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.

0929970Amarasekara 该项目的目标是开发一种高效且环保的水解方法，可用于从木质纤维素生物质生产葡萄糖和其他可发酵糖。由丰富的木质纤维素生物质产生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，该溶剂系统可以轻松溶解木质纤维素生物质并充当水解催化剂。项目初期将以1-甲基咪唑、三乙醇胺和吡啶为碱合成三种不同类型的酸性离子液体。将测试这些酸性离子液体在热、微波和超声处理条件下溶解纤维素的能力。然后用水将所得的纤维素酸性离子液体溶液稀释至临界浓度，并通过离子液体中的内部-SO3H基团作为催化剂进行水解。水解过程中产生的葡萄糖及其低聚物将通过 HPLC 进行分析。此外，形成的总还原糖将通过3,5-二硝基水杨酸或碱性铜方法进行分析。该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，然后对纤维素的溶解和水解进行类似的测试，以研究超酸基团的催化效果。在第三阶段，将研究使用酸性/超强酸离子液体将木质纤维素生物质（玉米秸秆、柳枝稷、芒草、木片）溶解和水解成可发酵糖。在该项目的第四阶段，将研究优化反应条件以产生最大产量的可发酵糖，以及这些酸性离子液体的回收和循环利用。该项目的智力优点是（a）酸性/超酸性离子液体是溶剂和催化剂，因此不会浪费酸，也不需要分离酸催化剂（b）在温和的温度和大气压下一步溶解和水解（c）超强酸离子液体是一个新颖的概念。该项目更广泛的影响是 (a) 少数族裔的参与，因为该项目将在 Prairie View A&M 大学进行，该大学是一所历史悠久的黑人大学 (b) 博士后研究员、研究生和本科生将参与该项目，为他们提供专业发展、研究培训和教育 (c) 通过在会议、小组会议和期刊出版物上介绍成果，广泛传播有关可持续能源技术的知识。