To promote broader commercial utilization currently available lignins, sulfonate (SL), kraft (KL), organosolv (OL) are utilized partially replace phenol synthesis formaldehyde (PF) adhesives. The impact production process on effectiveness lignin‐based phenolic (LPF) adhesives is examined based structural analysis selected lignin. results show that OL has more hydroxyl groups, lower molecular weight, greater number reactive sites than other two types lignins. maximum replacement rate by reaches 70% w/w, resulting (OLPF) with viscosity 960 mPa·s, minimal free content 0.157%, shear strength 1.84 MPa. It exhibits better performance compared meets requirements national standards.

Language: Английский

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Molecular characterization of organic aerosol particles from biomass pyrolysis

Journal of Analytical and Applied Pyrolysis, Journal Year: 2024, Volume and Issue: 178, P. 106393 - 106393

Published: Feb. 8, 2024

Language: Английский

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Involvement of Acid-Leachable Inorganics in Pyrolysis of Pig Manure

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(14), P. 13039 - 13049

Published: June 29, 2024

Pig manure is a typical solid waste, which features high content of inorganics. These inorganics might be involved in thermochemical conversion pig manure, and this was investigated herein by pyrolysis leached with varied concentrations H2SO4 (0.5–6 mol L–1) at 600 °C. The removal acid-leachable [CaCO3, Ca3(PO4)2, alkaline oxides, etc.] exposed more acidic sites derived from the like SiO2. This enhanced production gases expense bio-oil. Furthermore, aromatization secondary condensation reactions were also promoted, increasing not only yield char (from 29.6 to 39.7%, on an organic basis) but carbon 16.1% (blank sample) 26.2% (leached 6 L–1 H2SO4). Leaching partial rendered sufficient contact interaction between organics, facilitating charring matter. further retained skeleton for generation micropores, capability resulting adsorption phenol. In situ infrared analysis indicated presence abundant oxygen-containing functionalities carbonaceous species after leaching treatment, favoring occurrence reactions.

Language: Английский

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Catalytic pyrolysis mechanism of lignin moieties driven by aldehyde, hydroxyl, methoxy, and allyl functionalization: the role of reactive quinone methide and ketene intermediates

Green Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The catalytic pyrolysis of guaiacol-based lignin monomers, vanillin, syringol, and eugenol over commercial HZSM-5 has been investigated using

Language: Английский

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Green approach on pretreatment of rice straw using deep eutectic solvent for lignin recovery and efficient hydrolysis

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: May 3, 2024

Language: Английский

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Thermal Reactivity of Bio-Oil Produced from Catalytic Fast Pyrolysis of Biomass

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(20), P. 19626 - 19638

Published: Oct. 1, 2024

Catalytic fast pyrolysis (CFP) of biomass is a versatile thermochemical process for producing biogenic oil that can be further upgraded to sustainable transportation fuels, chemicals, and materials. CFP exhibits reduced oxygen content improved thermal stability compared noncatalytic oil. However, some level reactive oxygenates remain in oils, reactions between these species result molecular weight growth increased viscosity, leading the potential challenges during transportation, storage, downstream processing. Previous research has provided considerable insight into reactivity but oils have yet studied similar fashion. Consequently, degree catalytic upgrading necessary effectively stabilize established, little known about mechanistic details underlying process. The current study addresses this knowledge gap by controlling reaction conditions systematically vary resulting Accelerated studies were then performed, analyzed using gas chromatography-mass spectrometry (GC-MS), Fourier transform ion cyclotron mass (FT-ICR MS), gel permeation chromatography (GPC), viscometry evaluate impact heating on their physical chemical properties. results revealed short chain carbonyls, anhydrosugars, lignin derivatives with conjugated vinyl groups likely play role oils. Additionally, experiments performed across wide variety feedstocks relatively low contents <20 wt %. above threshold value, grew exponentially as function content, large increases viscosity weight. These serve deepen understanding help inform development quality specifications

Language: Английский

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Carbon dioxide-mediated catalytic pyrolysis of lignin in syngas production

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 139786 - 139786

Published: Jan. 1, 2025

Language: Английский

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Sugarcane biorefinery: Unlocking the potential of the pyrolytic process to convert waste biomasses into value-added products

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 318, P. 118913 - 118913

Published: Aug. 10, 2024

Language: Английский

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Growth and Suppression of Polycyclic Aromatic Hydrocarbon Precursors in Lignin Pyrolysis: Molecular Beam Studies

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Language: Английский

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Impact of CO2 on the Pyrolysis of Mixed Polymer Wastes into Combustible Fuel: A Case Study for Footwear Waste

Journal of Analytical and Applied Pyrolysis, Journal Year: 2024, Volume and Issue: 183, P. 106810 - 106810

Published: Oct. 1, 2024

Language: Английский

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