Cerium manganese catalyst, preparation method therefor and use thereof
AssigneeResearch Center for Eco-Environmental Sciences, Chinese Academy of Sciences
InventorsHong He, Jinzhu Ma, Xiaotong Li, Changbin Zhang
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Abstract
A cerium manganese catalyst for ozone decomposition, which is mainly a composite oxide of Mn2O3 and CeO2 with the chemical constitution of CeMnaOx, a being a natural number selected from 6 to 15. A method for preparing a catalyst comprises: mixing a solution containing a cerium source and a manganese source with excessive urea, reacting to obtain a precipitate, washing the precipitate to neutral, drying, and roasting to obtain the cerium manganese catalyst.
Claims16
A method for preparing a cerium-manganese catalyst for ozone decomposition at a high space velocity within a wide temperature range:
- mixing a solution consisting of a cerium source and a manganese source with excess urea, carrying out a reaction to obtain a precipitate, washing the precipitate to a neutral pH, drying, and calcining to obtain the cerium-manganese catalyst,
- wherein the cerium-manganese catalyst has a following chemical composition:
- CeMnaOx, wherein a in CeMnaOx is a natural number selected from 9 to 15, and the cerium-manganese catalyst is mainly a composite oxide of Mn2O3 and CeO2,
- wherein the cerium-manganese catalyst is in a form of particles,
- wherein when the cerium-manganese catalyst is used for ozone decomposition, a temperature range is −10° C. to 100° C., a space velocity is up to 2,000,000 h−1, a humidity is not more than 90%, a decomposition efficiency is above 80%, and the cerium-manganese catalyst gives a decomposition rate of 99% of ozone of 4 ppm after 70 h of use.
Dependencies are inferred from the claim text.