A new procedure for the destructuring of vegetable matter at atmospheric pressure by a catalyst/solvent system of formic acid/acetic acid.Applied to the pulping of triticale straw

Lam, Hoang Quoc; Bigot, Y. Le; Delmas, M.; Avignon, Gérard

doi:10.1016/s0926-6690(01)00077-2

Cited by 41 publications

(7 citation statements)

References 5 publications

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“…This process affords lignins with a high degree of purity. Several organic solvents were used, such as methanol, phenol 1,4-dioxane, ethanol, formic acid, and acetic acid. − The last process, i.e., the CIMV process, allows the destructuring of the vegetable matter at atmospheric pressure by a catalyst–solvent system of formic acid/acetic acid/water to produce a white lignin. , Some other chemical (such as solvent extraction) or physical processes are also developed but rarely at an industrial scale.…”

Section: Biobased Building Blocksmentioning

confidence: 99%

Biobased Thermosetting Epoxy: Present and Future

et al. 2013

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Section: Biobased Building Blocksmentioning

confidence: 99%

Biobased Thermosetting Epoxy: Present and Future

et al. 2013

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“…Pathak et al reported 97% hemicellulose, 95% lignin removal and 86% cellulose retention from sugarcane tops at 125 °C for 90 min with 85% FA at a solvent-to-solid ratio of 7.5 29 . Lam et al 30 optimized the fractionation of rice straw in FA in terms of acid concentration, temperature and cooking time. A delignification rate of 85% and a pulp yield of 44.4% were obtained by 60 min treatment in 90% FA at 100 °C.…”

Section: Resultsmentioning

confidence: 99%

Renewable and high-purity hydrogen from lignocellulosic biomass in a biorefinery approach

Elsaddik,

Nzihou,

Delmas

et al. 2024

Sci Rep

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Unprecedented efforts are being deployed to develop hydrogen production from bioresources in a circular economy approach, yet their implementation remains scarce. Today’s Challenges are associated with the shortage in the value chain, lack of large-scale production infrastructure, high costs, and low efficiency of current solutions. Herein, we report a hydrogen production route from cellulose pulp, integrating biomass fractionation and gasification in a biorefinery approach. Softwood sawdust undergoes formic acid organosolv treatment to extract cellulose, followed by steam gasification. High-purity hydrogen-rich syngas at a concentration of 56.3 vol% and a yield of 40 gH2/kgcellulose was produced. Char gasification offers the advantage of producing free-tar syngas reducing cleaning costs and mitigating downstream issues. A comprehensive assessment of mass and energy balance along the hydrogen value chain revealed an efficiency of 26.5% for hydrogen production, with an energy requirement of 111.1 kWh/kgH2. Optimizing solvent recovery and valorization of other constituents as added-value products in a biorefinery approach would further improve the process and entice its industrial takeoff.

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“…The signal at 1,595 cm −1 corresponded to the quantity of the phenyl-propane skeleton present in the samples ( Dominguez-Robles et al, 2017 ). The vibrations at 1,121–1,213 cm −1 corresponded to the C-O stretching of the syringyl (S) and guaiacyl (G) units ( Quoc Lam et al, 2001 ). The peaks at 1,030 and 1,031 cm −1 were associated with the C–O vibrations ( Oliveira et al, 2009 ).…”

Section: Resultsmentioning

confidence: 99%

Solvothermal-Based Lignin Fractionation From Corn Stover: Process Optimization and Product Characteristics

et al. 2021

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Fractionation of lignocellulosic is a fundamental step in the production of value-added biobased products. This work proposes an initiative to efficiently extract lignin from the corn stover using a single-step solvothermal fractionation in the presence of an acid promoter (H2SO4). The organic solvent mixture used consists of ethyl acetate, ethanol, and water at a ratio of 30: 25:45 (v/v), respectively. H2SO4 was utilized as a promoter to improve the performance and selectivity of lignin removal from the solid phase and to increase the amount of recovered lignin in the organic phase. The optimal conditions for this extraction, based on response surface methodology (RSM), are a temperature of 180°C maintained for 49.1 min at an H2SO4 concentration of 0.08 M. The optimal conditions show an efficient reaction with 98.0% cellulose yield and 75.0% lignin removal corresponding to 72.9% lignin recovery. In addition, the extracted lignin fractions, chemical composition, and structural features were investigated using Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis, and two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance spectroscopy (2D-HSQC NMR). The results indicate that the recovered lignin primarily contains a β-O-4 linking motif based on 2D-HSQC spectra. In addition, new C–C inter-unit linkages (i.e., β-β, and β-5) are not formed in the recovered lignin during H2SO4-catalyzed solvothermal pretreatment. This work facilitates effective valorization of lignin into value-added chemicals and fuels.

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A new procedure for the destructuring of vegetable matter at atmospheric pressure by a catalyst/solvent system of formic acid/acetic acid.Applied to the pulping of triticale straw

Cited by 41 publications

References 5 publications

Biobased Thermosetting Epoxy: Present and Future

Biobased Thermosetting Epoxy: Present and Future

Renewable and high-purity hydrogen from lignocellulosic biomass in a biorefinery approach

Solvothermal-Based Lignin Fractionation From Corn Stover: Process Optimization and Product Characteristics

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