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

PI：Amarasekara，Ananda Proposal编号：1336469机构：Prairie View A&amp；M University标题：酸性离子液体催化单反应器生物质转化为生物质原油本项目的目标是开发一种能源高效的可回收催化工艺，将生物质转化为生物原油，可通过催化加氢步骤将其转化为类似石油液体燃料的运输液体燃料。这一目标将通过开发一种可循环使用的催化剂来实现，该催化剂可以在温和的条件下通过单一反应器操作从木质纤维生物质中生产C5-C20范围内部分氧化的呋喃烯型生物原油。本项目基于这样一种假设，即酸性离子液体对解聚-脱水-羟醛缩合三个串联催化过程具有很好的可回收催化剂。首先，生物质中的纤维素和半纤维素在较低的温度下经历了磺酸功能化的酸性离子液体催化解聚为葡萄糖和木糖。在第二步中，催化剂将单糖脱水成呋喃混合物，即5-羟甲基呋喃和呋喃。第三，呋喃甲醛与丙酮在酸催化下发生羟醛缩合反应。复杂的产品将包括由呋喃和丙酮之间的交叉羟醛缩合生成的C5-C20系列化合物，以及丙酮自缩合产物。在本项目中，PI将制备一系列具有不同离子核结构、反离子和酸性基团的酸性离子液体催化剂，如-SO3H和-CF2-SO3H，并以不同长度的间隔基附着在离子液体结构上，以评价其在丙酮或异丁酮介质中于中等温度和压力下在单一反应器中催化木质纤维素生物质转化为呋喃生物原油的催化活性。主要特点包括：(A)-SO3H基功能化的Brnsted酸性离子液体是一种独特的催化剂，可以有效地催化纤维素水解、单糖脱水和羟醛缩合三个过程(B)所有这三个催化过程可以在一个反应器中串联进行(C)这些离子液体催化剂需要很低的催化剂负载量(D)Brnsted酸性离子液体催化剂具有高度的水溶性，可以很容易地从疏水原油产品中分离出来，因此这些催化剂几乎100%可回收，催化活性损失可以忽略不计(E)丙酮或异丁酮将作为溶剂/反应伙伴，这些酮可以从生物质资源中生产，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低的压力下进行，因此可以在简单的反应堆中进行，并节省能源。项目包括9)基础广泛的教育，以及为本科生和研究生提供的仪器技术、跨学科研究、生物质加工和可持续能源技术方面的前沿研究培训机会，特别是针对女性和在HBCU中代表性较低的少数民族。(B)PI和学生将积极参加地区、国家和国际会议，向更广泛的科学界介绍他们的研究成果，并将在广泛发行的期刊上发表(C)教育公众关于可持续能源以及如何减少对石油燃料的依赖(D)有可能开发一种经济的工业流程来生产第三代临时生物燃料，这种燃料可以在现有的炼油厂中提炼，并且应该在现有的内燃机和喷气发动机中工作，不需要或只需最小限度的修改。

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.