预水解强度对相思木硫酸盐法制浆黑液性质的影响
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摘要
经水热预水解技术处理木质纤维素,木片的主要成分发生变化,对后续的化学制浆性能及制浆黑液性质带来影响。本实验采用不同预水解强度(P因子)处理相思木片,并对其硫酸盐制浆行为和黑液性质进行分析。研究结果表明,随着P因子的增大,粗浆得率和细浆得率逐渐降低;浆料的卡伯值逐渐升高。当P因子<200时,水解后木片的黑液固形物含量由空白组的138.48 g/L升高到162.86 g/L;木素含量由58.57 g/L升高到72.68 g/L;残碱量由4.37 g/L迅速降低到2.07 g/L。当200600时,黑液中固形物含量由142.71 g/L升高到156.95 g/L;木素含量由59.16 g/L升高到62.16 g/L;残碱量由1.26 g/L升高到1.37 g/L。不同条件下,黑液中无机物含量变化不大;黑液固形物的热值由对照组的13.71 MJ/kg提高到14.63～15.09 MJ/kg。
The lignocellulose is treated by hydrothermal prehydrolysis technology, and the main components of the wood chips are changed, which has an impact on the subsequent chemical pulping properties and the properties of the pulping black liquor. In this experiment, Acacia wood chips were treated with different prehydrolysis strength(P-factor), and their kraft pulping behavior and resulting black liquor properties were analyzed. The results showthat the yield of final pulp is reduced with the increase of P-factor, while the kappa number of pulp is graduallyincreased. When the P-factor is less than 200, the solid content of the black liquor is increased from 138.48 g/L inthe control group to 162.86 g/L, the lignin content is increased from 58.57 g/L to 72.68 g/L, and the residualalkalinity content is decreased from 4.37 g/L to 2.07 g/L. When the P-factor at 200—600, the solid content of blackliquor is reduced from 162.86 g/L to 142.71 g/L, the lignin content is reduced from 72.41 g/L to 59.16 g/L, and theresidual alkalinity content is reduced from 2.07 g/L to 1.26 g/L. When the P-factor is greater than 600, the solid content of the black liquor is increased from 142.71 g/L to 156.95 g/L, the lignin content is increased from 59.16g/L to 62.16 g/L, and the residual alkali content is increased from 1.26 g/L to 1.37 g/L. Under different conditions,the content of inorganic substance in black liquor changed little, and the calorific value of solid substance in black liquor increased from 13.71 MJ/kg in control group to 14.63—15.09 MJ/kg.
The lignocellulose is treated by hydrothermal prehydrolysis technology, and the main components of the wood chips are changed, which has an impact on the subsequent chemical pulping properties and the properties of the pulping black liquor. In this experiment, Acacia wood chips were treated with different prehydrolysis strength(P-factor), and their kraft pulping behavior and resulting black liquor properties were analyzed. The results showthat the yield of final pulp is reduced with the increase of P-factor, while the kappa number of pulp is graduallyincreased. When the P-factor is less than 200, the solid content of the black liquor is increased from 138.48 g/L inthe control group to 162.86 g/L, the lignin content is increased from 58.57 g/L to 72.68 g/L, and the residualalkalinity content is decreased from 4.37 g/L to 2.07 g/L. When the P-factor at 200—600, the solid content of blackliquor is reduced from 162.86 g/L to 142.71 g/L, the lignin content is reduced from 72.41 g/L to 59.16 g/L, and theresidual alkalinity content is reduced from 2.07 g/L to 1.26 g/L. When the P-factor is greater than 600, the solid content of the black liquor is increased from 142.71 g/L to 156.95 g/L, the lignin content is increased from 59.16g/L to 62.16 g/L, and the residual alkali content is increased from 1.26 g/L to 1.37 g/L. Under different conditions,the content of inorganic substance in black liquor changed little, and the calorific value of solid substance in black liquor increased from 13.71 MJ/kg in control group to 14.63—15.09 MJ/kg.
引文
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[14] Wang X, Zhuang J, Fu Y, et al. Separation of hemicellulosederived saccharides from wood hydrolysate by lime and ion exchange resin[J]. Bioresource Technology, 2016, 206:225-230.
[15] Saeed A, Jahan M S, Li H, et al. Mass balances of components dissolved in the pre-hydrolysis liquor of kraft-based dissolving pulp production process from Canadian hardwoods[J]. Biomass&Bioenergy, 2012, 39(4):14-19.
[16] Brasch D J, Free K W. Prehydrolysis-kraft pulping of pinus radiata grown in New Zealand[J]. Tappi, 1965, 48(4):245-248.
[17] Sixta H A. Handbook of Pulp:Kraft Pulping Kinetics[M].Weinheim:Wiley-VCH, 2006:185
[18]石淑兰,何福望.制浆造纸分析与检测[M].北京:中国轻工业出版社, 2003:35-110.Shi S L, He F W. Analysis and Detection of Pulping and Papermaking[M]. Beijing:China Light Industry Press, 2003:35-110
[19] Howard J, Rackemann D W, Zhang Z, et al. Effect of pretreatment on the formation of 5-chloromethyl furfural derived from sugarcane bagasse[J]. RSC Advances, 2016, 6(7):5240-5248.
[20]戴涛.硫酸盐法制浆黑液及主要组分的热解特性研究[D].广州:华南理工大学, 2013.Dai T. Pyrolysis characteristics of main organic components of kraft pulping black liquor[D]. Guangzhou:South China University of Technology, 2013.
[21] Geoffroy T R, Fortin Y, Stevanovic T. Hot-water extraction optimization of sugar maple(Acer saccharum Marsh.)and red maple(Acer rubrum L.)bark applying principal component analysis[J]. Journal of Wood Chemistry&Technology, 2017, 37(4):261-272.
[22] Li Y, Liu W, Hou Q, et al. Release of acetic acid and its effect on the dissolution of carbohydrates in the autohydrolysis pretreatment of poplar prior to chemi-thermomechanical pulping[J]. Industrial&Engineering Chemistry Research, 2014, 53(20):8366-8371.
[23] Kautto J, Saukkonen E, Henricson K. Digestibility and papermaking properties of prehydrolyzed softwood chips[J].Bioresources, 2010, 5(4):2502-2519.
[24]刘玉,詹怀宇,陈嘉川.三倍体毛白杨EMCC蒸煮中木素结构变化[J].中国造纸学报, 2008, 23(2):1-5.Liu Y, Zhan H Y, Chen J C. Lignin structural changes during EMCC pulping of the triploid of polulus tomentosa[J].Transactions of China Pulp&Paper, 2008, 23(2):1-5.
[25] Jiang X, Hou Q, Liu W, et al. Hemicelluloses removal in autohydrolysis pretreatment enhances the subsequent alkali impregnation effectiveness of poplar sapwood[J]. Bioresource Technology, 2016, 222:361.
[26] Xu N, Liu W, Hou Q, et al. Effect of autohydrolysis on the wettability, absorbility and further alkali impregnation of poplar wood chips[J]. Bioresource Technology, 2016, 216:317-322.
[27] Li J, Henriksson G, Gellerstedt G. Lignin depolymerization/repolymerization and its critical role for delignification of aspen wood by steam explosion[J]. Bioresource Technology, 2007, 98(16):3061-3068.
[28] Ko J K, Kim Y, Ximenes E, et al. Effect of liquid hot water pretreatment severity on properties of hardwood lignin and enzymatic hydrolysis of cellulose[J]. Biotechnology&Bioengineering, 2015, 112(2):252-262.
[29] Villaverde J J, Li J, Ek M, et al. Native lignin structure of Miscanthus x giganteus and its changes during acetic and formic acid fractionation[J]. Journal of Agricultural&Food Chemistry,2009, 57(14):6262.
[30] Dashtban M, Gilbert A, Fatehi P. A combined adsorption and flocculation process for producing lignocellulosic complexes from spent liquors of neutral sulfite semichemical pulping process[J].Bioresource Technology, 2014, 159(5):373.
[2] Vazquez M J, Garrote G, Alonso J L, et al. Refining of autohydrolysis liquors for manufacturing xylooligosaccharides:evaluation of operational strategies[J]. Bioresource Technology,2005, 96(8):889.
[3] Xu F, Sun J X, Geng Z C, et al. Comparative study of watersoluble and alkali-soluble hemicelluloses from perennial ryegrass leaves(Loliumperee)[J]. Carbohydrate Polymers, 2007, 67(1):56-65.
[4] Bian J, Peng F, Peng P, et al. Isolation and fractionation of hemicelluloses by graded ethanol precipitation from Caragana korshinskii[J]. Carbohydrate Research, 2010, 345(6):802-809.
[5] Canilha L, Carvalho W, Md F, et al. Xylitol production from wheat straw hemicellulosic hydrolysate:hydrolysate detoxification and carbon source used for inoculum preparation.[J]. Brazilian Journal of Microbiology, 2008, 39(2):333-336.
[6] Huang H J, Ramaswamy S, Al-Ajani W W, et al. Process modeling and analysis of pulp mill-based integrated biorefinery with hemicellulose pre-extraction for ethanol production:a comparative study[J]. Bioresource Technology, 2010, 101(2):624.
[7] Lin Q J. Preparation of wood adhesive from sulfate pulping black liquid[J]. Transactions of China Pulp&Paper, 2005, 20(1):106-110.
[8]韩亮.木聚糖硫酸酯化条件及木聚糖硫酸酯抗凝血活性研究[D].无锡:江南大学, 2005.Han L. Study on sulfation conditions of xylan and anticoagulant activity of xylan sulfate[D]. Wuxi:Jiangnan University, 2005.
[9] Kaisu L, Peter S, Andrey P, et al. Pressurized hot water extraction of Norway spruce hemicelluloses using a flow-through system[J].Wood Science&Technology, 2011, 45(2):223-236.
[10] Weinwurm F, Turk T, Denner J, et al. Combined liquid hot water and ethanol organosolv treatment of wheat straw for extraction and reaction modeling[J]. Journal of Cleaner Production, 2017, 165:1473-1484.
[11] Gutsch J S, Nousiainen T, Sixta H. Comparative evaluation of autohydrolysis and acid-catalyzed hydrolysis of Eucalyptus globulus wood[J]. Bioresource Technology, 2012, 109(2):77.
[12] Lu H F, Hu R F, Ward A, et al. Hot-water extraction and its effect on soda pulping of aspen woodchips[J]. Biomass&Bioenergy,2012, 39(8):5-13.
[13] Wang Z, Jiang J, Wang X, et al. Selective removal of phenolic lignin derivatives enables sugars recovery from wood prehydrolysis liquor with remarkable yield[J]. Bioresource Technology, 2014, 174(174C):198-203.
[14] Wang X, Zhuang J, Fu Y, et al. Separation of hemicellulosederived saccharides from wood hydrolysate by lime and ion exchange resin[J]. Bioresource Technology, 2016, 206:225-230.
[15] Saeed A, Jahan M S, Li H, et al. Mass balances of components dissolved in the pre-hydrolysis liquor of kraft-based dissolving pulp production process from Canadian hardwoods[J]. Biomass&Bioenergy, 2012, 39(4):14-19.
[16] Brasch D J, Free K W. Prehydrolysis-kraft pulping of pinus radiata grown in New Zealand[J]. Tappi, 1965, 48(4):245-248.
[17] Sixta H A. Handbook of Pulp:Kraft Pulping Kinetics[M].Weinheim:Wiley-VCH, 2006:185
[18]石淑兰,何福望.制浆造纸分析与检测[M].北京:中国轻工业出版社, 2003:35-110.Shi S L, He F W. Analysis and Detection of Pulping and Papermaking[M]. Beijing:China Light Industry Press, 2003:35-110
[19] Howard J, Rackemann D W, Zhang Z, et al. Effect of pretreatment on the formation of 5-chloromethyl furfural derived from sugarcane bagasse[J]. RSC Advances, 2016, 6(7):5240-5248.
[20]戴涛.硫酸盐法制浆黑液及主要组分的热解特性研究[D].广州:华南理工大学, 2013.Dai T. Pyrolysis characteristics of main organic components of kraft pulping black liquor[D]. Guangzhou:South China University of Technology, 2013.
[21] Geoffroy T R, Fortin Y, Stevanovic T. Hot-water extraction optimization of sugar maple(Acer saccharum Marsh.)and red maple(Acer rubrum L.)bark applying principal component analysis[J]. Journal of Wood Chemistry&Technology, 2017, 37(4):261-272.
[22] Li Y, Liu W, Hou Q, et al. Release of acetic acid and its effect on the dissolution of carbohydrates in the autohydrolysis pretreatment of poplar prior to chemi-thermomechanical pulping[J]. Industrial&Engineering Chemistry Research, 2014, 53(20):8366-8371.
[23] Kautto J, Saukkonen E, Henricson K. Digestibility and papermaking properties of prehydrolyzed softwood chips[J].Bioresources, 2010, 5(4):2502-2519.
[24]刘玉,詹怀宇,陈嘉川.三倍体毛白杨EMCC蒸煮中木素结构变化[J].中国造纸学报, 2008, 23(2):1-5.Liu Y, Zhan H Y, Chen J C. Lignin structural changes during EMCC pulping of the triploid of polulus tomentosa[J].Transactions of China Pulp&Paper, 2008, 23(2):1-5.
[25] Jiang X, Hou Q, Liu W, et al. Hemicelluloses removal in autohydrolysis pretreatment enhances the subsequent alkali impregnation effectiveness of poplar sapwood[J]. Bioresource Technology, 2016, 222:361.
[26] Xu N, Liu W, Hou Q, et al. Effect of autohydrolysis on the wettability, absorbility and further alkali impregnation of poplar wood chips[J]. Bioresource Technology, 2016, 216:317-322.
[27] Li J, Henriksson G, Gellerstedt G. Lignin depolymerization/repolymerization and its critical role for delignification of aspen wood by steam explosion[J]. Bioresource Technology, 2007, 98(16):3061-3068.
[28] Ko J K, Kim Y, Ximenes E, et al. Effect of liquid hot water pretreatment severity on properties of hardwood lignin and enzymatic hydrolysis of cellulose[J]. Biotechnology&Bioengineering, 2015, 112(2):252-262.
[29] Villaverde J J, Li J, Ek M, et al. Native lignin structure of Miscanthus x giganteus and its changes during acetic and formic acid fractionation[J]. Journal of Agricultural&Food Chemistry,2009, 57(14):6262.
[30] Dashtban M, Gilbert A, Fatehi P. A combined adsorption and flocculation process for producing lignocellulosic complexes from spent liquors of neutral sulfite semichemical pulping process[J].Bioresource Technology, 2014, 159(5):373.
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