Readily Constructed Glass Piston Pump for Gas Recirculation.

Autor: Nielander AC; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., Blair SJ; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., McEnaney JM; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., Schwalbe JA; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., Adams T; Adams & Chittenden Scientific Glass, 2741 Eighth Street, Berkeley, California 94710, United States., Taheri S; Stanford Prototyping Facility, Stanford University, 350 Jane Stanford Way, Stanford, California 94305, United States., Wang L; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., Yang S; Department of Physics, Technical University of Denmark, Building 311, Fysikvej, DK-2800 Kgs Lyngby, Denmark., Cargnello M; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States., Jaramillo TF; Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2020 Jul 02; Vol. 5 (27), pp. 16455-16459. Date of Electronic Publication: 2020 Jul 02 (Print Publication: 2020).
DOI: 10.1021/acsomega.0c00742
Abstrakt: The recirculation of gases in a sealed reactor system is a broadly useful method in catalytic and electrocatalytic studies. It is especially relevant when a reactant gas reacts slowly with respect to residence time in a catalytic reaction zone and when mass transport control through the reaction zone is necessary. This need is well illustrated in the field of electrocatalytic N 2 reduction, where the need for recirculation of 15 N 2 has recently become more apparent. Herein, we describe the design, fabrication, use, and specifications of a lubricant-free, readily constructed recirculating pump fabricated entirely from glass and inert polymer (poly(ether ether ketone) (PEEK), poly(tetrafluoroethylene) (PTFE)) components. Using these glass and polymer components ensures chemical compatibility between the piston pump and a wide range of chemical environments, including strongly acidic and organic electrolytes often employed in studies of electrocatalytic N 2 reduction. The lubricant-free nature of the pump and the presence of components made exclusively of glass and PEEK/PTFE mitigate contamination concerns associated with recirculating gases saturated with corrosive or reactive vapors for extended periods. The gas recirculating glass pump achieved a flow rate of >500 mL min -1 N 2 against atmospheric pressure at 15 W peak power input and >100 mL min -1 N 2 against a differential pressure of +6 in. H 2 O (∼15 mbar) at 10 W peak power input.
Competing Interests: The authors declare no competing financial interest.
(Copyright © 2020 American Chemical Society.)
Databáze: MEDLINE
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