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Storage Units are important tools in most industrial processes. Research dust explosions are often dangerous because there is a risk of fire and also the results differ widely according to the product or the storage condition. Thus, a good suggestion is to use computational fluid dynamics (CFD), which can simulate a dust explosion very accurately and can generalize the phenomenon of the explosion. Mainly for agricultural products like corn that are very highly explosive. One should take into account that agricultural products are the most responsible for dust explosions. It is important to point out that there are inert gases which enhance an explosion such as methane gas generated by methanogenic bacteria in storage units. In this sense the aim of analyzing the mitigation of dust explosion maize which is influenced by methane gas, using such techniques CFD. To this was used ANSYS CFX 11.0 with an unstructured mesh model of a silo of about 1 m3. Being used to generate the blast of corn powder, values as a source of ignition and temperature increase in the atmosphere of the storage unit. After various tests it was found that the introduction of the methane contained in the environment causes a decrease minimum ignition temperature.