Description of methanol combustion exhaust purification catalyst
Methanol, as a low carbon compound, is a highly efficient liquid fuel. As a new energy source, methanol has been widely used in new energy automobiles, mobile power sources and industrial and commercial heating. In use process, due to no sufficient combustion and emission of CO, methane, methanol, dimethyl ether, such as waste gas will cause secondary pollution to environment, especially in a relatively closed space can lead to high local concentration of exhaust gas affect the operator's health, through the use of methanol combustion exhaust gas purifying catalyst, can effectively purify exhaust emissions, and reduce the generation of atmospheric pollutants.
Introduction of methanol combustion exhaust purification catalyst
Cas-kr-mf-eg methanol exhaust combustion catalyst is prepared by using cordierite honeycomb ceramic and metal as carrier, using unique coating material and precious metal as active group. It has the characteristics of high catalytic activity, good thermal stability, long service life, small airflow resistance and high intensity.
Process conditions and technical indexes of catalyst for methanol combustion tail gas purification
The carrier is cordierite of various specifications and composite alumina
01: airspeed ≥1×104h-1
02: ignition temperature at room temperature
03: the best operating temperature is 300℃-500℃
04: exhaust gas purification rate ≥95%
05: life span of more than one year
06: export exhaust gas concentration < 100ppm
07: bulk specific gravity 0.68±0.05g/mL
08: compressive strength ≥14 MPa
09: coating load > 10.0%
10: active load 0.05%--0.2% (or as required by customer)
11: shedding rate < 1%
12: the general appearance is light yellowish-brown (reduced to gray)
13: the Package is moisture-proof
Principle of catalyst treatment for methanol combustion tail gas purification
Methanol combustion tail gas purification catalyst generally adopts the low-temperature catalytic combustion method, low-temperature catalytic combustion method is to use the catalytic role of the catalyst to conduct low-temperature, efficient, energy-saving and environment-friendly treatment of organic matter, so as to achieve the purpose of standard emission. Catalytic combustion reaction is a typical gas-solid phase catalytic reaction. Its essence is the catalytic oxidation reaction of organic matter adsorbed on the catalyst surface and oxygen from the air at a certain temperature to completely oxidize harmless CO2 and H2O and release reaction heat. With the help of catalyst, the ignition temperature of organic matter can be greatly reduced, flame free combustion can be carried out, and the preheating energy consumption and NOx generation can be reduced.
Low temperature catalytic combustion process characteristics
(1) low ignition temperature, after reaching a certain concentration without external energy supply and self-sustaining operation, saving energy;
(2) low combustion temperature, no flame combustion, no NOx compound production;
(3) burning rate, burning thoroughly, no benzo pyrene, dioxin and other toxic carcinogenic substances;
(4) combustion products for harmless CO2 and H2O, no solid waste, sewage, waste solvent and waste gas and other secondary pollutants;
(5) the treatment efficiency is very high, the rate of complete compliance is much higher than other treatment;
6. Process equipment is simple, mature technology, equipment and maintenance cost is low, unit waste gas treatment cost is low;
7 reasonable design of equipment, safe and reliable operation, stable performance, PLC automatic operation, no need for special maintenance;
Applicable range is wide, suitable for high, medium and low concentration, different industries of various complex, odor waste gas treatment;
9 (9) compact structure, small footprint.