Hydrolysis of Cellulose and Lignocellulosic Biomass into Fermentable Sugars using Acidic Ionic Liquid Medium

使用酸性离子液体介质将纤维素和木质纤维素生物质水解成可发酵糖

• 批准号: 0929970
• 负责人: Ananda Amarasekara
• 金额: $ 15.03万
• 依托单位: Prairie View A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-01-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0929970&HistoricalAwards=false
• 关键词: Hydrolysis; Cellulose; Lignocellulosic; Biomass; into

0929970AmarasekaraThe goal of this project is to develop an efficient and environmentally sound hydrolysis method useful for the production of glucose and other fermentable sugars from lignocellulosic biomass. The glucose and other fermentable sugars produced from abundant lignocellulosic biomass provide an economical path to ethanol production. This anticipated goal would be achieved by the development of a recyclable acidic ionic liquid solvent system that can easily dissolve lignocellulosic biomass and act as the hydrolysis catalyst as well. In the initial stage of the project three different types of acidic ionic liquids will be synthesized by using 1-methylimidazole, triethanolamine and pyridine as bases. These acidic ionic liquids will be tested for their ability to dissolve cellulose under thermal, microwave, and sonication conditions. The resulting cellulose-acidic ionic liquid solutions will be then diluted with water to a critical concentration and allowed to hydrolyze by the internal -SO3H group in the ionic liquid, acting as the catalyst. Glucose and its oligomers produced in the hydrolysis will be analyzed by HPLC. Furthermore, the total reducing sugars formed will be analyzed by 3,5-dinitrosalicylic acid or alkaline copper methods. In the second stage of the project acidic ionic liquids with a built-in superacid group (-CF2-SO3H) will be synthesized and then similarly tested for the dissolution and hydrolysis of cellulose to study the catalytic effect of the superacid group. In the third phase, the use of acidic/superacid ionic liquids for the dissolution and hydrolysis of lignocellulosic biomass (corn stover, switch grass, miscanthus grass, wood chips) to fermentable sugars will be investigated. In the fourth phase of the project optimization of reaction conditions to produce the maximum yield of fermentable sugars, recovery and recycling of these acidic ionic liquids will be studied.The intellectual merits of the project are (a) acidic/superacid ionic liquid is the solvent and the catalyst as well, therefore no waste in acid and no separation of acid catalyst is necessary (b) single step dissolution and hydrolysis under mild temperatures and atmospheric pressure (c) superacid ionic liquid is a novel concept. Broader impacts of the project are (a) participation of minorities, as this project will be carried out at Prairie View A&M University, which is a historically black university (b) postdoctoral research associates, graduate and undergraduate students will participate in the project providing them professional development, research training and education (c) broad dissemination of knowledge about sustainable energy technologies by presentation of the results at conferences, group meetings, and publications in journals.

该项目的0929970AMARASEKARATHE目标是开发一种有效且环保的水解方法，可用于生产木质纤维素生物量的葡萄糖和其他可发酵糖。由丰富的木质纤维素生物量生产的葡萄糖和其他可发酵糖为乙醇生产提供了经济的途径。这一预期的目标将通过开发可回收的酸性离子液体溶剂系统来实现，该系统可以轻松地溶解木质纤维素生物量并充当水解催化剂。在项目的初始阶段，将通过使用1-甲基咪唑，三乙醇胺和吡啶作为碱来合成三种不同类型的酸性离子液体。这些酸性离子液体将测试其在热，微波和超声处理条件下溶解纤维素的能力。然后将所得的纤维素 - 酸离子液体溶液用水稀释至临界浓度，并被离子液体中的内部-SO3H组水解，并用作催化剂。 HPLC将分析水解中产生的葡萄糖及其低聚物。此外，形成的总还原糖将通过3,5-二硝基水杨酸或碱性铜法分析。在项目的第二阶段，将合成具有内置超酸基团（-CF2-SO3H）的酸性离子液体（-CF2-SO3H），然后类似地测试以研究纤维素的溶解和水解，以研究超酸基团的催化作用。在第三阶段，将研究将使用酸性/超酸离子液体溶解和水解木质纤维素生物量（玉米秸秆，开关草，豆类草，木屑）来发酵糖。在项目优化反应条件的第四阶段中，将研究这些酸性离子液体的最大产量，恢复和回收利用这些酸性离子液体的恢复和回收。该项目的智力优点是（a）酸性/超酸离子液体是溶剂的溶剂，也是催化剂，因此在酸中的降低了酸度，因此降低了酸和酸的分离，而酸的单一步骤（b）是酸性分离的。 （c）超酸离子液体是一个新颖的概念。该项目的更广泛的影响是（a）少数群体的参与，因为该项目将在Prairie View A＆M大学（历史上是一所历史悠久的黑人大学（B）博士后研究协会，研究生和本科生参与该项目，从而为他们提供专业发展，研究和教育（c）对可持续能量技术的专业发展和教育的介绍，并在供应中进行了众多的临界，并在临时进行了研究，该临界的临界服务是众所周知的。