Effect of ionic liquid micro emulsion pretreatment on rice straw at ultra-high pressure

doi:10.11949/j.issn.0438-1157.20171550

Abstract

Abstract:

Rice straw was pretreated by ultra-high pressure (UHP), ionic liquid micro emulsion (ILM), and ILM in UHP environment (ILM+UHP) at mild temperatures. The effect of the pretreatments on the chemical composition, crystalline structure, surface morphology and enzymatic hydrolysis of rice straw were investigated. The results show that after the pretreatment with 1-ethyl-3-methylimidazolium acetate/cyclohexane/Triton X-100/n-butanol ILM at 500 MPa, 50℃, for 4 h, 61.5% of the lignin was removed, crystallinity index was reduced by 17.3%, the surface was coarse and porous, and the reducing sugar yield achieved 75.3%.

Key words: biomass, ionic liquids, micro emulsion, ultra-high pressure, pretreatment, hydrolysis

摘要：

以水稻秸秆为原料，对比了中低温条件下单独超高压（UHP）、单独离子液体微乳液（ILM）和超高压环境下离子液体微乳液（ILM+UHP）3种预处理方法，系统分析了预处理前后样品的化学组成、晶体结构、表面形貌以及酶水解的变化规律。结果表明，采用1-乙基-3甲基咪唑醋酸盐/环己烷/TX-100/正丁醇微乳液处理水稻秸秆，在压强为500 MPa、温度为50℃下处理4 h后，样品中木质素去除率为61.5%，纤维素结晶度指数下降17.3%，微观表面粗糙多孔，酶水解48 h的还原糖产率达75.3%。

关键词: 生物质, 离子液体, 微乳液, 超高压, 预处理, 水解

CLC Number:

TQ352.78

GAO Jing, ZHENG Caiju, TAN Tingru, ZHANG Di, LIU Shucheng, JI Hongwu. Effect of ionic liquid micro emulsion pretreatment on rice straw at ultra-high pressure[J]. CIESC Journal, 2018, 69(8): 3686-3692.

高静, 郑才菊, 谈婷如, 张迪, 刘书成, 吉宏武. 超高压环境下离子液体微乳液预处理对水稻秸秆的影响[J]. 化工学报, 2018, 69(8): 3686-3692.

References 35

[1]	JOHN R P, ANISHA G S, NAMPOOTHIRI K M, et al. Micro and macroalgal biomass:a renewable source for bioethanol[J]. Bioresour. Technol., 2011, 102:186-193.
[2]	LYNAM J G, CHOW G K, HYLAND P L, et al. Corn stover pretreatment by ionic liquid and glycerol mixtures with their density, viscosity, and thermogravimetric properties[J]. ACS Sustain. Chem. Eng., 2016, 4:3786-3793.
[3]	CHANG K L, CHEN X M, HAN Y J, et al. Synergistic effects of surfactant-assisted ionic liquid pretreatment rice straw[J]. Bioresour. Technol., 2016, 214:371-375.
[4]	MAI N L, HA S H, KOO Y M. Efficient pretreatment of lignocellulose in ionic liquids/co-solvent for enzymatic hydrolysis enhancement into fermentable sugars[J]. Process Biochem., 2014, 49:1144-1151.
[5]	JIANG L Q, FANG Z, LI X K, et al. Combination of dilute acid and ionic liquid pretreatments of sugarcane bagasse for glucose by enzymatic hydrolysis[J]. Process Biochem., 2013, 48:1942-1946.
[6]	ASAKAW A, OKA T, SASAKI C, et al. Cholinium ionic liquid/cosolvent pretreatment for enhancing enzymatic saccharification of sugarcane bagasse[J]. Ind. Crop. Prod., 2016, 86:113-119.
[7]	ASWATHY U S, SUKUMARAN R K, DEVI G L, et al. Bio-ethanol from water hyacinth biomass:an evaluation of enzymatic saccharification strategy[J]. Bioresour. Technol., 2010, 101:925-930.
[8]	GAO J, CHEN L, YAN Z C, et al. Effect of ionic liquid pretreatment on the composition, structure and biogas production of water hyacinth (Eichhornia crassipes)[J]. Bioresour. Technol., 2013, 132:361-364.
[9]	GAO J, CHEN L, YUAN K, et al. Ionic liquid pretreatment to enhance the anaerobic digestion of lignocellulosic biomass[J]. Bioresour. Technol., 2013, 150:352-358.
[10]	TEGHAMMAR A, YNGVESSON J, LUNDIN M, et al. Pretreatment of paper tube residuals for improved biogas production[J]. Bioresour. Technol., 2010, 101:1206-1212.
[11]	LIMAYEM A, RICKE S C. Lignocellulosic biomass for bioethanol production:current perspectives, potential issues and future prospects[J]. Prog. Energy Combust., 2012, 38:449-467.
[12]	MOOD S H, GOLFESHAN A H, TABATABAEI M, et al. Lignocellulosic biomass to bioethanol, a comprehensive review with a focus on pretreatment[J]. Renew. Sust. Energy Rev., 2013, 27:77-93.
[13]	高静. 含极性非质子溶剂的离子液体预处理木质纤维素及其双水相法回收研究[D]. 广州:华南理工大学, 2014. GAO J. Ionic liquid pretreatment of lignocellulosic biomass and aqueous biphasic system for ionic liquid recycle in the presence of polar aprotic solvent[D]. Guangzhou:South China University of Technology, 2014.
[14]	CARA C, RUIZ E, OLIVA J M, et al. Conversion of olive tree biomass into fermentable sugars by dilute acid pretreatment and enzymatic saccharification[J]. Bioresour. Technol., 2008, 99:1869-1876.
[15]	HOU Q D, JU M T, LI W Z, et al. Pretreatment of lignocellulosic biomass with ionic liquids and ionic liquid-based solvent systems[J]. Molecules, 2017, 22:490-514.
[16]	CHANG K L, CHEN X M, WANG X Q, et al. Impact of surfactant type for ionic liquid pretreatment on enhancing delignification of rice straw[J]. Bioresour. Technol., 2017, 227:388-392.
[17]	AID T, SYVARINEN S, VAHER M, et al. Saccharification of lignocellulosic biomasses via ionic liquid pretreatment[J]. Ind. Crop. Prod., 2016, 92:336-341.
[18]	LI C, KNIERIM B, MANISSERI C, et al. Comparison of dilute acid and ionic liquid pretreatment of switchgrass:biomass recalcitrance, delignification and enzymatic saccharification[J]. Bioresour. Technol., 2010, 101:4900-4906.
[19]	NINOMIYA K, YAMAUCHI T, OGINO C, et al. Microwave pretreatment of lignocellulosic material in cholinium ionic liquid for efficient enzymatic saccharification[J]. Biochem. Eng. J., 2014, 90:90-95.
[20]	XU F, CHEN L, WANG A L, et al. Influence of surfactant-free ionic liquid microemulsions pretreatment on the composition, structure and enzymatic hydrolysis of water hyacinth[J]. Bioresour. Technol., 2016, 208:19-23.
[21]	PHUNCHAISRI C, APICHARTSRANGKOON A. Effects of ultra-high pressure on biochemical and physical modification of lychee (Litchi chinensis Sonn.)[J]. Food Chem., 2005, 93:57-64.
[22]	SUAREZ JACOBO A, RUEFER C E, GERVILLA R, et al. Influence of ultra-high pressure homogenisation on antioxidant capacity, polyphenol and vitamin content of clear apple juice[J]. Food Chem., 2011, 127:447-454.
[23]	BUTZ P, FERNANDEZ GARCIA A, LINDAUER R, et al. Influence of ultra high pressure processing on fruit and vegetable products[J]. J. Food Eng., 2003, 56:233-236.
[24]	KIM H S, KIM B Y, BAIK M Y. Application of ultra high pressure (UHP) in starch chemistry[J]. Crit. Rev. Food Sci., 2012, 52:123-141.
[25]	YANG B, JIANG Y M, WANG R, et al. Ultra-high pressure treatment effects on polysaccharides and lignins of longan fruit pericarp[J]. Food Chem., 2009, 112:428-431.
[26]	周刚. 含离子液体微乳液体系下淀粉纳米微球的制备及性质研究[D]. 广州:华南理工大学, 2014. ZHOU G. Study on preparation and characterization of starch nanoparticle in ionic liquid based microemulsions[D]. Guangzhou:South China University of Technology, 2014.
[27]	SLUITER A, HAMES B, RUIZ R, et al. Determination of structural carbohydrates and lignin in biomass. NREL/TP-510-42618[S]. National Renewable Energy Laboratory (NREL), Golden, Colorado, 2008
[28]	GAO J, CHEN L, ZHANG J, et al. Improved enzymatic hydrolysis of lignocellulosic biomass through pretreatment with plasma electrolysis[J]. Bioresour. Technol., 2014, 171:469-471.
[29]	QIU Z, AITA G M. Pretreatment of energy cane bagasse with recycled ionic liquid for enzymatic hydrolysis[J]. Bioresour. Technol., 2013, 129:532-537.
[30]	SHILL K, PADMANABHAN S, XIN Q, et al. Ionic liquid pretreatment of cellulosic biomass:enzymatic hydrolysis and ionic liquid recycle[J]. Biotechnol. Bioeng., 2011, 108:511-520.
[31]	LI L, YANG R D, LIU D T, et al. Influence of combined pretreatment of quadrol and anhydrous ionic liquid microemulsion on the physicochemical property of masson pine[J]. J. Appl. Polym. Sci., 2014, 131:985-987.
[32]	王琳琳, 魏立纲, 马英冲, 等. 1-丁基-3-甲基咪唑氯盐离子液体水溶液对纤维素的作用[J]. 化工学报, 2015, 66(S1):32-37. WANG L L, WEI L G, MANG Y C, et al. Effect of 1-butyl-3-methylimidazolium chloride-water mixtures on cellulose[J]. CIESC Journal, 2015, 66(S1):32-37.
[33]	CHEN B Y, ZHAO B C, LI M F, et al. Fractionation of rapeseed straw by hydrothermal/dilute acid pretreatment combined with alkali post-treatment for improving its enzymatic hydrolysis[J]. Bioresour. Technol., 2017, 225:127-133.
[34]	覃锦程, 郝学密, 刘黎阳, 等. 瞬间弹射蒸汽爆破增强离子液体对水稻秸秆的预处理效果[J]. 化工学报, 2015, 66(S1):302-307. QIN J C, HAO X M, LIU L Y, et al. Enhanced effects of ionic liquid pretreatment on rice straw by instant catapult steam explosion[J]. CIESC Journal, 2015, 66(S1):302-307.
[35]	SHILL K, PADMANABHAN S, XIN Q, et al. Ionic liquid pretreatment of cellulosic biomass:enzymatic hydrolysis and ionic liquid recycle[J]. Biotechnol. Bioeng., 2011, 108:511-520.