TY - JOUR

T1 - An ultrahigh vacuum-compatible reaction cell for model catalysis under atmospheric pressure flow conditions

AU - Haunold, Thomas

AU - Rameshan, Christoph

AU - Bukhtiyarov, Andrey V.

AU - Rupprechter, Günther

N1 - Publisher Copyright: © 2020 Author(s).

PY - 2020/12/1

Y1 - 2020/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85097345764&partnerID=8YFLogxK

U2 - 10.1063/5.0026171

DO - 10.1063/5.0026171

M3 - Article

C2 - 33379966

AN - SCOPUS:85097345764

VL - 91.2020

JO - Review of scientific instruments

JF - Review of scientific instruments

SN - 0034-6748

IS - 12

M1 - 125101

ER -