The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst

Show full item record



Permalink

http://hdl.handle.net/10138/330235

Citation

Heikkinen, N.; Keskiväli, L.; Eskelinen, P.; Reinikainen, M.; Putkonen, M. The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst. Catalysts 2021, 11, 672.

Title: The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst
Author: Heikkinen, Niko; Keskiväli, Laura; Eskelinen, Patrik; Reinikainen, Matti; Putkonen, Matti
Publisher: Multidisciplinary Digital Publishing Institute
Date: 2021-05-24
URI: http://hdl.handle.net/10138/330235
Abstract: Atomic layer deposition (ALD) was used to prepare a thin alumina layer on Fischer–Tropsch catalysts. Co-Pt-Si/γ-Al<sub>2</sub>O<sub>3</sub> catalyst was overcoated with 15–40 cycles of Al<sub>2</sub>O<sub>3</sub> deposited from trimethylaluminum (TMA) and water vapor, followed by thermal annealing. The resulting tailored Fischer–Tropsch catalyst with 35 cycle ALD overcoating had increased activity compared to unmodified catalyst. The increase in activity was achieved without significant loss of selectivity towards heavier hydrocarbons. Altered catalyst properties were assumed to result from cobalt particle stabilization by ALD alumina overcoating and nanoscale porosity of the overcoating. In addition to optimal thickness of the overcoat, thermal annealing was an essential part of preparing ALD overcoated catalyst.


Files in this item

Total number of downloads: Loading...

Files Size Format View
catalysts-11-00672.pdf 1.081Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record