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Prehydrolysis and organosolv delignification process for the recovery of hemicellulose and lignin from beech wood. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2020.100506] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Duan Q, Shuai X, Yang D, Zhou X, Gao T. Kinetic Analysis of Pulping of Rice Straw with p-Toluene Sulfonic Acid. ACS OMEGA 2020; 5:7787-7791. [PMID: 32309687 PMCID: PMC7160839 DOI: 10.1021/acsomega.9b03622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
The kinetics of pulping of rice straw was studied with p-toluenesulfonic acid (p-TsOH). Pulping with 50% p-TsOH aqueous solution was performed at 70-100 °C for 0-360 min. The results showed that the delignification reaction could be divided into two phases: the bulk delignification phase and the supplementary delignification phase. Lignin dissolution was the main process in the bulk delignification stage, accompanied by the degradation of a small amount of carbohydrates. In the supplementary delignification stage, the delignification rate was low and carbohydrate degradation was severe. The degradation of carbohydrates is mainly based on the dissolution of hemicellulose. A combined delignification factor (CDF) and a combined hydrolysis factor (CHF) were used to compare severity-based kinetic analyses. The results showed that the degradation process for lignin and hemicellulose can be well-fitted using CDF and CHF models. The fitted results show that the activation energy of the hemicellulose loss reaction and delignification reaction was 68.21 and 46.05 kJ/mol, respectively. Therefore, the use of p-TsOH for pulping is a technology with very broad application prospects.
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Infrared Spectroscopy as Alternative to Wet Chemical Analysis to Characterize Eucalyptus globulus Pulps and Predict Their Ethanol Yield for a Simultaneous Saccharification and Fermentation Process. Appl Biochem Biotechnol 2012; 168:2028-42. [DOI: 10.1007/s12010-012-9915-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 10/03/2012] [Indexed: 10/27/2022]
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Requejo A, Peleteiro S, Garrote G, Rodríguez A, Jiménez L. Biorefinery of olive pruning using various processes. BIORESOURCE TECHNOLOGY 2012; 111:301-307. [PMID: 22386468 DOI: 10.1016/j.biortech.2012.01.156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/24/2012] [Accepted: 01/25/2012] [Indexed: 05/31/2023]
Abstract
Biorefinery developed involve separation of olive pruning into two parts: main (OPM) (stems>1cm diameter), and residual (OPR) (stems<1cm diameter, and leaves). OPM was submitted to hydrothermal treatment, separating: a liquid fraction (HL), rich in products of hemicelluloses decomposition, and other solid (HS), rich in cellulose and lignin. HS is subject to pulping, resulting: a liquid fraction (HPL), rich in lignin, and other solid (HPS), rich in cellulose. Up to 42% of the polysaccharides from OPM were recovered in HL as valuable compounds. HPS can be used for the bioethanol production by saccharification and fermentation, reaching a bioethanol conversion of 90.6% of the theoretical value. In addition, HPS obtained paper with lower strength properties than those of paper obtained from OPM pulp directly. OPR provided 18.70 MkJ/t heating values, 1094-2234°C flame temperature, and 45-53°C dew point temperature, with a cost of the unit of heat (3.20 €/MkJ) much lower than fossil fuels fluids.
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Affiliation(s)
- A Requejo
- Chemical Engineering Department, University of Córdoba, Spain
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Ho CL, Wu KT, Wang EIC, Su YC. Delignification Kinetics Study on the Tetrahydrofurfuryl Alcohol/HCl Pulping of Rice Straw. Ind Eng Chem Res 2011. [DOI: 10.1021/ie102184c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen-Lung Ho
- Department of Forestry, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402
- Division of Wood Cellulose, Taiwan Forestry Research Institute, 53, Nanhai Road, Taipei, Taiwan 100
| | - Keng-Tung Wu
- Department of Forestry, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402
| | - Eugene I-Chen Wang
- Division of Wood Cellulose, Taiwan Forestry Research Institute, 53, Nanhai Road, Taipei, Taiwan 100
| | - Yu-Chang Su
- Department of Forestry, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402
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Development and Characterization of an Environmentally Friendly Process Sequence (Autohydrolysis and Organosolv) for Wheat Straw Delignification. Appl Biochem Biotechnol 2011; 164:629-41. [DOI: 10.1007/s12010-011-9163-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
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Jiménez L, Angulo V, Rodríguez A, Sánchez R, Ferrer A. Pulp and paper from vine shoots: neural fuzzy modeling of ethylene glycol pulping. BIORESOURCE TECHNOLOGY 2009; 100:756-762. [PMID: 18760594 DOI: 10.1016/j.biortech.2008.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 07/10/2008] [Accepted: 07/12/2008] [Indexed: 05/26/2023]
Abstract
The influence of operational variables in the pulping of vine shoots by use of ethylene glycol [viz. temperature (155-185 degrees C), cooking time (30-90 min) and ethylene glycol concentration (50-70% v/v)] on the properties of the resulting pulp (viz. yield, kappa number and viscosity) and paper sheets (breaking length, stretch, burst index, tear index and brightness) was studied. A central composite factorial design was used in conjunction with the software ANFIS Edit Matlab 6.5 to develop fuzzy neural model that reproduced the experimental results of the dependent variables with errors less than 5%. The model is therefore effective with a view to simulating the ethylene glycol pulping process.
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Affiliation(s)
- L Jiménez
- Chemical Engineering Department, Campus of Rabanales, C-3, University of Córdoba, Spain.
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Effect of organosolv ethanol pretreatment variables on physical characteristics of hybrid poplar substrates. Appl Biochem Biotechnol 2008; 137-140:367-77. [PMID: 18478402 DOI: 10.1007/s12010-007-9065-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Hybrid poplar (Populus nigra x P. maximowiczii) chips were pretreated using an organosolv ethanol process. The effect of pretreatment conditions (temperature, time, catalyst, and ethanol concentration) on the substrate characteristics, including fiber size, crystallinity, and degree of polymerization of cellulose, was investigated using an experimental matrix designed with response surface methodology. The conditions ranged 155-205 degrees C, 26-94 min, 0.83-1.67% catalyst (H(2)SO(4)) on oven-dry wood chip (w/w), and 25-75% ethanol concentration (v/v). The results indicated that the substrate characteristics are controllable and predictable. Desirable substrates can be prepared by fine-tuning the processing parameters. The regression models developed, allowed the quantitative prediction of the substrate characteristics from the pretreatment conditions used.
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Ruzene DS, Gonçalves AR, Teixeira JA, de Amorim MTP. Carboxymethylcellulose obtained by ethanol/water organosolv process under acid conditions. Appl Biochem Biotechnol 2008; 137-140:573-82. [PMID: 18478417 DOI: 10.1007/s12010-007-9080-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sugar cane bagasse pulps were obtained by ethanol/water organosolv process under acid and alkaline conditions. The best condition of acid pulping for the sugarcane bagasse was 0.02 mol/L sulfuric acid at 160 degrees C, for 1 h, whereas the best condition for alkaline pulping was 5% sodium hydroxide (base pulp) at 160 degrees C, for 3 h. For the residual lignin removal, the acid and alkaline pulps were submitted to a chemical bleaching using sodium chlorite. Pulps under acid and alkaline conditions bleached with sodium chlorite presented viscosities of 3.6 and 7.8 mPa x s, respectively, and mu-kappa numbers of 1.1 and 2.4, respectively. The pulp under acid condition, bleached with sodium chlorite was used to obtain carboxymethylcellulose (CMC). CMC yield was 35% (pulp based), showing mass gain after the carboxymethylation reaction corresponding to 23.6% of substitution or 0.70 groups -CH(2) COONa per unit of glucose residue. The infrared spectra showed the CMC characteristic bands and by the infrared technique it was possible to obtain a substitution degree (0.63), similar to the substitution degree calculated by mass gain (0.70).
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Affiliation(s)
- Denise S Ruzene
- Departamento de Biotecnologia, Escola de Engenharia de Lorena-USP, CxPostal 116, CEP 12.600-970, Lorena SP, Brazil
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Jiménez L, Angulo V, Caparrós S, Pérez A, Ferrer J. Neural fuzzy modeling of ethanolamine pulping of vine shoots. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2006.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pan X, Xie D, Yu RW, Lam D, Saddler JN. Pretreatment of Lodgepole Pine Killed by Mountain Pine Beetle Using the Ethanol Organosolv Process: Fractionation and Process Optimization. Ind Eng Chem Res 2007. [DOI: 10.1021/ie061576l] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuejun Pan
- Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, Wisconsin 53706, and Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4 Canada
| | - Dan Xie
- Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, Wisconsin 53706, and Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4 Canada
| | - Richard W. Yu
- Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, Wisconsin 53706, and Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4 Canada
| | - Dexter Lam
- Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, Wisconsin 53706, and Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4 Canada
| | - Jack N. Saddler
- Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, Wisconsin 53706, and Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4 Canada
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Pan X, Gilkes N, Kadla J, Pye K, Saka S, Gregg D, Ehara K, Xie D, Lam D, Saddler J. Bioconversion of hybrid poplar to ethanol and co-products using an organosolv fractionation process: optimization of process yields. Biotechnol Bioeng 2006; 94:851-61. [PMID: 16523526 DOI: 10.1002/bit.20905] [Citation(s) in RCA: 337] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An organosolv process involving extraction with hot aqueous ethanol has been evaluated for bioconversion of hybrid poplar to ethanol. The process resulted in fractionation of poplar chips into a cellulose-rich solids fraction, an ethanol organosolv lignin (EOL) fraction, and a water-soluble fraction containing hemicellulosic sugars, sugar breakdown products, degraded lignin, and other components. The influence of four independent process variables (temperature, time, catalyst dose, and ethanol concentration) on product yields was analyzed over a broad range using a small composite design and response surface methodology. Center point conditions for the composite design (180 degrees C, 60 min, 1.25% H(2)SO(4), and 60% ethanol), yielded a solids fraction containing approximately 88% of the cellulose present in the untreated poplar. Approximately 82% of the total cellulose in the untreated poplar was recovered as monomeric glucose after hydrolysis of the solids fraction for 24 h using a low enzyme loading (20 filter paper units of cellulase/g cellulose); approximately 85% was recovered after 48 h hydrolysis. Total recovery of xylose (soluble and insoluble) was equivalent to approximately 72% of the xylose present in untreated wood. Approximately 74% of the lignin in untreated wood was recovered as EOL. Other cooking conditions resulted in either similar or inferior product yields although the distribution of components between the various fractions differed markedly. Data analysis generated regression models that describe process responses for any combination of the four variables.
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Affiliation(s)
- Xuejun Pan
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada V6T 1Z4.
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Mutjé P, Pèlach MA, Vilaseca F, García JC, Jiménez L. A comparative study of the effect of refining on organosolv pulp from olive trimmings and kraft pulp from eucalyptus wood. BIORESOURCE TECHNOLOGY 2005; 96:1125-1129. [PMID: 15683902 DOI: 10.1016/j.biortech.2004.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Revised: 10/08/2004] [Accepted: 10/11/2004] [Indexed: 05/24/2023]
Abstract
This paper examines the influence of the degree of refining of different pulps, produced from olive trimmings and eucalyptus wood, on various physical properties. Corresponding pulps were obtained by means of different cooking processes. Pulp from olive trimmings was obtained by means of an organosolv process and pulp from eucalyptus was obtained by means of a kraft process. Pulp from olive trimmings exhibited a lower specific surface area, water retention volume, breaking length, stretch and burst index, but a higher porosity, than eucalyptus pulp. On the other hand, the same degree of refining was achieved with less energy for olive pulp than for eucalyptus pulp. Mixed pulp from olive trimmings and eucalyptus provided paper sheets with acceptable physical properties but with reduced refining energy costs relative to eucalyptus pulp alone.
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Affiliation(s)
- P Mutjé
- Grupo LEPAMAP, Departamento de Ingeniería Química, Universidad de Girona, Avda. Lluis Santaló s/n, 17071 Girona, Spain
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Jiménez L, Rodríguez A, Calero A, Eugenio M. Use of Ethanolamine–Soda–Water Mixtures for Pulping Olive Wood Trimmings. Chem Eng Res Des 2004. [DOI: 10.1205/0263876041580686] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jiménez L, Pérez I, Garcı́a J, Rodrı́guez A, Ferrer J. Influence of ethanol pulping of wheat straw on the resulting paper sheets. Process Biochem 2002. [DOI: 10.1016/s0032-9592(01)00255-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vila C, Santos V, Parajó JC. Optimization of beech wood pulping in catalyzed acetic acid media. CAN J CHEM ENG 2000. [DOI: 10.1002/cjce.5450780514] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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BOTELLO JI, GILARRANZ MA, RODRÍGUEZ F, OLIET M. Recovery of Solvent and By-Products from Organosolv Black Liquor. SEP SCI TECHNOL 1999. [DOI: 10.1081/ss-100100783] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Gilarranz MA, Oliet M, Rodriguez F, Tijero J. Methanol-based pulping ofeucalyptus globulus. CAN J CHEM ENG 1999. [DOI: 10.1002/cjce.5450770312] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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