Acidic ionic liquid catalyzed single reactor conversion of biomass to biocrude oil

酸性离子液体催化单反应器生物质转化为生物原油

• 批准号: 1336469
• 负责人: Ananda Amarasekara
• 金额: $ 33.36万
• 依托单位: Prairie View A & M University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1336469&HistoricalAwards=false
• 关键词: Acidic; ionic; liquid; catalyzed; single

PI: Amarasekara, AnandaProposal Number: 1336469Institution: Prairie View A & M UniversityTitle: Acidic ionic liquid catalyzed single reactor conversion of biomass to biocrude oilObjective of this project is to develop an energy efficient recyclable catalytic process for transformation of biomass to biocrude oil, which can be converted to transportation liquid fuels similar to petroleum liquid fuels using a catalytic hydrogenation step. This goal will be achieved by the development of a recyclable catalyst that can produce C5-C20 range partially oxygenated furanic alkene type biocrude oil from lignocellulosic biomass in a single reactor operation under mild conditions. This project is based on the hypothesis, acidic ionic liquids are excellent recyclable catalysts for three tandem catalytic processes: depolymerization-dehydration-aldol condensation. First, cellulose and hemicelluloses in the biomass undergoes a sulfonic acid functionalized acidic ionic liquid catalyzed depolymerization to glucose and xylose at a relatively low temperature. In the second step catalyst will dehydrate the monosaccharides into a furan mixture, 5-hydroxymethylfurfural and furfural. Thirdly furan aldehydes will undergo acid catalyzed aldol condensation with acetone in the medium. The complex product will consist of C5-C20 range compounds resulting from cross aldol condensation between furans and acetone, as well as acetone self-condensation products. In this project the PI will prepare a series of acidic ionic liquid catalysts with a verity of ionic core structures, counter ions, and acidic groups such as -SO3H, and -CF2-SO3H, attached to the ionic liquid structure with spacer groups of different lengths, to evaluate their catalytic activities in the single reactor conversion of lignocellulosic biomass to furanic biocrude oil at moderate temperatures and pressures in acetone or 2-butanone medium. The key features include (a) -SO3H group functionalized Br nsted acid ionic liquids are a unique type of catalysts that can efficiently catalyze all three processes: cellulose hydrolysis, monosaccharide dehydration, and aldol condensation (b) all three catalytic processes can be carried out in tandem in a single reactor operation (c) very low catalyst loading is required for these ionic liquid catalysts (d) Br nsted acid ionic liquids catalysts are highly water soluble, can be easily separated from hydrophobic crude-oil product, therefore these catalysts are nearly 100% recyclable with negligible loss in catalytic activity (e) acetone or 2-butanone will be used as the solvent/ reaction partner, and these ketones can be produced from biomass resources, therefore all carbons in the final fuel product is originated from renewable resources (f) biocrude oil synthesis process can be carried out at mild temperatures and relatively low pressures, therefore can be carried out in a simple reactor, and saves energy.The project includes 9a) broad-based education, and cutting-edge research training opportunities in instrumentaltechniques, interdisciplinary research, biomass processing, and sustainable energy technologies for undergraduate and graduate students, particularly for women and underrepresented minorities in a HBCU (b) PI and students will actively participate in regional, national and international meetings to present their research to the broader scientific community, and will publish in widely circulated journals (c) educate the public on sustainable energy, and how to relieve the dependence on petroleum fuels (d) potential to develop an economical industrial process to produce third generation drop-in biofuels, which can be refined in existing oil refineries, and should work in current internal combustion and jet engines with no or minimum modifications.

PI：Amarasekara，Ananda提案编号：1336469机构：Prairie View A& M University职务：酸性离子液体催化单反应器生物质转化为生物原油本项目的目的是开发一种用于将生物质转化为生物原油的节能可循环催化工艺，生物原油可以使用催化加氢步骤转化为类似于石油液体燃料的运输液体燃料。这一目标将通过开发可再循环的催化剂来实现，该催化剂可以在温和条件下在单个反应器操作中由木质纤维素生物质生产C5-C20范围的部分氧化的呋喃烯烃型生物原油。本课题基于酸性离子液体是解聚-脱水-羟醛缩合三个串联催化过程的优良可循环催化剂的假设。首先，生物质中的纤维素和半纤维素在相对低的温度下经历磺酸官能化的酸性离子液体催化解聚成葡萄糖和木糖。在第二步中，催化剂将单糖转化为呋喃混合物、5-羟甲基糠醛和糠醛。呋喃醛在酸催化下与丙酮发生羟醛缩合反应。复杂产物将由呋喃和丙酮之间的交叉羟醛缩合产生的C5-C20范围的化合物以及丙酮自缩合产物组成。在本项目中，PI将制备一系列酸性离子液体催化剂，这些催化剂具有多种离子核心结构、抗衡离子和酸性基团，如-SO 3 H和-CF 2-SO 3 H，这些酸性基团通过不同长度的间隔基团连接到离子液体结构上，评价它们在中等温度和压力下在丙酮中将木质纤维素生物质转化为呋喃生物原油的单一反应器中的催化活性，或2-丁酮培养基。 主要特征包括（a）-SO 3 H基团官能化的Br nsted酸离子液体是一种独特类型的催化剂，可以有效地催化所有三个过程：纤维素水解，单糖脱水，和羟醛缩合（B）所有三种催化方法可以在单个反应器操作中串联进行（c）这些离子液体催化剂需要非常低的催化剂负载量（d）布朗斯台德酸离子液体催化剂是高度水溶性的，可以容易地从疏水性原油产物中分离，因此这些催化剂几乎是100%可回收的，催化活性的损失可以忽略不计。（e）丙酮或2-丁酮将被用作溶剂/反应伙伴，并且这些酮可以从生物质资源生产，因此，最终燃料产品中的所有碳都来自可再生资源。（f）生物原油合成过程可以在温和的温度和相对较低的压力下进行，因此可以在简单的反应器中进行，并节省能源。该项目包括9a）基础广泛的教育，以及仪器技术方面的尖端研究培训机会，为本科生和研究生，特别是HBCU中的妇女和代表性不足的少数民族开展跨学科研究、生物质加工和可持续能源技术（B）PI和学生将积极参加区域、国家和国际会议，向更广泛的科学界介绍他们的研究，并将在广泛发行的期刊上发表文章（c）教育公众了解可持续能源，以及如何减轻对石油燃料的依赖（d）开发一种经济的工业过程的潜力，以生产第三代直接使用的生物燃料，这种燃料可以在现有的炼油厂中提炼，并且应该在不作任何修改或作最小修改的情况下在现有的内燃机和喷气发动机中工作。