Carbon monoxide (CO) is a common toxic gas, which has great harm to human body and the environment. In many industrial production and daily life, the generation and emission of CO is inevitable. Therefore, it is important to develop effective and efficient CO removal technologies. Noble metal catalysts are a class of catalysts with high catalytic activity, selectivity and stability, which are widely used in CO removal and other fields.
Main types and properties of noble metal catalysts
noble metal catalysts mainly include platinum (Pt), palladium (Pd), Iridium (Ir), rhodium (Rh), gold (Au) and other metals. These metals have unique electronic structures and atomic arrangements that allow them to exhibit excellent properties in catalysts. In CO removal, the noble metal catalyst can cause CO to react with oxygen (O2) to produce harmless carbon dioxide (CO2). The noble metal catalyst has high catalytic activity, high selectivity and good anti-poisoning performance, and can effectively remove CO at low temperature.
Preparation method of noble metal catalyst
The preparation methods of noble metal catalyst mainly include impregnation method, coprecipitation method, sol-gel method, etc. Each method has its own advantages and disadvantages in terms of catalyst performance, cost and operation. In order to improve the performance of noble metal catalysts and reduce the cost, researchers have also used loading, nano and alloying technologies.
Research progress on the application of noble metal catalysts in CO removal
Significant research progress has been made in the application of noble metal catalysts in CO removal, such as:
4.1 Automobile exhaust purification: noble metal catalysts are widely used in automobile exhaust purifiers, which can effectively remove harmful gases such as CO, hydrocarbon compounds (HC) and nitrogen oxides (NOx). In addition, the researchers are also exploring the combination of noble metal catalysts with other functional materials to improve the performance and stability of automotive exhaust purifiers.
4.2 Indoor air purification: The application of noble metal catalysts in indoor air purifiers has attracted more and more attention, which can effectively remove CO, formaldehyde, benzene and other indoor harmful gases. Researchers are also developing new noble metal catalysts to improve the performance, reduce the cost and reduce the size of indoor air purifiers.
4.3 Industrial flue gas treatment: noble metal catalysts have a wide range of application prospects in the field of industrial flue gas treatment, such as chemical, petroleum, steel and other industries. Researchers are developing more efficient and stable noble metal catalysts to meet the needs of different industrial flue gas treatments.
4.4 Fuel cells: noble metal catalysts play an important role in fuel cells, catalyzing the production of water and electricity from hydrogen and oxygen. Researchers are exploring the design and optimization of new noble metal catalysts to improve the performance and durability of fuel cells.
Summary
noble metal catalysts have significant advantages in carbon monoxide removal, and have made important research progress in the fields of automobile exhaust gas purification, indoor air purification, industrial flue gas treatment and fuel cells. However, the high cost and scarcity of noble metal catalysts remain major challenges for their development. Future research needs to focus on the synthesis method optimization, performance improvement, cost reduction and sustainability of noble metal catalysts to promote the wider application of noble metal catalysts in the field of carbon monoxide removal.
Post time: Sep-08-2023