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US 12,715,823 B2Granted
Catalyst for exothermal reactions
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
InventorsRonny Tobias Zimmermann, Jens Bremer, Kai Sundmacher
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Abstract
The invention relates to a molded body which comprises a catalytically active region and a porous coating which lies on the catalytically active region, wherein at least 75 wt. % of the catalytically active material lies in the catalytically active region, and the porosity and average pore diameter of the catalytically active region and the porous coating satisfy the following condition: [ΘPB1.5×dPB×(dKB+150 nm)]/[ΘKB1.5×dKB×(dPB+150 nm)]<1.
Claims14
A shaped body which contains a catalytically active material, the shaped body comprising:
- a catalytically active region and a porous coating which is present on the catalytically active region, wherein:
- the entire catalytically active material of the shaped body is present in the catalytically active region on which the porous coating is present, wherein the porous coating is the outermost coating of the shaped body, and wherein the porous coating is catalytically inactive, and
- the porous coating and the catalytically active region satisfy the following condition:
- [ΘPB1.5×dPB×(dKB+150 nm)]/[ΘKB1.5×dKB×(dPB+150 nm)]<1.0
- where:
- ΘPB is the porosity of the porous coating;
- dPB is the average pore diameter, in nm, of the porous coating;
- ΘKB is the porosity of the catalytically active region;
- dKB is the average pore diameter, in nm, of the catalytically active region.
6 more elements
Dependencies are inferred from the claim text.