CE6675 Cerium-Zirconium-Lanthanum-Praseodymium Catalysts 40CeO2-50Zr(Hf)O2-5La2O3-5Pr6O11

Cerium-Zirconium-Lanthanum-Praseodymium-Catalyst Description

Cer-Zirconium-Lanthanum-Praseodymium catalysts (40CeO₂-50Zr(Hf)O₂-5La₂O₃-5Pr₆O₁₁) are advanced mixed oxide catalysts with a highly optimised composition for various catalytic applications, particularly in the emissions control of vehicles. These catalysts combine the beneficial properties of Cerium, Zirconium, Lanthanum, and Praseodymium, each contributing unique features to enhance overall performance.

Cerium oxide (CeO₂) plays a critical role due to its high oxygen storage capacity (OSC) and redox activity, allowing for the efficient storage and release of oxygen, which facilitates catalytic reactions, especially in oxidation processes. Zirconium oxide (ZrO₂), often stabilised with Hafnium (Hf) in these formulations, increases thermal stability and resistance to sintering, ensuring that the catalyst maintains its active surface under high-temperature conditions. Lanthanum oxide (La₂O₃) provides enhanced stability and increases the catalytic activity of the oxide phase by promoting the formation of a stable solid solution with Cerium. Praseodymium oxide (Pr₆O₁₁), a rare earth element, improves the redox properties of the catalyst and increases resistance to sulphur poisoning, a common issue in automotive exhaust systems.

This unique combination of elements leads to a catalyst that features exceptional durability, high thermal stability, improved oxygen storage capacity, and outstanding activity in oxidation and reduction reactions. Due to these properties, Cer-Zirconium-Lanthanum-Praseodymium catalysts are ideal for use in automotive catalytic converters, effectively reducing harmful emissions such as CO, NOx, and hydrocarbons. They are also employed in industrial processes that require efficient oxidation, such as in the production of specialty chemicals.

Cerium-Zirconium-Lanthanum-Praseodymium Catalyst Applications

1. Automotive Catalysts: These catalysts are primarily used in the exhaust purification systems of vehicles. They help reduce harmful emissions, such as carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons (HC) from the exhaust of internal combustion engines, improving air quality and complying with environmental regulations.

2. Industrial Catalysis: They are used in various industrial catalytic processes that require oxidation or reduction reactions. This includes reactions in chemical production, particularly during the manufacturing of specialty chemicals and in petrochemical refining.

3. Hydrogenation and Dehydrogenation Reactions: The catalysts are employed in hydrogenation processes to convert unsaturated compounds into saturated ones, and in dehydrogenation processes to remove hydrogen from organic compounds, thereby increasing efficiency in the chemical industry.

4. Water Gas Shift Reaction: These catalysts are utilised in water gas shift reactions for hydrogen production, which is critical in fuel cell technology and hydrogen-based energy systems.

5. Fuel Cells: They are used in certain types of fuel cells, particularly to enhance oxidation reactions during energy generation due to their excellent redox properties and oxygen storage capability.

6. Pollution Control in Industrial Facilities: In addition to use in vehicles, these catalysts can also be implemented in industrial facilities to reduce harmful emissions, particularly in processes such as power generation or manufacturing where high temperatures prevail.

7. CO Oxidation and NOx Reduction in Petrol Engines: They are used for the efficient oxidation of CO and the reduction of NOx emissions from petrol engines, contributing to cleaner exhaust systems.

Cerium-Zirconium-Lanthanum-Praseodymium Catalyst Packaging

Our products are packaged in custom cartons of various sizes, tailored to the dimensions of the material. Smaller items are securely packaged in PP cartons, while larger items are placed in custom wooden crates. We ensure strict adherence to customised packaging and the use of appropriate cushioning materials to provide optimal protection during transport.

Packaging: Carton, wooden crate, or customised.

Please refer to the packaging details for your information.

Manufacturing Process

1)Testing Procedures

(1)Chemical composition analysis - Verified with techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)Mechanical properties testing - Includes strength, yield, and elongation tests to assess material performance.

(3)Dimensional testing - Measures thickness, width, and length to ensure compliance with specified tolerances.

(4)Surface quality inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic inspection.

(5)Hardness testing - Determines material hardness to confirm uniformity and mechanical reliability.

For detailed information, please refer to the SAM Testing Procedures.

Frequently Asked Questions about Cerium-Zirconium-Lanthanum-Praseodymium Catalyst

Q1. What makes these catalysts so special?

Due to their high oxygen storage capacity (OSC) and their ability to undergo redox reactions, they are suitable for oxidation and reduction processes. The combination of Cerium for oxygen storage, Zirconium for stability, and Lanthanum and Praseodymium for enhanced redox properties provides excellent performance.

Q2. What are the main applications of these catalysts?

They are primarily used in automotive catalysts to reduce emissions such as CO, NOx, and hydrocarbons. They are also applied in industry during hydrogenation, dehydrogenation, and other oxidation-reduction processes.

Q3. Why are these catalysts important for use in vehicles?

These catalysts are crucial for reducing pollutant emissions from internal combustion engines and help ensure that vehicles meet strict environmental standards. They efficiently convert toxic gases such as carbon monoxide and nitrogen oxides into less harmful substances.

Performance Comparison Table with Competing Products

Ce-Zr-La-Pr Catalyst (40CeO₂-50Zr(Hf)O₂-5La₂O₃-5Pr₆O₁₁) compared to competing catalysts

Related Information

1.Common Manufacturing Methods

Cer-Zirconium-Lanthanum-Praseodymium catalysts (40CeO₂-50Zr(Hf)O₂-5La₂O₃-5Pr₆O₁₁) are typically produced by co-precipitation followed by calcination. In a standard procedure, aqueous solutions containing the nitrates or chlorides of Cerium, Zirconium (or Hafnium), Lanthanum, and Praseodymium are mixed in stoichiometric ratios. A precipitating agent, such as ammonium hydroxide or oxalic acid, is added slowly while stirring to ensure simultaneous precipitation of the mixed hydroxides or oxalates. The resulting precipitate is aged to allow complete reaction and improved crystallinity, then filtered and thoroughly washed to remove residual ions and dried at moderate temperatures (e.g. 100-120 °C). The dried precursor is then calcined at high temperatures, typically between 500 and 800 °C, to form the final mixed oxide catalyst. The calcination aids in the formation of a homogeneous solid solution with improved surface area, redox properties, and thermal stability. The resulting material is a fine powder with excellent oxygen storage capacity and resistance to sintering, making it suitable for catalytic applications in both automotive and industrial sectors.