Dilute sulfuric acid pretreatment of cardoon for ethanol production
Dilute sulfuric acid pretreatment of cardoon for ethanol production
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DOI：
10.1016/j.bej.2008.06.001
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发表时间：
2008-10-15
影响因子：
3.9
通讯作者：
Saez, Felicia
中科院分区：
文献类型：
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作者：
Ballesteros, Ignacio;Ballesteros, Mercedes;Saez, Felicia
洋蓟（Cynara cardunculus L.）是一种原产于地中海地区的草本植物，可以被认为是一种潜在的木质纤维素原料，用于生物燃料和高附加值产品。根据Box-Behnken实验设计，使用响应面方法研究温度（160-200 ℃）、酸负载（0- 0.2%，w/w）和固/液比（5- 10%，w/v）对总糖产率的影响。在180 ℃、0.1%（w/v）酸添加量和7.5%（w/v）固体浓度下，总木糖产率达到原料中含量的90%的最大值。关于总的葡萄糖产率，最好的结果是在200 ℃，0.2%（w/w）的酸负荷和7.5%（w/v）的固体浓度。根据统计优化，使总葡萄糖和木糖产率最大化的最佳条件为184.5 ℃和0.15%（w/v）酸浓度。在这些条件下，可以分别回收70%和93%的葡萄糖和木糖。当生物质在200 ℃下用0.2%硫酸预处理时，获得最高的同时糖化和发酵（SSF）产率，达到接近理论值的65%。(C)2008 Elsevier B. V.保留所有权利。
Cardoon (Cynara cardunculus L.) is an herbaceous species originating in the Mediterranean area that can be considered as a potential lignocellulosic feedstock for biofuels and high added value products.In this work, cardoon biomass (stems and leaves) was pretreated with dilute sulfuric acid in a batch reactor. The effect of temperature (160-200 C), acid loading (0-0.2%, w/w) and solid/liquid ratio (5-10%, w/v) on overall sugar yields was studied using a response surface method according to a Box-Behnken experimental design. Overall xylose yield reaches a maximum of 90% of the content in raw material at 180 C and 0.1% (w/v) acid addition and 7.5% (w/v) solid concentration. Regarding overall glucose yield, best results were achieved at 200 C.0.2% (w/w) acid loading and 7.5% (w/v) solid concentration. According to statistical optimization used optima conditions to maximize both overall glucose and xylose yield were 184.5 C and 0.15% (w/v) acid concentration. At these conditions, 70% and 93% of glucose and xylose, respectively, could be recovered. The highest simultaneous saccharification and fermentation (SSF) yields are obtained when biomass was pretreated at 200 C with 0.2% sulfuric acid reaching values close to 65% of theoretical. (C) 2008 Elsevier B.V. All rights reserved.