Methanol Catalyst For Hydrogenation Of Carbon Dioxide

CO2is the main greenhouse gas. In order to alleviate problems such as the greenhouse effect caused by CO2emissions, the capture and use of CO2become a hot topic. On the other hand, methanol is used widely, it is not only an important organic chemical raw materials but also very promising new clean energy. The methanol industry has now become an important area for the chemical industry. It’s an effective way to synthesize methanol with CO2as raw materials under the process of catalytic hydrogenation. This process is not only to achieve the CO2recycling but also alleviate the greenhouse effect and energy conservation. Therefore, from the perspective of the environment and energy, the research has a very important significance.In this thesis, some suitable catalysts for methanol synthesis in catalytic hydrogenation of CO2were researched. First, industrial methanol synthesis catalysts were used in CO2hydrogenation to methanol to explore the relationship between structure and properties. Then Cu-based catalysts were homemade on this basis, and Cu-ZnO-ZrO2catalyst were filtered out with higher activity and selectivity. Finally, the preparation conditions of the Cu-ZnO-ZrO2catalyst and the reaction conditions were studied to carry out the optimization. The main work and results included the following aspects:1) First of all, this project conducted in-depth evaluation of merchantable industrial methanol synthesis catalysts. The activities of industrial methanol synthesis catalysts were invested in the CO2hydrogenation reaction.Besides, reaction process conditions such as temperature and space velocity were studied to carry out optimal results,which show that part of the industrial methanol synthesis catalyst has high activity; binding characterization findings, we explored the relationship between structures and properties.2) We filtered out the co-catalyst component on the Cu-ZnO based catalysts. AI2O3, ZrO2, TiO2and SiO2were added in the Cu-ZnO based catalysts as co-catalyst component, the evalution results showed that ZrO2element could effectively improve the low temperature catalyst performance. After formula optimization, Cu-ZnO-ZrO2 catalyst was proved to have a high catalytic performance in CO2hydrogenation.3) The influence of key preparation processes on the catalitic properties were studied systematicly. The preparation technology, properties of catalysts and the characterization results were correlated.4) The effects of reduction temperature, reaction temperature, pressure, space velocity and H2/CO2to the catalytic properties were studied. In addition, Cu-ZnO-ZrO2catalyst was tested about its stability at220℃, catalyst stably operated for1000h without deactivation, and this result reached the laboratory requirements.