Results 11 to 20 of about 44,482 (297)

Lignin Stabilization and Carbohydrate Nature in H-transfer Reductive Catalytic Fractionation: The Role of Solvent Fractionation of Lignin Oil in Structural Profiling. [PDF]

open access: yesChemSusChem, 2023
Reductive Catalytic Fractionation (RCF) of lignocellulosic materials produces lignin oil rich in monomer products and high-quality cellulosic pulps. RCF lignin oil also contains lignin oligomers/polymers and hemicellulose-derived carbohydrates.
Rinken R, Posthuma D, Rinaldi R.
europepmc   +2 more sources

Challenges and Perspective of Recent Biomass Pretreatment Solvents

open access: yesFrontiers in Chemical Engineering, 2021
The increased demands on renewable and sustainable products require enhancing the current conversion efficiency and expanding the utilization of biomass from a single component (i.e., cellulose) to entire biomass components in the biorefinery concept ...
Kwang Ho Kim   +3 more
doaj   +1 more source

Isolation and Fractionation of the Tobacco Stalk Lignin for Customized Value-Added Utilization

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
The value-added utilization of tobacco stalk lignin is the key to the development of tobacco stalk resources. However, the serious heterogeneity is the bottleneck for making full use of tobacco stalk lignin.
Zhi Chang Liu   +25 more
doaj   +1 more source

Lignin Valorization for Added-Value Chemicals: Kraft Lignin versus Lignin Fractions

open access: yesChemEngineering, 2023
Lignin is a raw material that can potentially be converted into valuable compounds through depolymerization reactions in addition to its use as a polymer or material.
Carina A. E. Costa   +3 more
doaj   +1 more source

Valorization of Lignin via Oxidative Depolymerization with Hydrogen Peroxide: Towards Carboxyl-Rich Oligomeric Lignin Fragments

open access: yesMolecules, 2020
The extraction and characterization of defined and carboxyl-rich oligomeric lignin fragments with narrow molecular weight distribution is presented herein.
Ulrike Junghans   +5 more
doaj   +1 more source

Role and importance of solvents for the fractionation of lignocellulosic biomass

open access: yesBioresource Technology, 2023
Lignocellulosic biomass is one of the most important renewable materials to replace carbon-based fossil resources. Solvent-based fractionation is a promising route for fractionation of biomass into its major components. Processing is governed by the employed solvent-systems properties.
Paulsen Thoresen P.   +4 more
openaire   +3 more sources

Identification of Phytochemicals from the Water Extract of Eurycoma longifolia Roots using Solid-Liquid and Liquid-Liquid Extraction Based Fractionation Techniques

open access: yesActa Chimica Slovenica, 2021
Phytochemicals in the water extract of Eurycoma longofolia roots were identified using both solid-liquid and liquid-liquid extraction based fractionation techniques.
Lee Suan Chua   +2 more
doaj   +1 more source

Study on Specific Carbon Isotope Fractionation of n-Alkanes during Column Chromatography Separation-Molecular Sieve Complexation Adsorption

open access: yesYankuang ceshi, 2021
BACKGROUND Before analyzing the carbon isotopes of n-alkanes by gas chromatography-gas isotope mass spectrometry (GC-IRMS), it is necessary to pre-separate and enrich n-alkanes and isoparaffins in saturated hydrocarbon samples. Whether the carbon isotope
DONG Hao-wei   +6 more
doaj   +1 more source

Gravitational Field-Flow Fractionation Devices Fabricated via a Hot Embossing/Thermal Bonding Method

open access: yesMicromachines, 2014
A novel hot embossing/low temperature ethanol solvent bonding method for the fabrication of polymethylmethacrylate (PMMA) field flow fractionation devices has been developed.
Kaijun Yang
doaj   +1 more source

Modelling and experimental study of separators for co-solvent recovery in a supercritical extraction process [PDF]

open access: yes, 2006
Co-solvent recovery in supercritical extraction is addressed here through a theoretical description of the behaviour of a CO2 + co-solvent mixture into a cascade of cyclonic separators, such as those existing in conventional fractionation processes based
Camy, Séverine   +1 more
core   +1 more source

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