SNM: Scalable and Sustainable Hydrothermal Manufacturing of Nano-array based Low Temperature Diesel Oxidation Catalysts

高普贤，卢天风，任祝银，Steven sube美国康涅狄格大学热液处理由于节能，成本效益，简单和低操作温度（LOT）而成为一种潜在的经济的纳米制造方法。然而，水热处理的科学性质仍然难以理解，特别是纳米结构成核和生长、图案和自组装成器件形式的空间分布，这直接影响组装（器件）的产量、生长速度、均匀性和批次间的可重复性。该项目的目标是设计和验证一种基于三维纳米结构阵列（纳米阵列）的外能场辅助流动水热制造技术，用于连续、可扩展和可持续地合成一类新型单片催化剂，用于低温催化柴油氧化，并了解潜在的质量传递和生长反应化学。随着尺寸、形状和方向的明确，纳米阵列将基于选择性金属氧化物在单体上合成，目标从实验室规模、大规模到工业相关的制造阶段。搅拌间歇式和连续流反应器技术将结合生产速率加速的外部能量，如电场、微波和超声波辐射进行系统研究。计算流体动力学将用于设计和优化催化剂基于理论分析和数值模拟使用。详细的流场分布、化学动力学和实验验证将指导现场辅助生长反应器的设计和控制。各种金属掺杂将在纳米阵列上进行，以使LOT具有催化柴油氧化的活性和选择性。这些结构纳米催化剂将作为碳氢化合物和氮氧化物氧化的低温柴油氧化催化剂（DOC）进行测试和验证。该项目将为三维单片器件/系统级纳米材料组件的热力学、传输和生长行为提供新的见解，并通过外部能量场的实施加速。由此产生的结构纳米催化剂将为汽车工业提供急需的LOT DOCs，并将直接影响燃油经济性、能源和环境可持续性。这种阵列还将提供一个独特的设备平台，适用于化学，机械和生物技术行业。水热法制备的互补实验和模型研究可以应用于其他涉及溶液或气相的纳米制备案例。该项目强调跨学科的教育和培训，涉及材料科学、化学工程、化学和机械工程，以及与联合技术公司、优酷科、VeruTEK和ANSYS的强大工业合作伙伴关系。每年由pi和工业合作伙伴举办的“先进纳米材料：制造和加工”暑期研讨会将以社区大学生和高中教师为目标，他们最终将影响一些未被充分代表的少数民族学生，形成未来纳米制造业的潜在劳动力。夏季实验课程将在“孩子也是科学家”项目中为K-12学生开设。一个吗?Nano-Array催化剂?将建立主题网站，传播该项目的信息，并为公众设置单独的访问权限。在项目的第三年，一个国际会议将于？催化纳米材料制造？在康涅狄格大学。

CMMI-1344792Pu-Xian Gao, Tianfeng Lu, Zhuyin Ren, and Steven SuibUniversity of Connecticut Hydrothermal processing has emerged as a potentially economic method for nanomanufacturing, due to energy saving, cost effectiveness, simplicity and low operation temperature (LOT). However, the scientific nature of hydrothermal processing remains elusive, particularly on the spatial distribution of nanostructure nucleation and growth, patterning and self-assembly into device forms, which directly impact the assembly (device) yield, growth rate, uniformity, and batch-to-batch repeatability. The goal of this project is to design and validate an external-energy-field assisted flow hydrothermal manufacturing technique for continuous, scalable and sustainable syntheses of a new class of monolithic catalysts, based on three-dimensional (3-D) nanostructure arrays (nano-array), for low temperature catalytic diesel oxidation, and to understand the underlying mass transport and growth reaction chemistry. With well-defined size, shape and orientation, nano-arrays on monoliths will be synthesized based on selective metal oxides, targeting from the lab-scale, large-scale, to industrially relevant manufacturing stages. Both stirred batch and continuous flow reactor techniques will be systematically studied in combination with production-rate-acceleration external energies such as electrical fields, microwaves and ultrasonic radiation. Computational fluid dynamics will be used to design and optimize catalysts based on theoretical analyses and numerical modeling using. Detailed flow field distributions, chemical kinetics, and experimental validation will guide the design and control of the field-assisted growth reactors. Various metal doping will be conducted on the nano-arrays to enable LOT activity and selectivity for catalytic diesel oxidations. These structured nanocatalysts will be tested and validated as low temperature diesel oxidation catalysts (DOC) for hydrocarbon and nitrogen oxide oxidations.This project will provide new insights on the thermodynamic, transport and growth behavior of nanomaterial assemblies at a 3-D monolithic device/system level, as accelerated by external energy field implementation. The resulting structured nanocatalysts will provide a much needed class of LOT DOCs for the automotive industry, and will directly impact the fuel economy, energy and environmental sustainability. Such arrays will also provide a unique device platform applicable in chemical, mechanical, and biotechnology industries. The complementary experimental and modeling study for hydrothermal manufacturing could be applied to other nanomanufacturing cases involving solution or gas phases. This project emphasizes interdisciplinary education and training involving materials science, chemical engineering, chemistry, and mechanical engineering, as well as the strong industrial partnerships with United Technologies Corporation, Umicore, VeruTEK, and ANSYS. A summer workshop on "Advanced Nanomaterials: Manufacturing and Processing" will be hosted every year by the PIs and industrial partners, targeting community college students and high school teachers, who will eventually influence a number of underrepresented minority students, forming a potential workforce for nanomanufacturing industry of the future. A summer lab course will be held for K-12 students in the Kids Are Scientists Too Program. A ?Nano-Array Catalysts? theme website will be created to disseminate information from this project with a separate access set up for the general public. In the third year of the project an international conference will be held on ?Catalytic Nanomaterials Manufacturing? at UCONN.