Catalytic combustion technology is one of the latest VOCs treatment processes because of its high purification rate, low combustion temperature (generally lower than 350°C), no open flames, no secondary pollutants such as NOx, and safety, energy saving and environmental protection. In recent years, there has been considerable development in market applications. As a key technology component of catalytic combustion systems, the synthesis technology and application rules of catalysts are particularly important. Since the establishment of the national engineering laboratory for the clean production of alcohol ether esters and chemicals through the approval of the National Development and Reform Commission in 2008, it has focused on the clean production technology of alcohol ether esters. Taking the green catalyst and clean preparation process as the focus of research and development, related work was carried out to provide technical support for the continuous optimization of catalysts and catalytic combustion systems. 1, the catalytic combustion reaction principle 2, what is the low temperature catalyst Low-temperature catalyst performance indicators: light-off temperature ≤ 200 °C, oxidation conversion efficiency ≥ 95%, hole density 200-400cpsi, compressive strength ≥ 8MPa. 3. The role and influence of VOCs catalysts in catalytic combustion systems Generally, the self-combustion temperature of VOCs is relatively high. Through the activation of the catalyst, the activation energy of VOCs combustion can be reduced, thereby reducing the light-off temperature, reducing energy consumption, and saving costs. In addition: In general (without the presence of a catalyst), the combustion temperature will be above 600°C. This combustion will produce nitrogen oxides, which is often referred to as NOx, which is also a pollutant to be strictly controlled. Catalytic combustion is no open flame combustion, generally less than 350 °C, will not generate NOx, so more secure and environmentally friendly. 4. What is the airspeed? What are the factors that affect airspeed? In VOCs catalytic combustion systems, the reaction space velocity is usually referred to as the space velocity (GHSV), reflecting the catalyst's processing capacity: The reaction space velocity is the amount of gas processed per unit volume of catalyst per unit time in m3/(m3 catalyst?h), which can be simplified to h-1. For example, the product is marked with an airspeed of 30000h-1, which means that it can process 30000m3 of exhaust gas per cubic meter of catalyst per hour. The airspeed reflects the VOCs processing capability of the catalyst and is therefore closely related to the performance of the catalyst. 5, the relationship between precious metal load and airspeed. Is the higher the precious metal content, the better? The properties of precious metal catalysts are related to the precious metal content, particle size, and dispersion. Ideally, the precious metals are highly dispersed. In this case, the precious metals are present on the support with very small particles (several nanometers). The precious metals are maximally utilized. At this point, the processing capacity of the catalyst is positively related to the precious metal content. However, when the content of precious metals is high to a certain extent, metal particles tend to aggregate and grow into larger particles. The interface between precious metals and VOCs decreases, and most of the precious metals are contained inside. At this time, increasing the content of precious metals is not conducive to the activity of the catalyst. improve. 6. Effect of gas volume expansion on airspeed after gas combustion In steady state operation, the volumetric expansion of gas has little effect on the airspeed, because in general VOCs content is not high, only the expansion of this part of the gas, the increase in volume flow rate is very small. 7. What are the advantages of nano-catalysts? Nanocatalyst refers to the fact that the active components of the catalyst (such as precious metals) are dispersed on the carrier in the nanometer scale, and the active components of the catalyst are exposed to the gas as much as possible, so that the chances of contact between the two are greatly increased. Such catalysts generally have more performance. superior. 8, the definition of light-off temperature and complete conversion temperature, and the relationship with the concentration of exhaust gas Ternary Catalytic Cleaner,Three Way Cleaning Catalytic Converter Cleaner,Catalytic Converter Cleaning Agent,Catalytic Converter Cleaner Cleaning Ningbo Hangtai Environmental Protection Technology Co., Ltd , https://www.nbhangtaikj.com