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首页> 外文期刊>Industrial Crops and Products >Fractionation of herbaceous biomass using a recyclable hydrotropic p-toluenesulfonic acid (p-TsOH)/choline chloride (ChCl) solvent system at low temperatures
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Fractionation of herbaceous biomass using a recyclable hydrotropic p-toluenesulfonic acid (p-TsOH)/choline chloride (ChCl) solvent system at low temperatures

机译：在低温下使用可再循环水辐射对甲苯磺酸（P-TSOH）/胆碱氯化胆碱（CHCL）溶剂（CHCL）溶剂系统的草本生物质的分馏

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摘要

Lignin valorization is significantly influenced by the degrees of lignin condensation measured by the amount of cleaved beta-O-4 ether linkages and interunit C-C linkages formed during biomass fractionation. To minimize the cleavage of aryl ether and formation of C-C linkages, a p-toluenesulfonic acid (p-TsOH)/choline chloride (ChCl) solvent system with hydrotropic properties was evaluated. The ChC1 was chosen to control the H+ concentration of the p-TsOH/ChCl solvent system. Compared with p-TsOH/H2O, the degradation of beta-O-4 was kept in a similar rate during p-TsOH/ChCl fractionation; however, the formation of C-C linkage was slower. Under 75/25 p-TsOH/ChCl mass ratio at 80 degrees C for 20 min, 76.6 % of miscanthus lignin, with beta-O-4 content of 30.9 %, and 88.9 % of wheat straw lignin, with beta-O-4 content of 33.6 %, can be dissolved. In addition, the low polar and layered structure of hydrotropic p-TsOH/ChCl system has a strong ability to dissolve lignin, which resulted in lignin with larger particle size and lower surface charge. The results also indicated that lignin from p-TsOH/ChCl solvent system has great potential for lignin depolymerization to aromatics for valorization.
机译：通过通过切割的β-O-4醚键的量测量的木质素凝聚程度和在生物质分馏期间形成的间歇性C-C键来显着影响木质素储存。为了最小化芳基醚的切割和C-C键的形成，评价具有水辐射性质的对甲苯磺酸（P-TSOH）/胆碱氯化物（CHCL）溶剂体系。选择CHC1以控制p-TSOH / CHCl溶剂系统的H +浓度。与P-TSOH / H 2 O相比，在P-TSOH / CHCL分馏期间，在类似速率下保持β-O-4的降解;然而，C-C连杆的形成较慢。在80℃下的75/25 p-tsoh / chcl质量比下，β-O-4含量为76.6％，β-O-4含量为30.9％，麦秸木质素的88.9％，具有β-O-4含量为33.6％，可以溶解。此外，水辐射P-TSOH / CHCL系统的低极性和分层结构具有较强的溶解木质素的能力，导致木质素具有较大的粒度和较低的表面电荷。结果还表明，来自P-TSOH / CHCL溶剂系统的木质素具有巨大潜力，使木质素脱聚对芳烃芳烃。

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