DEHYDROAROMATIZATION OF METHANE OVER ZEOLITE CATALYSTS

The dehydroaromatization of methane over zeolite catalysts is a process in which methane is converted into aromatic compounds.The main objective of this process is to transform methane into high-value aromatic products, especially benzene, toluene, and xylene. Zeolite catalysts are effective materials that accelerate this reaction, distinguished by their unique structure and large surface areas. In the presence of zeolite catalysts, methane undergoes dehydrogenation, and aromaticity develops in its structure. Zeolites (especially ZSM-5) are catalysts that possess high selectivity and thermal stability.They activate methane molecules, facilitating the dehydrogenation process. The porous structure of zeolites aids in the efficient transport of reactants and products during the reaction. In this process, methane molecules are first dehydrogenated and then converted into aromatic compounds, resulting in the production of high-value products containing carbon and hydrogen atoms. The dehydroaromatization reaction occurs under high temperatures (450-700°C) and specific pressure conditions.The activity and selectivity of the catalyst are optimized by factors such as temperature and pressure.Zeolite catalysts have high selectivity and catalytic activity, which allows for the production of highly demanded aromatic compounds like benzene, toluene, and xylene by increasing the efficiency of the process.This process is considered an ideal method for converting simple and widely available hydrocarbons, such as methane, into high-value chemical products. One of the main challenges for the long-term application of this process is the loss of activity of zeolite catalysts over time, especially due to carbon accumulation on the catalyst's active surface, leading to deactivation. To make the process economically viable, energy and resources must be used efficiently, and the possibility of catalyst reuse must be ensured.