DRY biorefineries: Multiscale modeling studies and innovative processing

Mayer‐Laigle, Claire; Barakat, Abdellatif; Barron, Cécile; Delenne, Jean‐Yves; Frank, Xavier; Mabille, Frédéric; Rouau, Xavier; Sadoudi, Abdelkrim; Samson, Marie-Françoise; Lullien-Pellerin, Valérie

doi:10.1016/j.ifset.2017.08.006

Cited by 26 publications

(14 citation statements)

References 60 publications

(44 reference statements)

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“…In this case, a sorting step (sieving, air classification, or electrostatic separation) can be added to the process diagram. The technologies that can be used and some examples of utilization for lignocellulosic biomass have been reported by Mayer-Laigle et al in 2017 [ 66 ].…”

Section: Discussion: Choice Of Milling Equipmentmentioning

confidence: 99%

Comminution of Dry Lignocellulosic Biomass: Part II. Technologies, Improvement of Milling Performances, and Security Issues

et al. 2018

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Lignocellulosic feedstocks present a growing interest in many industrial processes as they are an ecological alternative to petroleum-based products. Generally, the size of plant raw materials needs to be reduced by milling step(s), to increase density, facilitate transport and storage, and to increase reactivity. However, this unit operation can prove to be important in term of investments, functioning costs, and energy consumption if the process is not fully adapted to the histological structure of the plant material, possibly challenging the profitability of the whole chain of the biomass conversion. In this paper, the different technologies that can be used for the milling of lignocellulosic biomass were reviewed and different avenues are suggested to improve the milling performances thanks to thermal pretreatments. Based on examples on wheat straw milling, the main points to take into consideration in the choice of a milling technologies have been highlighted in regards to the specifications of ground powder. A specific focus on the hazards associated to the milling and the manipulation of fine biomass particles is also realized at the end of the paper from the perspective of industrial applications.

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Section: Discussion: Choice Of Milling Equipmentmentioning

confidence: 99%

Comminution of Dry Lignocellulosic Biomass: Part II. Technologies, Improvement of Milling Performances, and Security Issues

et al. 2018

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“…To explore this hypothesis, dry fractionation was carried out to try to obtain fractions with speci c tissue enrichment from leaves, pith, or rind. The particle size obtained in the fractions is not only the result of the e ciency of the grinder but is also due to interactions between plant structures and mechanical loading modes developed in the grinder [43]. The particle size could thus re ect differences in grinding ability in relation to the mechanical properties of the tissues.…”

Section: Exploring Variability Of Maize Shoot Powdermentioning

confidence: 99%

“…It is mainly grown for the grain so the stalk biomass can be used for biofuel production. Dry fractionation was applied to obtain fractions that differ in their physical state and composition [43]. In addition to the chemical composition of the maize stalks and corresponding fractions, the present work focused on the physical-chemical properties of particles: original particle size distribution, speci c surface area, and porosity.…”

Section: Introductionmentioning

confidence: 99%

Enzymatic Degradation of Maize Shoots: Monitoring of Chemical and Physical Changes Reveals Different Saccharification Behaviors

Barron

Devaux

Foucat

et al. 2020

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Background The recalcitrance of lignocellulosics to enzymatic saccharification has been related to many factors, including the tissue and molecular heterogeneity of the plant particles. The role of tissue heterogeneity generally assessed from plant sections is not easy to study on a large scale. In the present work, dry fractionation of ground maize shoot was performed to obtain particle fractions enriched in specific tissue or molecules. The degradation profiles of the fractions were compared considering physical changes in addition to chemical conversion.Results Coarse, medium and fine fractions were produced using a dry process followed by an electrostatic separation. The physical and chemical characteristics of the fractions varied, suggesting enrichment in tissue from leaves, pith or rind. The fractions were subjected to seven hours of enzymatic hydrolysis in a torus reactor designed for real-time monitoring of the number and size of the particles. Saccharification efficiency was monitored by analyzing the sugar content of hydrolysate samples collected at different times. The lowest and highest saccharification yields were measured in the coarse and fine fractions, respectively, and these yields paralleled the reduction in the size and number of particles. The behavior of the positively- and negatively-charged particles of medium-size fractions was contrasted. Although the amount of sugar release was similar, the changes in particle size and number differed during enzymatic degradation. The reduction in the number of particles proceeded faster than that of particle size, suggesting that degradable particles were degraded to the point of disappearance with no significant erosion or fragmentation. Considering all fractions, the saccharification yield was positively correlated with the amount of water associated with [5-15 nm] pore size range at 67% moisture content while the reduction in the number of particles was inversely correlated with the amount of lignin. Lignin could act in maintaining the macroscopic structure of particles without necessarily prohibitive effects on the accessibility of enzymes to their substrates.Conclusion Real-time monitoring of sugar release and changes in the number and size of the particles clearly evidenced different degradation patterns for fractions of maize shoot that could be related to tissue heterogeneity in the plant.

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“…The authors have shown that four populations (≤1 μm, ≈20 μm, ≈100 μm, ≈500 μm) appear during the milling steps. However, shear generated by the high shear mill and the pin-mill is more efficient to grind the material at the cellular scale, as these devices favor the particle population around ≈20 μm [ 47 ].…”

Section: Influence Of Milling On the Properties Of Particles (Sizementioning

confidence: 99%

Comminution of Dry Lignocellulosic Biomass, a Review: Part I. From Fundamental Mechanisms to Milling Behaviour

et al. 2018

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The comminution of lignocellulosic biomass is a key operation for many applications as bio-based materials, bio-energy or green chemistry. The grinder used can have a significant impact on the properties of the ground powders, of those of the end-products and on the energy consumption. Since several years, the milling of lignocellulosic biomass has been the subject of numerous studies most often focused on specific materials and/or applications but there is still a lack of generic knowledge about the relation between the histological structure of the raw materials, the milling technologies and the physical and chemical properties of the powders. This review aims to point out the main process parameters and plant raw material properties that influence the milling operation and their consequences on the properties of ground powders and on the energy consumption during the comminution.

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DRY biorefineries: Multiscale modeling studies and innovative processing

Cited by 26 publications

References 60 publications

Comminution of Dry Lignocellulosic Biomass: Part II. Technologies, Improvement of Milling Performances, and Security Issues

Comminution of Dry Lignocellulosic Biomass: Part II. Technologies, Improvement of Milling Performances, and Security Issues

Enzymatic Degradation of Maize Shoots: Monitoring of Chemical and Physical Changes Reveals Different Saccharification Behaviors

Comminution of Dry Lignocellulosic Biomass, a Review: Part I. From Fundamental Mechanisms to Milling Behaviour

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