Hazardous Creosote Wood Valorization via Fractionation and Enzymatic Saccharification Coupled with Simultaneous Extraction of the Embedded Polycyclic Aromatic Hydrocarbons Using Protic Ionic Liquid Media
Hazardous Creosote Wood Valorization via Fractionation and Enzymatic Saccharification Coupled with Simultaneous Extraction of the Embedded Polycyclic Aromatic Hydrocarbons Using Protic Ionic Liquid Media
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DOI：
10.1021/acssuschemeng.0c06414
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发表时间：
2021-01-04
影响因子：
8.4
通讯作者：
Hallett, Jason P.
中科院分区：
文献类型：
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作者：
Abouelela, Aida R.;Hallett, Jason P.
本研究探讨了质子离子液体（IL）N，N，N-二甲基丁基硫酸氢铵[DMBA][HSO 4]的使用，以有效地评价和净化有害杂酚油处理的木材。我们发现，[DMBA][HSO 4]与20重量%的水混合能够分馏杂酚油处理的木材成富含纤维素的纸浆和木质素流在1：5 g g（-1）的高固体负载。预处理的严格程度起着至关重要的作用，在工艺分馏性能与脱木质素达到60%和酶糖化的纤维素丰富的纸浆，超过70%的理论最大值下实现的最高研究的预处理的严格条件（170摄氏度，45分钟，和20重量%的水含量作为助溶剂）。我们报告说，非疏水性质子IL [DMBA][HSO 4]是非常有效的提取多环芳烃（PAH）从嵌入在木材中的杂酚油，产生高度可消化的，无PAH的纤维素丰富的纸浆。PAH化合物在工艺流（原料，IL液，纤维素纸浆，和木质素）的命运的分析表明，高的趋势的PAH沉淀与木质素后，加入水作为抗溶剂。该研究展示了质子[HSO 4]基离子液体在分馏和净化杂酚油处理的未利用的危险生物质废物中的新应用，以生产廉价的高度可消化的纤维素底物用于第二代生物燃料生产。
This study investigates the use of the protic ionic liquid (IL) N,N,Ndimethylbutylammonium hydrogen sulfate [DMBA][HSO4] to effectively valorize and decontaminate hazardous creosote-treated timber. We found that [DMBA][HSO4] mixed with 20 wt % water is capable of fractionating creosote-treated timber into a cellulose-rich pulp and lignin stream at a high solid loading of 1:5 g g(-1). Pretreatment severity plays an essential role in the process fractionation performance with delignification reaching 60% and enzymatic saccharification of cellulose-rich pulps, exceeding 70% of the theoretical maximum achieved under the highest investigated pretreatment severity conditions (170 degrees C, 45 min, and 20 wt % water content as a cosolvent). We report that the nonhydrophobic protic IL [DMBA][HSO4] is highly effective in extracting polycyclic aromatic hydrocarbons (PAHs) from the creosote embedded in the timber, producing a highly digestible, PAH-free cellulose-rich pulp. Analysis of the fate of PAH compounds in the process streams (feedstock, IL liquor, cellulose pulp, and lignin) showed the high tendency of the PAHs to precipitate with lignin upon the addition of water as an antisolvent. The study demonstrates a novel application of protic [HSO4]-based ILs in fractionating and decontaminating creosote-treated, unutilized hazardous biomass waste to produce inexpensive highly digestible cellulose substrates for second-generation biofuel production.