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首页> 外文期刊>Waste and biomass valorization >Valorization, Comparison and Characterization of Coconuts Waste and Cactus in a Bio refinery Context Using NaClO_2-C_2H_4O_2 and Sequential NaClO_2-C_2H_4O_2/Autohydrolysis Pretreatment
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Valorization, Comparison and Characterization of Coconuts Waste and Cactus in a Bio refinery Context Using NaClO_2-C_2H_4O_2 and Sequential NaClO_2-C_2H_4O_2/Autohydrolysis Pretreatment

机译：使用NaClO_2-C_2H_4O_2和顺序NaClO_2-C_2H_4O_2 /自水解预处理的生物炼油厂中椰子废料和仙人掌的储存，比较和表征。

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The search for new sources of lignocellulosic raw materials for the generation of energy and new compounds encourages the search for locations not well known and with a high potential for biomass availability as is the case of the Northeast Region of Brazil. Thus, the cactus (CAC), green coconut shell (GCS), mature coconut fibre and mature coconut shell were pretreated by NaClO2-C2H4O2 and sequential NaClO2-C2H4O2/autohydrolysis aiming at the obtention of high added-value compounds in the liquid fraction and solid phase. The yield of the solid phase was between 61.42 and 90.97% and the reduction up to 91.63% of lignin in the materials pretreated by NaClO2-C2H4O2. After NaClO2-C2H4O2/autohydrolysis pretreatment the obtained solids yield was between 43.57 and 52.08%, with a solubilization of the hemicellulose content up to 81.42%. For both pretreatments the cellulosic content remained almost unchanged. The pretreated solids were characterized by SEM, X-ray and crystallinity indexes showing significant modifications when submitted to pretreatments. These results were further confirmed by the enzymatic conversion yields of 81.68-90.03 and 86.97-90.36% of the LCMs pretreated by NaClO2-C2H4O2 and pretreated by NaClO2-C2H4O2/autohydrolysis, respectively. The resulting liquors had a total phenolic compounds content between 0.20 and 3.05g/L, lignin recovered up to 7.40g/L (absence of sulphur) and xylooligosaccharides between 16.13 and 20.37g/L. Thus, these pretreatments showed an efficient fractionation of LCMs, especially in the GCS, being an important requirement for the generation of products and byproducts in the context of the biorefinery.[GRAPHICS].
机译：寻找用于生成能量和新化合物的木质纤维素原料的新来源促进了寻找地点而不是众所周知的地点，并且在巴西东北地区的情况下具有高潜力的生物量可用性。因此，通过NaClO2-C2H4O2预处理仙人掌（CAC），绿色椰子壳（GCS），成熟的椰子纤维和成熟的椰子壳，并依次在液体分数中获得高附加值化合物的顺序NaClO2-C 2 H 4 O 2 /自动水解固相。固相的产率在61.42至90.97％之间，在NaClO2-C2H4O2预处理的材料中降低高达91.63％的木质素。在NaClO2-C2H4O2 /自水解预处理后，所得固体产率在43.57和52.08％之间，其半纤维素含量高达81.42％。对于两种预处理，纤维素含量仍然不变。预处理的固体的特征在于SEM，X射线和结晶度指数，所述结晶性指数显示出在提交预处理时的显着修饰。通过NaClO2-C2H4O2预处理的LCMS的酶促转化产率为81.68-90.03和86.97-90.36％并分别通过NaClO2-C 2 H 4 O 2 /自然水解物预处理来进一步证实这些结果。所得液体的总酚类化合物含量在0.20和3.05g / L之间，木质素恢复至7.40g / L（不存在硫）和16.13和20.37g / L之间的木质糖苷。因此，这些预处理显示了LCMS的有效分级，特别是在GCS中，是在生物术的背景下产生产品和副产物的重要要求。[图形]。

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