A combined adsorption and flocculation process for producing lignocellulosic complexes from spent liquors of neutral sulfite semichemical pulping process

Dashtban, Mehdi; Gilbert, A. F.; Fatehi, Pedram

doi:10.1016/j.biortech.2014.03.006

Cited by 19 publications

(16 citation statements)

References 28 publications

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“…Calorific value or high heating value (HHV) of lignin samples was measured according to ASTM E711-87 using a Parr 6200 oxygen bomb calorimeter as previously described. 7 Thermogravimetric analysis (TGA) was assessed for all oven dried samples by a thermogravimetric analyzer (TGA)-i1000 series (Instrument Specialist Inc., U.S.A.) in air at 35 mL/min and increment rates of 10, 12.5, 15, 17.5, and 208C/min according to an establish method. 26 Activation Energy Determination Nonisothermal methods have been applied to calculate the effective activation energy as a function of conversion rather than temperature.…”

Section: Calorific Value and Thermogravimetric Analysismentioning

confidence: 99%

“…The spent liquor (SL) of this process contains a portion of lignocelluloses, which is currently wasted in the wastewater of the mill. 7,8 In the kraft-based dissolving pulp process, hemicelluloses and lignin are partially separated from wood chips and dissolved in prehydrolysis liquor (PHL) of the process. The PHL is mixed with black liquor and sent to the evaporators of the kraft pulping process prior to combustion, but as PHL is a dilute stream, it increases the load to the evaporators.…”

Section: Introductionmentioning

confidence: 99%

“…The PHL is mixed with black liquor and sent to the evaporators of the kraft pulping process prior to combustion, but as PHL is a dilute stream, it increases the load to the evaporators. [7][8][9] Kraft lignin is already used as fuel in the kraft pulping process. Kraft lignin can be extracted from black liquor via Lignoboost and LignoForce TM technologies.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of four different lignins as a first step toward the identification of suitable end‐use applications

Oveissi

Fatehi

2015

J of Applied Polymer Sci

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To determine the most appropriate use of lignin, surface, structural, and thermal characteristics of lignin was investigated in this work. It was observed that kraft lignin (KL), the lignin of prehydrolysis liquor (LPHL), lignosulfonate of NSSC process (LSL), and lignosulfonates (LSs) of sulfite pulping process had 0.67, 0.25, 0.90, and 1.52-2.25 meq/g anionic charge density, and 6.3, 2.1, 10.1, and 8.8-10.1 nm hydrodynamic diameter, respectively. These results suggested that LSL and LSs could be used more effectively than other lignin as filler modifiers, flocculants, and dispersants. The combustion studies of the lignin samples suggested that KL and LPHL combusted more efficiently than other samples, as they had high heating (calorific) values of 27.02 and 19.2 MJ/kg, the apparent activation energy of 126.64 and 99.14 kJ/mol based on Flynn-Wall-Ozawa method and 122.16 and 94.73 kJ/mol based on Kissinger-Akahira-Sunose and no ash, respectively. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42336.

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Section: Calorific Value and Thermogravimetric Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of four different lignins as a first step toward the identification of suitable end‐use applications

Oveissi

Fatehi

2015

J of Applied Polymer Sci

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“…Lignocellulosic feed stocks for chemicals, materials and fuel have been the focus in recent years (Dashtban et al, 2014;Fatehi et al, 2013). The wood-based regenerated cellulose products which can be manufactured from dissolving pulps include viscose rayon, cellulose nitrate, and cellulose acetate, among others (Gübitz et al, 1997;Schild and Sixta, 2011).…”

Section: Introductionmentioning

confidence: 99%

Mechanical pretreatment improving hemicelluloses removal from cellulosic fibers during cold caustic extraction

Liu

Duan

et al. 2015

Bioresource Technology

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“…The global annual production of furfural at 2010 has been reported to be around 300,000 t (Dashtban et al 2014), and it is expected that at 2020, the global furfural market will reach 650,000 t (GrandViewResearch 2015). Currently, no technology for chemical synthesis of furfural does exist, and thus, furfural is the most abundant industrial chemical that is derived from lignocellulose.…”

Section: Introductionmentioning

confidence: 99%

Bioethanol and lipid production from the enzymatic hydrolysate of wheat straw after furfural extraction

Brandenburg

Poppele

Blomqvist

et al. 2018

Appl Microbiol Biotechnol

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This study investigates biofuel production from wheat straw hydrolysate, from which furfural was extracted using a patented method developed at the Latvian State Institute of Wood Chemistry. The solid remainder after furfural extraction, corresponding to 67.6% of the wheat straw dry matter, contained 69.9% cellulose of which 4% was decomposed during the furfural extraction and 26.3% lignin. Enzymatic hydrolysis released 44% of the glucose monomers in the cellulose. The resulting hydrolysate contained mainly glucose and very little amount of acetic acid. Xylose was not detectable. Consequently, the undiluted hydrolysate did not inhibit growth of yeast strains belonging to Saccharomyces cerevisiae, Lipomyces starkeyi, and Rhodotorula babjevae. In the fermentations, average final ethanol concentrations of 23.85 g/l were obtained, corresponding to a yield of 0.53 g ethanol per g released glucose. L. starkeyi generated lipids with a rate of 0.08 g/h and a yield of 0.09 g per g consumed glucose. R. babjevae produced lipids with a rate of 0.18 g/h and a yield of 0.17 per g consumed glucose. In both yeasts, desaturation increased during cultivation. Remarkably, the R. babjevae strain used in this study produced considerable amounts of heptadecenoic, α,- and γ-linolenic acid.

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A combined adsorption and flocculation process for producing lignocellulosic complexes from spent liquors of neutral sulfite semichemical pulping process

Cited by 19 publications

References 28 publications

Characterization of four different lignins as a first step toward the identification of suitable end‐use applications

Characterization of four different lignins as a first step toward the identification of suitable end‐use applications

Mechanical pretreatment improving hemicelluloses removal from cellulosic fibers during cold caustic extraction

Bioethanol and lipid production from the enzymatic hydrolysate of wheat straw after furfural extraction

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