An ultrahigh vacuum-compatible reaction cell for model catalysis under atmospheric pressure flow conditions

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

Externe Organisationseinheiten

  • Technische Universität Wien
  • Boreskov Institute of Catalysis SB RAS

Abstract

Atmospheric pressure reactions on model catalysts are typically performed in so-called high-pressure cells, with product analysis performed by gas chromatography (GC) or mass spectrometry (MS). However, in most cases, these cells have a large volume (liters) so that the reactions on catalysts with only cm2 surface area can be carried out only in the (recirculated) batch mode to accumulate sufficient product amounts. Herein, we describe a novel small-volume (milliliters) catalytic reactor that enables kinetic studies under atmospheric pressure flow conditions. The cell is located inside an ultrahigh vacuum chamber that is deliberately limited to basic functions. Model catalyst samples are mounted inside the reactor cell, which is locked to an oven for external heating and closed by using an extendable/retractable gas dosing tube. Reactant and product analyses are performed by both micro-GC and MS. The functionality of the new design is demonstrated by catalytic ethylene (C2H4) hydrogenation on polycrystalline Pt and Pd foils.

Details

OriginalspracheEnglisch
Aufsatznummer125101
Seitenumfang10
FachzeitschriftReview of scientific instruments
Jahrgang91.2020
Ausgabenummer12
DOIs
StatusVeröffentlicht - 1 Dez. 2020
Extern publiziertJa