Design of low-cost ionic liquids for lignocellulosic biomass pretreatment
Design of low-cost ionic liquids for lignocellulosic biomass pretreatment
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DOI：
10.1039/c4gc01208a
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发表时间：
2015-01-01
期刊：
影响因子：
9.8
通讯作者：
Hallett, Jason P.
中科院分区：
文献类型：
--
作者：
George, Anthe;Brandt, Agnieszka;Hallett, Jason P.
离子液体的成本是影响离子液体在纤维素生物炼制中应用的主要因素之一，尤其是在预处理阶段。在这项研究中，合成了一些离子液体，其目标是优化溶剂成本和稳定性，同时展示有前途的加工潜力。为了实现这一点，廉价的原料，如硫酸和简单的胺组合成一系列的质子离子液体含有硫酸氢根[HSO 4]（-）阴离子。将这些离子液体的性能与含有IL 1-乙基-3-甲基咪唑鎓乙酸盐[C（2）C（1）im][OAc]的基准体系进行比较。对于硫酸氢三乙铵IL观察到最高的糖化产率，其为基准系统的75%有效。技术经济模型显示，这种有前途的，但尚未优化的产量是在一小部分的加工成本。这项研究表明，一些离子液体可以与最便宜的预处理化学品，如氨，在有效性和工艺成本方面，消除离子液体成本作为一个障碍，以IL为基础的生物精炼厂的经济可行性。
The cost of ionic liquids (ILs) is one of the main impediments to IL utilization in the cellulosic biorefinery, especially in the pretreatment step. In this study, a number of ionic liquids were synthesized with the goal of optimizing solvent cost and stability whilst demonstrating promising processing potential. To achieve this, inexpensive feedstocks such as sulfuric acid and simple amines were combined into a range of protic ionic liquids containing the hydrogen sulfate [HSO4](-) anion. The performance of these ionic liquids was compared to a benchmark system containing the IL 1-ethyl-3-methylimidazolium acetate [C(2)C(1)im][OAc]. The highest saccharification yields were observed for the triethylammonium hydrogen sulfate IL, which was 75% as effective as the benchmark system. Techno-economic modeling revealed that this promising and yet to be optimized yield was achieved at a fraction of the processing cost. This study demonstrates that some ILs can compete with the cheapest pretreatment chemicals, such as ammonia, in terms of effectiveness and process cost, removing IL cost as a barrier to the economic viability of IL-based biorefineries.