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Catalysis-in-a-Box: Robotic Screening of Catalytic Materials in the Time of COVID-19

preprint
revised on 04.05.2020 and posted on 05.05.2020 by Gaurav Kumar, Hannah Bossert, Daniel McDonald, Anargyros Chatzidmitriou, M. Alexander Ardagh, Yutong Pang, ChoongSze Lee, Michael Tsapatsis, Omar Abdelrahman, Paul Dauenhauer

The emergence of a viral pandemic has motivated the transition away from traditional, labor-intensive materials testing techniques to new automated approaches without compromising on data quality and at costs viable for academic laboratories. Reported here is the design and implementation of an autonomous micro-flow reactor for catalyst evaluation condensing conventional laboratory-scale analogues within a single gas chromatograph (GC), enabling the control of relevant parameters including reactor temperature and reactant partial pressures directly from the GC. Inquiries into the hydrodynamic behavior, temperature control, and heat/mass transfer were sought to evaluate the efficacy of the micro-flow reactor for kinetic measurements. As a catalyst material screening example, a combination of four Brønsted acid catalyzed probe reactions, namely the dehydration of ethanol, 2-propanol, 1-butanol, and the dehydra-decyclization of 2-methyltetrahydrofuran on a solid acid HZSM-5 (Si/Al 140), were carried out in the temperature range 403-543 K for the measurement of apparent reaction kinetics. Product selectivities, proton-normalized reaction rates, and apparent activation barriers were in agreement with measurements performed on conventional packed bed flow reactors. Furthermore, the developed micro-flow reactor was demonstrated to be about ten-fold cheaper to fabricate than commercial automated laboratory-scale reactor setups and is intended to be used for kinetic investigations in vapor-phase catalytic chemistries, with the key benefits including automation, low cost, and limited experimental equipment instrumentation.

Funding

Catalysis Center for Energy Innovation(CCEI)

Basic Energy Sciences

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History

Email Address of Submitting Author

hauer@umn.edu

Institution

University of Minnesota

Country

United States of America

ORCID For Submitting Author

0000-0001-5810-1953

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Second Submission, Version 2.0

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