当前位置: X-MOL 学术Ind. Crops Prod. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Biorefinery on-demand: Modulating pretreatments to recover lignin, hemicellulose, and extractives as co-products during ethanol production
Industrial Crops and Products ( IF 5.6 ) Pub Date : 2021-02-21 , DOI: 10.1016/j.indcrop.2021.113336
Eupídio Scopel , Camila A. Rezende

In this work, we designed three scenarios to obtain ethanol as the main product from an elephant grass biorefinery and maximize the recovery of extractives, hemicellulose, and lignin. Common pretreatment methodologies, such as diluted acid and alkaline treatments, ball milling and pressurized liquid extractions (PLE) were combined to provide a detailed quantification of the products obtained in each step, enabling an assertive choice for further decision-making depending on the demand for specific products. Scenario 1 was based on an alkaline treatment at mild conditions (85 °C for 20 min, followed by ball milling) and stood out as the most efficient setup for ethanol production (up to 100 kg of ethanol/ton biomass). Scenario 2 was elaborated by adding a diluted acid step prior to the alkaline treatment, enabling the production of up to 77 kg of ethanol/ton biomass, together with the best fractionation results (up to 88 % of biomass use against the 28 % reported in an analogous process, but disregarding the co-products). Finally, the third scenario illustrates how the use of PLE combined with the alkaline treatment could be a clean alternative to recover biomass extractives (37–46 %) as well as produce up to 74 kg of ethanol/ton biomass. Therefore, this study could contribute to the development of greener and more sustainable biorefineries by properly forwarding their normally discarded residues and biomass components to high added-value applications.



中文翻译:

按需生物精炼:调节预处理以回收乙醇生产过程中副产物木质素,半纤维素和提取物

在这项工作中,我们设计了三种方案,以从象草生物精炼厂获取乙醇作为主要产品,并最大程度地提高提取物,半纤维素和木质素的回收率。结合了常用的预处理方法,例如稀酸和碱处理,球磨和加压液体萃取(PLE),可以对每个步骤中获得的产物进行详细的定量分析,从而可以根据需要做出果断的选择,以便做出进一步的决策具体产品。方案1是基于在温和条件下(85℃进行20分钟,然后进行球磨)进行的碱处理,并脱颖而出,成为最高效的乙醇生产装置(每吨生物质最多100公斤乙醇)。方案2通过在碱处理之前添加稀酸步骤进行了详细说明,能够生产多达77千克的乙醇/吨生物质,并具有最佳的分馏结果(在类似的过程中,高达88%的生物质使用,而类似方法中报道的28%,却不考虑副产品)。最后,第三种情况说明了PLE与碱处理结合使用如何可以作为一种清洁的替代方法来回收生物质提取物(37-46%),并生产多达74公斤的乙醇/吨生物质。因此,这项研究可以通过将正常丢弃的残渣和生物质成分适当地转移到高附加值的应用中,为绿色和可持续发展的生物精炼厂的发展做出贡献。第三种情况说明了将PLE与碱处理结合使用如何可以作为一种清洁的替代方法来回收生物质提取物(37-46%),并生产多达74千克的乙醇/吨生物质。因此,这项研究可以通过将正常丢弃的残渣和生物质成分适当地转移到高附加值的应用中,为绿色和可持续发展的生物精炼厂的发展做出贡献。第三种情况说明了将PLE与碱处理结合使用如何可以作为一种清洁的替代方法来回收生物质提取物(37-46%),并生产多达74千克的乙醇/吨生物质。因此,这项研究可以通过将正常丢弃的残留物和生物质成分适当地转移到高附加值的应用中,为绿色和可持续发展的生物精炼厂的发展做出贡献。

更新日期:2021-02-21
down
wechat
bug