| 摘要 |
To improve stability of catalytic performance, an aromatizing catalyst for converting lower hydrocarbons into aromatic compounds is regenerated. A regeneration process of the aromatizing catalyst according to the present invention includes the steps of: (a) reacting the aromatizing catalyst with a hydrogen gas in an atmosphere containing the hydrogen gas after using the aromatizing catalyst in an aromatizing reaction for converting lower hydrocarbons into aromatic compounds; (b) decreasing a temperature of the atmosphere containing the hydrogen gas reacted with the aromatizing catalyst, by supplying one of an inert gas and a reducing gas to the atmosphere; (c) reacting the aromatizing catalyst reacted with this inert gas, with an oxidizing gas; and (d) reacting the aromatizing catalyst reacted with the oxidizing gas, with a reducing gas. The reaction step between the aromatizing catalyst and hydrogen gas is conducted in a temperature region that is the same as the temperature of the aromatizing reaction. In the temperature decreasing step, an inert gas is supplied such that the temperature of the aromatizing catalyst becomes 400°C-550°C. In the step of reacting the aromatizing catalyst with an oxidizing gas, the temperature of an atmosphere, in which the aromatizing catalyst is reacted with the oxidizing gas, is set at 450°C-500°C. |
