Xylose removal from lignocellulosic biomass via a twin-screw extruder: The effects of screw configurations and operating conditions

Zheng, Jian; Choo, Kim; Rehmann, Lars

doi:10.1016/j.biombioe.2016.03.012

Cited by 12 publications

(9 citation statements)

References 25 publications

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“…Gatt and Vandenbossche [14] proposed the following screw configuration for LBE: F-T-M-R-M-R-M-T; where F = forward transport element (with more spaced spirals than T), T = transport element (forward), M = mixing element (kneading), and R = reverse transport element. Although screw configuration differs from one user to another, the T-M pattern is almost always present at the beginning of a screw configuration [14,[77][78][79].…”

Section: Screw Configurationmentioning

confidence: 99%

“…Kuster et al [44] reported similar results on sugarcane biomass, with the insertion of a RSE increasing the yield of lignocellulose hydrolysis. Zheng et al [78] investigated height screw configuration to find the best one for xylose separation from steam-exploded corncobs and found that xylose recovery was higher using configurations containing one or more RSE. They also found that while xylose yield varied with configurations containing RSE, these outcomes were always superior to a configuration without RSE.…”

Section: Reverse Screw Elementmentioning

confidence: 99%

“…A screw configuration for LCB pretreatment will typically contain at least one kneading block comprised of two or more juxtaposed KE. During LBE a kneading block is ideally set immediately downstream of the first FSE [14,77,78]. Furthermore, Kuster et al [44] demonstrated that the best place for a RSE is just after a kneading block because of the additional back pressure and resistance provided by the RSE.…”

Section: Kneading Elementmentioning

confidence: 99%

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An Overview of Extrusion as a Pretreatment Method of Lignocellulosic Biomass

et al. 2022

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Lignocellulosic biomass is both low cost and abundant, and unlike energy crops, can escape associated ethical dilemmas such as arable land use and food security issues. However, their usage as raw material in a biorefinery implies an inherent upstream pretreatment step to access compounds of interest derived from lignocellulosic biomass. Importantly, the efficiency of this step is determinant for the downstream processes, and while many pretreatment methods have been explored, extrusion is both a very flexible and promising technology. Extrusion is well-known in both the polymer and pharmaceutical industries and has been used since the 18th century. However, as a pretreatment method for lignocellulosic biomass, extrusion is relatively new. The first use for this purpose dates back to the 1990s. Extrusion enjoys a high degree of flexibility due to the many available parameters, but an understanding of extrusion requires a knowledge of these parameters and the different relationships between them. In this paper, we present a concise overview of lignocellulosic biomass extrusion by reviewing key extrusion parameters and their associated extruder design components and operating conditions.

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Section: Screw Configurationmentioning

confidence: 99%

Section: Reverse Screw Elementmentioning

confidence: 99%

Section: Kneading Elementmentioning

confidence: 99%

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An Overview of Extrusion as a Pretreatment Method of Lignocellulosic Biomass

et al. 2022

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“…Many authors have established the importance of constraint elements in extrusion for the fibrillation of lignocellulosic biomass and improvement of the enzymatic digestibility [16,[20][21][22]. Furthermore, Vandenbossche et al [23] observed that insufficient backpressure caused unstable flow inside the extruder and prevented a good filtration of dehydrated sweet corn co-products treated inside the machine, first with NaOH and then neutralized with H 3 PO 4 .…”

Section: Screw Configurationmentioning

confidence: 99%

Study of the Application of Alkaline Extrusion to the Pretreatment of Eucalyptus Biomass as First Step in a Bioethanol Production Process

et al. 2018

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Eucalyptus biomass was studied as a feedstock for sugars release using an alkaline extrusion plus a neutralization-based pretreatment. This approach would be a first step in a bioconversion process aimed at obtaining fuel bioethanol from eucalyptus biomass. The best operation conditions of extrusion (screw speed, temperature, liquid to solid ratio and NaOH amount) that lead to an effective destructuration of lignocellulose and enhanced sugar release were investigated. Two process configurations, with and without filtration inside the extruder, were tested. In the case without filtration, washed and not washed extrudates were compared. It was demonstrated that filtration step was convenient to remove inorganic salts resulting from neutralization and to promote the mechanical effect of extrusion, but limitations in the machine used in the work prevented testing of temperatures above 100 °C using this configuration. In the no filtration strategy, a temperature of 150 °C allowed attaining the highest glucan and xylan conversion rates by enzymatic hydrolysis of extruded biomass, almost 40% and 75%, respectively, of the maximum yield that could be attained if all carbohydrates contained in raw eucalyptus were converted to sugars. Some of the mechanisms and individual effects underlying alkaline extrusion of eucalyptus were figured out in this work, providing guidelines for a successful pretreatment design that needs to be further studied.

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“…In recent years, the strategies for lignocellulose pretreatment have developed mainly including acids, alkali, or enzymes and ionic liquid, mechanical squeezing, steam explosion, hydrothermal treatment, and microwave used as the auxiliary ways . The advanced pretreating process for lignocellulose mainly focused on breaking the robust its structure.…”

Section: Introductionmentioning

confidence: 99%