低压是有利于热催化分解氨的英文reaction diffusion
    The English translation for "低压是有利于热催化分解氨" is "Low pressure is beneficial for the thermal catalytic decomposition of ammonia."
    Now, let me provide a comprehensive and detailed answer to your question.
    Low pressure plays a crucial role in the thermal catalytic decomposition of ammonia. This process involves breaking down ammonia (NH3) into its constituent elements, nitrogen (N2) and hydrogen (H2), using a catalyst and heat. Lowering the pressure can have several advantages in this reaction.
    Firstly, reducing the pressure can promote the dissociation of ammonia molecules. According to Le Chatelier's principle, when the pressure is decreased, the equilibrium of a reaction tends to shift in the direction that produces fewer moles of gas. In the case of ammonia decomposition, the forward reaction results in a decrease in the total number of gas molecules since two moles of ammonia produce one mole each of nitrogen and hydroge
n. Therefore, by lowering the pressure, the equilibrium is shifted towards the product side, enhancing the decomposition of ammonia.
    Secondly, low pressure can help prevent the reverse reaction. At higher pressures, the reverse reaction, which involves the recombination of nitrogen and hydrogen to form ammonia, becomes more favorable. By operating at low pressure, the reverse reaction can be suppressed, ensuring a higher yield of nitrogen and hydrogen.
    Furthermore, low pressure can enhance the diffusion of reactant molecules to the catalyst surface. In catalytic reactions, the reactant molecules need to come into contact with the catalyst for the reaction to occur. By decreasing the pressure, the mean free path of the gas molecules increases, allowing them to move more freely and efficiently reach the catalyst surface. This facilitates the adsorption of ammonia molecules onto the catalyst, promoting the decomposition process.
    Additionally, low pressure can help in the removal of reaction products. As the ammonia decomposes into nitrogen and hydrogen, the products need to be removed from the reactio
n environment to prevent their recombination. Operating at low pressure can facilitate the removal of these gases, maintaining a favorable environment for the decomposition reaction to proceed.
    In summary, low pressure is beneficial for the thermal catalytic decomposition of ammonia due to several reasons. It promotes the dissociation of ammonia molecules, suppresses the reverse reaction, enhances reactant diffusion to the catalyst surface, and facilitates the removal of reaction products. These factors collectively contribute to improving the efficiency and yield of the ammonia decomposition process.

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