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Filtering by: Creator Kelley, Brian F. Remove constraint Creator: Kelley, Brian F. Subject Microreactors Remove constraint Subject: Microreactors

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  • Fluidic and thermal modeling for the high production rate synthesis of high quality nanoparticles

    Creator:
    Peterson, Daniel Alan
    Abstract:
    Advances of colloidal nanomaterials for societal benefit have been hampered by the high cost and low quality of nanoparticles (NPs). The production of high quality nanoparticles within colloidal suspension has two related concerns; (1) current high production rates methods of synthesizing nanoparticles result in a larger range of particle size,...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Brian K. Paul Advances of colloidal nanomaterials for societal benefit have been

  • Micromixer assisted continuous flow synthesis of nanoparticles of binary compounds and their application

    Creator:
    Palanisamy, Barath
    Abstract:
    In this work, continuous synthesis routes for binary nanoparticles using advantages of microchannel mixing (low diffusion distances and higher mass transfer) and fast heating rates provided by ultrasound induced heating are investigated. In addition, the application of silica nanoparticles in anti-reflective coatings on glass and understanding the structure­ property-performance correlation...
    Resource Type:
    Dissertation
    Full Text:
    of Nanoparticles of Binary Compounds and their Application Abstract approved: Brian K Paul In

  • Sources of flow maldistribution in microreactor-assisted synthesis of ceria nanoparticles

    Creator:
    Tseng, Chih-Heng
    Abstract:
    Recent efforts show that microchannel technologies have much to offer the field of nanomanufacturing: the structuring of matter on the order of one billionth of a meter. During the synthesis of nanomaterials, microchannel reactors take advantage of large surface-to-volume ratios to accelerate heat and mass transport. This accelerated transport allows...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Brian K. Paul Recent efforts show that microchannel technologies have much to offer the

  • Force Prediction in the Compression Sealing of an Ultra-thin Elastoviscoplastic Membrane

    Creator:
    McNeff, Patrick Scot
    Abstract:
    The objective of this paper is to demonstrate a method for mechanically characterizing a 25 μm thick elastoviscoplastic hemodialysis membrane and for quantifying the force required to use that membrane in compression sealing. First, methods are developed for mechanically characterizing the thin elastoviscoplastic membrane. Then, a finite element model is...
    Resource Type:
    Masters Thesis
    Full Text:
    Brian K. Paul The objective of this paper is to demonstrate a method for mechanically

  • Half Array Architecture for Advancing Microchannel Heat Recuperation to Market

    Creator:
    Brannon, Samuel T.
    Abstract:
    High temperature microchannel heat recuperators (HTμRs) offer an efficient means of improving reactor process thermal efficiency by offering smaller form factors due to increased heat transfer surface area density and volumetric heat transfer rate over traditional heat exchanger designs. To date, HTμRs face cost and reliability challenges. In this work,...
    Resource Type:
    Dissertation
    Full Text:
    approved: Brian K. Paul High temperature microchannel heat recuperators (HTµRs) offer an efficient means

  • Fabrication of precipitation-hardened aluminum microchannel cooling plates for adsorption-based hydrogen storage systems

    Creator:
    Pawar, Supriya V.
    Abstract:
    The need for clean and renewable fuel such as hydrogen is driven by a growing worldwide population and increasing air pollution from fossil fuels. One of the major barriers for the use of hydrogen in automotive industry is the storage of hydrogen. Physisorption is the most promising storage technique due...
    Resource Type:
    Masters Thesis
    Full Text:
    Storage Systems Abstract Approved: _______________________________________________________ Brian K

  • A microchannel-based thermal management system for hydrogen storage adsorbent beds

    Creator:
    Steigleder, Leif J.
    Abstract:
    Hydrogen has been shown to be a promising replacement for fossil fuels for use in light duty vehicles because it is a clean, renewable and plentiful resource with a high gravimetric energy density. However, in order to obtain an acceptable volumetric energy density, densification of the hydrogen is required. Adsorptive...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract Approved: Brian K. Paul Hydrogen has been shown to be a promising replacement for

  • Intermetallic microlamination for high-temperature microreactors

    Creator:
    Dewey, Tyler
    Abstract:
    Chemical microreactors offer opportunities for portable power generation, on-site waste remediation and point-of-use chemical synthesis. Much of the existing development of microreactor devices involves silicon-based microfabrication techniques. It is recognized that new refractory materials are important to realizing high-temperature microreactors. Requirements of these materials include high-temperature resistance, chemical inertness and...
    Resource Type:
    Masters Thesis
    Full Text:
    lamination for High-Temperature Microreactors Abstract approved: Redacted for privacy Brian K. Paul

  • Experimental investigation of supercritical heat transfer of carbon dioxide in parallel square microchannels with a single-wall constant heat flux boundary condition

    Creator:
    Zada, Kyle R.
    Abstract:
    In the vicinity of the pseudocritical point, supercritical carbon dioxide (sCO₂) undergoes a steep change in properties from “liquid-like” to “gas-like” as it is heated at a constant pressure. At the same time, there is a large spike in specific heat which can yield high heat transfer coefficients and heat...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Brian M. Fronk In

  • Synthesis and evaluation of PEO-coated materials for microchannel-based hemodialysis

    Creator:
    Heintz, Keely
    Abstract:
    The marked increase in surface-to-volume ratio associated with microscale devices for hemodialysis leads to problems with hemocompatibility and blood flow distribution that are more challenging to manage than those encountered at the conventional scale. In this work, stable surface modifications with pendant polyethylene oxide (PEO) chains were produced on polycarbonate...
    Resource Type:
    Masters Thesis
    Full Text:
    . Thanks to fellow NIH PIs Drs. Goran Jovanovic, Brian Paul, and Kendra Sharp, and to their students