Biomass recalcitrance towards pretreatment and further processing can be related to the compositional and structural features of the biomass. However, the exact role and relative importance to those structural attributes has still to be further evaluated. Herein, ten different types of biomass currently considered to be important raw materials for biorefineries were chosen to be processed by the recently developed, acid-catalyzed OrganoCat pretreatment to produce cellulose-enriched pulp, sugars, and lignin with different amounts and qualities. Using wet chemistry analysis and NMR spectroscopy, the generic factors of lignocellulose recalcitrance towards OrganoCat were determined. The different materials were processed applying different conditions (e.g., type of acid catalyst and temperature), and fractions with different qualities were obtained. Raw materials and products were characterized in terms of their compositional and structural features. For the first time, generic correlation coefficients were calculated between the measured chemical and structural features and the different OrganoCat product yields and qualities. Especially lignin-related factors displayed a detrimental role for enzymatic pulp hydrolysis, as well as sugar and lignin yield exhibiting inverse correlation coefficients. Hemicellulose appeared to have less impact, not being as detrimental as lignin factors, but xylan-O-acetylation was inversely correlated with product yield and qualities. These results illustrate the role of generic features of lignocellulosic recalcitrance towards acidic pretreatments and fractionation, exemplified in the OrganoCat strategy. Discriminating between types of lignocellulosic biomass and highlighting important compositional variables, the improved understanding of how these parameters affect OrganoCat products will ameliorate bioeconomic concepts from agricultural production to chemical products. Herein, a methodological approach is proposed.

中文翻译：

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木质纤维素对 OrganicCat 预处理和分馏的顽固性的多尺度分析。

生物质对预处理和进一步加工的抗拒可能与生物质的组成和结构特征有关。然而，这些结构属性的确切作用和相对重要性仍有待进一步评估。在此，选择了十种目前被认为是生物精炼厂重要原料的不同类型的生物质，通过最近开发的酸催化有机催化剂预处理工艺生产出不同数量和质量的富含纤维素的纸浆、糖和木质素。使用湿化学分析和 NMR 光谱，确定了木质纤维素对 OrganicCat 不顺的一般因素。使用不同的条件（例如酸催化剂的类型和温度）处理不同的材料，并获得具有不同质量的馏分。原材料和产品的特征在于其成分和结构特征。首次计算了测量的化学和结构特征与不同的 OrganicCat 产品产量和质量之间的通用相关系数。特别是木质素相关因素对酶促纸浆水解具有不利作用，并且糖和木质素产量表现出反相关系数。半纤维素的影响似乎较小，不像木质素因子那样有害，但木聚糖-O-乙酰化与产品产量和质量呈负相关。这些结果说明了木质纤维素顽固性对酸性预处理和分馏的一般特征的作用，如 OrganicCat 策略所示。区分木质纤维素生物质的类型并突出重要的组成变量，更好地理解这些参数如何影响 OrganoCat 产品将改善从农业生产到化学产品的生物经济概念。在此，提出了一种方法论方法。