Characterization of the lignin obtained by alkaline delignification and of the cellulose residue from steam-exploded olive stones

Fernández‐Bolaños, Juan; Felizón, B.; Heredia, Antonia; Guillén, Rafael; Jiménez, Ana

doi:10.1016/s0960-8524(98)00134-5

Cited by 116 publications

(56 citation statements)

References 28 publications

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“…During steam explosion, glycosidic bonds in the hemicellulose were hydrolyzed, hemicellulose-lignin bonds were cleaved, and lignin was depolymerized. These reactions produced water-soluble sugars and phenolic compounds, leaving a residue of alpha-cellulose and lignin (Donaldson et al 1988;Fernandez-Bolanos et al 1999;Li et al 2007). Therefore, with the hemicellulose, pectin, and acid-soluble lignin partially removed, the proportion of acid-insoluble lignin in kenaf fibers increased.…”

Section: Effect Of Steam Pressure On Chemical Compositions Of Kenaf Fmentioning

confidence: 99%

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Zhang¹,

Han²,

Jiang³

et al. 2016

BioResources

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The chemical and structural properties of kenaf fibers that were treated at different steam pressures during the steam explosion process were investigated. With increased steam pressure, a higher percentage of cellulose and acid-insoluble lignin and a lower content of hemicellulose and pectin were obtained. This result was further confirmed by Fourier transform infrared (FTIR) spectroscopy. X-ray diffraction (XRD) studies revealed that the steam-exploded kenaf fibers were more crystalline than the raw kenaf fibers, and that excessive steam pressure above 3 MPa damaged the cellulose crystalline structure. Scanning electron microscopy (SEM) analysis showed a change in the surface morphology of the treated kenaf fibers. The lower content of gums and the effective defibrillation of steam-exploded kenaf fibers demonstrated the potential of steam explosion treatment in applications of kenaf fibers.

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Section: Effect Of Steam Pressure On Chemical Compositions Of Kenaf Fmentioning

confidence: 99%

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Zhang¹,

Han²,

Jiang³

et al. 2016

BioResources

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“…Pure lignin is basically an amorphous form consisted of aromatic ether backbone that can be potential substrates for the production of aromatic chemicals (Chakar & Ragauskas, 2004). Lignin can be isolated in large quantity from lignocellulosic materials by a strong dilute acid, alkaline treatment, organosolve isolation or sulphite pulping process (Pouteaua, et al, 2003;Fernandez-Bolanos, et al, 1999). However, the drawbacks in the case of the above processes are toxicity, high cost, difficulties in recovery, severe side-reaction, and instability in processing.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of Lignin from Rubber Wood in Ionic Liquid Medium

Shamsuri¹,

Abdullah²

2010

MAS

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In this study, lignin was isolated from rubber wood by means of ionic liquid (1,3-dimethylimidazolium methylsulfate). The optimum parameters to isolate lignin were investigated which include the concentrations of ionic liquid (0.1, 0.2, 0.3, 0.4, 0.5 moles), isolation durations (30, 60, 90, 120, 150 minutes), and isolation temperatures (25, 40, 60, 80, 100°C). The optimum parameters for lignin isolation are 0.5 moles concentration, 120 minutes and 100ºC. Lignin could be isolated from rubber wood up to 13.03wt.% by ionic liquid however, in comparison with acid and alkaline isolation, they give better yields than ionic liquid which 22.15wt.% and 18.56wt.% of lignin, respectively. Lignin preliminary structures isolated by ionic liquid have been confirmed based on Fourier transform infrared (FTIR) results. From these results, isolated lignin by ionic liquid provides lignin without other related isolative. Apart from that, ionic liquid also could be recycled up to three times compared to acid and alkaline isolation methods.

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“…Valuable compounds of that can be extracted from these residues include glucose, phenolics and other antioxidants [360,[362][363][364]. Steam explosion is also considered as an effective pretreatment for obtaining valuable compounds from olive residues, including pomace and leaves [365,366]. Cara, et al [360] applied steam explosion as a preparatory process for the use of olive residues, mainly olive wood as substrate for enzymatic hydrolysis.…”

Section: Pretreatment Of Olive Pomace and Leavesmentioning

confidence: 99%

“…Besides their application as composites, fibers of olive cell wall can be extracted from olive mill by-products and used for the derivation of microcrystalline or powdered cellulose, as fat substitutes or gelling agents [366,406,[412][413][414]. Pectic material of olive pomace, which could replace fat in confectionary has been obtained by extraction with nitric acid.…”

Section: Purification Of Olive Fibersmentioning

confidence: 99%

Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review

Fritsch

Stäbler

Happel³

et al. 2017

Sustainability

157

102

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Abstract:The vast and ever-growing amount of agricultural and food wastes has become a major concern throughout the whole world. Therefore, strategies for their processing and value-added reuse are needed to enable a sustainable utilization of feedstocks and reduce the environmental burden. By-products of potato, tomato, cereals and olive arise in significant amounts in European countries and are consequently of high relevance. Due to their composition with various beneficial ingredients, the waste products can be valorized by different techniques leading to economic and environmental advantages. This paper focuses on the waste generation during industrial processing of potato, tomato, cereals and olives within the European Union and reviews state-of-the-art technologies for their valorization. Furthermore, current applications, future perspectives and challenges are discussed.

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Characterization of the lignin obtained by alkaline delignification and of the cellulose residue from steam-exploded olive stones

Cited by 116 publications

References 28 publications

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Effect of Steam Pressure on Chemical and Structural Properties of Kenaf Fibers during Steam Explosion Process

Isolation and Characterization of Lignin from Rubber Wood in Ionic Liquid Medium

Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review

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