Reaction device for fluidized bed catalyst performance evaluation

[0016] [Example 1]

[0017] In such figure 1 On the reaction device shown, the tops of the regenerator, the first reactor, and the second reactor are all provided with gas outlets, and a catalyst filter is set before the gas outlet. The catalyst flow control valve is a plug valve, and the catalyst flow control valve outlet is connected to the second reactor. The dense phase section of a reactor is connected, the riser outlet is connected with the dilute phase section of the regenerator, and a catalyst feeding pipeline is arranged on the top of the regenerator. The operating pressure of the device is normal pressure (gauge pressure), the catalyst adopts SAPO-34, the first raw material adopts a mixed hydrocarbon with carbon four or more, and the content of carbon four olefin is 88% by weight, and the second raw material adopts methanol with a purity of 99.5%. The regeneration medium is air, the regeneration temperature is 650℃, the reaction temperature of the first reactor is 550℃, and the carbon four mass space velocity is 1.8 hours. -1 , The mass fraction of carbon deposit on the catalyst coming out from the bottom of the first reactor is 1.2%, the reaction temperature of the second reactor is 470℃, and the methanol mass space velocity is 4.2 hours -1 The mass fraction of the carbon deposit on the catalyst coming out from the bottom of the second reactor is 4.8%, and the lifting medium of the riser is nitrogen. The outlet product of the second reactor and the outlet product of the first reactor are combined to enter the separation process. The separated gas phase product is analyzed by online gas chromatography. The yield of ethylene and propylene carbon-based in the gas phase product is 86.74% (weight).

[0018] [Example 2]

[0019] According to the conditions and steps of Example 1, except that the first raw material uses methanol with a purity of 99.5%, the second raw material uses steam, the second reactor is used as a stripper, and the reaction temperature of the first reactor is 470°C. Airspeed is 4.2 hours -1 The mass fraction of carbon deposit on the catalyst coming out from the bottom of the first reactor is 4.3%, which enters the riser after being stripped, and the carbon-based yield of ethylene and propylene in the gas phase product is 81.28% by weight.

[0020] Obviously, with the device of the present invention, continuous reaction-regeneration performance evaluation of fluidized bed catalysts can be performed, the device type is novel, the use is flexibly adjusted, and it has greater technical advantages and can be used in the performance evaluation of fluidized bed catalysts.