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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 /自动水解预处理的生物精炼厂中椰子废料和仙人掌的评估，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：寻找新的木质纤维素原料来源以产生能量和新化合物，这鼓励寻找像巴西东北地区那样不为人所知且具有高生物质可利用性的地点。因此，用NaClO2-C2H4O2和顺序NaClO2-C2H4O2 /自动水解法对仙人掌（CAC），绿色椰子壳（GCS），成熟椰子纤维和成熟椰子壳进行了预处理，目的是在液体馏分中获得高附加值的化合物。固相在用NaClO2-C2H4O2预处理的材料中，固相的收率在61.42％至90.97％之间，木质素的还原率高达91.63％。在NaClO 2 -C 2 H 4 O 2 /自动水解预处理之后，获得的固体收率在43.57和52.08％之间，半纤维素含量的增溶高达81.42％。对于两种预处理，纤维素含量几乎保持不变。预处理的固体通过SEM，X射线和结晶度进行表征，显示在进行预处理时会发生明显的变化。通过分别用NaClO2-C2H4O2预处理和NaClO2-C2H4O2 /自动水解预处理的LCM的酶转化率分别为81.68-90.03和86.97-90.36％，进一步证实了这些结果。所得液体的总酚类化合物含量为0.20至3.05g / L，回收的木质素最高为7.40g / L（不含硫），木糖寡糖的含量为16.13至20.37g / L。因此，这些预处理显示了LCM的有效分级分离，特别是在GCS中，这是在生物精炼厂中生成产物和副产物的重要要求。[GRAPHICS]。

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