In:
Reaction Chemistry & Engineering, Royal Society of Chemistry (RSC), Vol. 7, No. 5 ( 2022), p. 1073-1082
Abstract:
To reduce CO 2 emissions, a flexible process operation for chemical methanol synthesis may be required as the supply of renewable energy-based feedstocks fluctuates. Analysis for the determination of the changing conditions of the long-term activity of catalysts is therefore important for efficient industrial production. A commercial Cu/ZnO/Al 2 O 3 catalyst and five other materials (CuBaTiO X , CuCaTiO X , CuCeAlO X , CuSrAlO X and CuSrTiO X ), prepared using solution combustion methods, were tested at two different pressures ( p ), followed by ageing at high temperature ( T ) jumps to show the effects of sensitivity. Surfaces were characterized by N 2 physisorption, scanning electron microscopy, coupled with energy dispersive spectroscopy (SEM-EDS), and crystallographic X-ray diffraction (XRD) with additional structural Rietveld refinement. Stability reduction mechanisms were assessed, a model was developed with the applied relative partial p of reaction product species as input, and, for CuCeAlO X , it was demonstrated that the kinetics of deactivation is related to a unified H 2 O gage p distribution, while excluding the correlations of other four prevalent gases (hydrogen, carbon dioxide, carbon monoxide and methanol). An activity decrease can be predicted. Interestingly, synthesized SrCO 3 -containing mixtures exhibited a lesser loss of initial methanol synthesis activity at 50 bar than at 20 bar during time-on-stream increased T application. In addition, the activity relationship of the catalysts with N 2 and H 2 S poisoning was described. A linear performance differentiation as a function of the amount of H 2 S impurity was observed, presented and mechanistically modelled. Carbon capture and utilisation technologies, power-to-liquid and e-fuels, will often require (realistic) non-steady state dynamics, which we herein simulate catalytically.
Type of Medium:
Online Resource
ISSN:
2058-9883
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
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