Design and characterization of a microreactor for monodisperse catalytic droplet generation at both elevated temperatures and pressures

J. C. Vollenbroek, Johan G. Bomer, A. Van Den Berg, M. Odijk, A. E. Nieuwelink, Bert M. Weckhuysen, R. G. Geitenbeek, R. M. Tiggelaar

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    96 Downloads (Pure)

    Abstract

    We report the fabrication and characterization of a microfluidic droplet microreactor with potential use for single catalyst particle diagnostics. The aim is to capture Fluid Catalytic Cracking (FCC) particles in droplets and perform a probe reaction that results in a fluorescent output signal. The intensity of such a signal can be used as a measure of the catalytic activity of the particle. The microreactor features a droplet generator, platinum (Pt) microheaters, and Pt micro temperature sensors, and is able to operate at pressures up to at least 5 bar. Fluidic channels are etched in a silicon substrate, and platinum heater and sensor structures embedded in the glass cover. We have mapped the temperature inside the microchannels using nanoparticles that show temperature-dependent luminescence. At various spots on the chip, the temperature deviates by 0.86 degrees Celsius close to the Pt sensor and 5.5 degrees Celsius farther away from it. Experiments with making oil-in-water droplets at various temperatures and pressures result in stable droplets up to 100 degrees Celsius at atmospheric pressure. At this temperature, small gas bubbles are formed in the water phase, and then collected by the oil droplets. At a pressure of 5 bar, the droplets are stable up to at least 120 degrees Celsius. E-cat FCC particles were captured in water droplets at a rate of 150 droplets per second.

    Original languageEnglish
    Title of host publication2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
    PublisherIEEE
    Pages746-751
    Number of pages6
    ISBN (Electronic)9781509030590
    ISBN (Print)978-1-5090-3060-6
    DOIs
    Publication statusPublished - 25 Aug 2017
    Event12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 - UCLA Meyer & Renee Luskin Conference Center, Los Angeles, United States
    Duration: 9 Apr 201712 Apr 2017
    Conference number: 12

    Conference

    Conference12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
    Abbreviated titleNEMS
    CountryUnited States
    CityLos Angeles
    Period9/04/1712/04/17

    Keywords

    • droplet microfluidics
    • E-cat FCC
    • elevated temperature and pressure
    • microreactor
    • Pt microheater

    Fingerprint Dive into the research topics of 'Design and characterization of a microreactor for monodisperse catalytic droplet generation at both elevated temperatures and pressures'. Together they form a unique fingerprint.

  • Cite this

    Vollenbroek, J. C., Bomer, J. G., Van Den Berg, A., Odijk, M., Nieuwelink, A. E., Weckhuysen, B. M., ... Tiggelaar, R. M. (2017). Design and characterization of a microreactor for monodisperse catalytic droplet generation at both elevated temperatures and pressures. In 2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 (pp. 746-751). [8017127] IEEE. https://doi.org/10.1109/NEMS.2017.8017127