Viscoelastic Properties of Pulp Suspensions of Bleached Sugarcane Bagasse: Effects of Consistency and Temperature

Sánchez, Jorge H.; Fajardo, Mery E.; Quintana, Germán

doi:10.15376/biores.11.4.8355-8363

Cited by 3 publications

(3 citation statements)

References 18 publications

(28 reference statements)

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“…Compared with other classical pulping processes, soda pulping is the most economical, efficient, and simple for nonwoody feedstock. Soda-anthraquinone pulping has been applied to various agricultural residue non-wood materials, such as bagasse (Samariha and Khakifirooz 2011;Sánchez et al 2016), banana (Rosal et al 2012), and cotton stalks , but no work on Sudanese millet stalks and date palm leaves has been reported to date.…”

Section: Introductionmentioning

confidence: 99%

Sudanese Agro-residue as a Novel Furnish for Pulp and Paper Manufacturing

et al. 2017

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Sudan has rich sources of lignocellulose materials from agricultural waste that have potential to be used as a papermaking furnish following adequate chemical compositions, elemental analysis, fibre dimensions, and morphology of millet stalks and date palm leaves. Paper sheet properties from the various pulps made were investigated, and it was found that there was no difference in the polysaccharide (cellulose and hemicelluloses) content between millet stalks and date palm leaves, although millet stalks had a high lignin content of 18.20% relative to date palm leaves' content of 15.34%. Moreover, millet stalks showed a high pulp yield (42.04%) with a viscosity of 665 mL/g compared to that (34.43%, 551 mL/g) and (38.50% and 534 mL/g) of date palm leaves and the blend, respectively. Papers produced from date palm leaves and millet stalk blends showed better physical properties compared to that of pure millet stalks and date palm leaves. The Scanning Electron Microscopy (SEM) analysis showed that fibres in the blend were more closely packed than that of the pure millet stalks and date palm leaves fibers. Based on their physical and chemical composition properties, millet stalks and date palm leaves have a high potential as a furnish for pulp and papermaking.

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Section: Introductionmentioning

confidence: 99%

Sudanese Agro-residue as a Novel Furnish for Pulp and Paper Manufacturing

et al. 2017

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“…However, the utilisation of these materials for pulp and papermaking are attractive (Khider et al 2012). In recent years, there has been an increasing trend towards the application of agro-industrial residues as raw materials for pulp and paper production (Sánchez et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Sudanese Sorghum and Bagasse as a Pulp and Paper Feedstock

Saeed¹,

Liu²,

Lucia³

et al. 2017

BioResources

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The suitability of specific Sudanese agrowastes, sorghum straw, bagasse, and their 50% blend, were investigated for pulp and papermaking initiatives. A chemical analysis of sorghum straw and bagasse revealed levels of cellulose, lignin, hemicellulose, and ash for sorghum straw and bagasse that signalled a suitable relation to traditional wood feedstocks for pulping and papermaking applications. Moreover, the pulp yield and viscosity of sorghum straw were lower and higher, respectively, compared with the bagasse and the blend. More specifically, the papers obtained from bagasse showed better physical properties (tensile strength, tearing index, bursting index, and folding) compared to those of sorghum straw and the blend. The surface morphologies of the papers were analysed using scanning electron microscopy (SEM), which showed that the fibres had a long, swollen, compact, and closely packed arrangement and were more homogeneous and well-blended for the bagasse compared with the pure sorghum straw and the 50% blend.

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“…The rheological understanding of lignocellulosic suspensions is fundamental to the optimization of process efficiency [10,24]. Through the bibliography analysis, there is only 3 publications that investigates in parallel the biochemical, morphological and in-situ [16] and ex-situ [25,26] rheological approaches. Aiming to complete this knowledge, and for further research on high dry matter conditions, our strategy was to investigate enzymatic hydrolysis at semi-dilute conditions to understand the fragmentation and solubilization mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Using in-situ viscosimetry and morphogranulometry to explore hydrolysis mechanisms of filter paper and pretreated sugarcane bagasse under semi-dilute suspensions

Anne-Archard

Coma

Cameleyre

et al. 2017

Biochemical Engineering Journal

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 18375 a b s t r a c tThe relationship between in-situ viscosimetry, in-and ex-situ morphogranulometry, and biochemistry has been investigated during enzymatic hydrolysis of pretreated sugarcane bagasse (SCB, 3% w/v) and filter paper (FP, 1.5% w/v) at various enzyme dosages (0.3-25 FPU/g cellulose). Semi-dilute conditions (1.5-2 times higher than critical concentrations) were considered in order to generate non-Newtonian rheological behaviors and to avoid neglecting particle-particle interactions in opposition to dilute conditions. Observed phenomena as well as hydrolysis mechanisms including solvation, separation, fragmentation, and solubilization appeared to depend strongly on initial substrate properties. For both FP and SCB, suspension viscosities were correlated with particle size distributions and volume fractions during hydrolysis, but they exhibited strongly different trends. With SCB, a viscosity overtaking was clearly observed at enzyme loading ≤10 FPU/g cellulose. This phenomenon is explained by the separation of agglomerates into individual fragments, leading to an increase in the total number of particles and a morphological shift of particles from sphere-like into fiber-like. With FP, the viscosity collapsed at the initial stage in relation to the volume reduction of coarse particles and the number increase of fine particles. Suspension viscosity was strongly dependent on the fraction of coarse population and nearly independent from the glucose conversion yield.Abbreviations: CLD, chord length distribution; DLS, diffraction light scattering; d SE , diameter of circle equivalent (m); FBRM, focused beam reflectance measurement; FP, filter paper; FPU, filter paper unit; lc , chord length (m); LOD, limit of detection; LOQ, limit of quantification; MO, Metzner-Otto concept; Nc, number of chord counted (/); Np, power number (/); PP, paper pulp; PSD, particle size distribution; Re, Reynolds number (/); SCB, sugarcane bagasse.

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Viscoelastic Properties of Pulp Suspensions of Bleached Sugarcane Bagasse: Effects of Consistency and Temperature

Cited by 3 publications

References 18 publications

Sudanese Agro-residue as a Novel Furnish for Pulp and Paper Manufacturing

Sudanese Agro-residue as a Novel Furnish for Pulp and Paper Manufacturing

Evaluation of Sudanese Sorghum and Bagasse as a Pulp and Paper Feedstock

Using in-situ viscosimetry and morphogranulometry to explore hydrolysis mechanisms of filter paper and pretreated sugarcane bagasse under semi-dilute suspensions

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