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US 12,611,654 B2Granted
Highly chlorine- and water-resistant catalyst, preparation method therefor and use thereof
AssigneeZhejiang University
InventorsXiaole Weng, Yunpeng Long, Meiling Chen, Zhongbiao Wu
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Abstract
A preparation method for a highly chlorine- and water-resistant catalyst is provided. A mixture of at least one of SnO2, GeO2, and MoO2 with CeO2 is used as a catalyst support, face-centered cubic ruthenium oxide is used as an active component, and the catalyst with excellent chlorine- and water-resistance is prepared through selective adsorption regulation, which can realize safe and efficient purification of chlorine-containing organic waste gas at temperatures below 250° C.
Claims6
A preparation method for a highly chlorine- and water-resistant catalyst, comprising the following steps:
- (1) mixing MO2 with CeO2 to obtain a MO2CeO2 support, wherein the MO2 is at least one of SnO2, GeO2, and MoO2;
- (2) mixing ruthenium acetylacetonate, a reductant, and a stabilizer to obtain a first mixture, and carrying out a reduction reaction on the first mixture to obtain face-centered cubic (FCC) RuOx;
- (3) mixing the MO2CeO2 support obtained in step (1) with the FCC RuOx obtained in step (2) and water to obtain a second mixture, and carrying out supporting on the second mixture at a predetermined pH to obtain a catalyst precursor;
- and
- (4) calcining the catalyst precursor obtained in step (3) to obtain the highly chlorine- and water-resistant catalyst;
- wherein step (1) and step (2) have no order of priority;
- in step (3), the predetermined pH is determined by an isoelectric point of the MO2CeO2 support such that the FCC RuOx has a stronger interaction with the MO2 rather than the CeO2, and the supporting is carried out at a temperature of 40-60° C. for 1-6 h;
- wherein x in RuOx is a positive value.
5 more elements
Dependencies are inferred from the claim text.