Method for producing low-carbon olefin from Fischer-Tropsch synthetic oil
A technology of Fischer-Tropsch synthetic oil and low-carbon olefins, applied in the field of production of low-carbon olefins, can solve the problems of poor low-temperature fluidity and high freezing point, and achieve the effect of reducing the content
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Embodiment 1
[0036] This example is used to illustrate the method for producing light olefins from Fischer-Tropsch synthetic oil provided by the present invention.
[0037] A medium-sized device with continuous reaction-regeneration operation is used for experiments. The reactor in the first reaction zone is a fixed-bed reactor, and the reactant flow after passing through the first reaction zone enters the reactor in the second reaction zone. The inner diameter of the fixed-bed reactor is It is 30 millimeters, and height is 6 meters; The reactor of the second reaction zone is a fluidized bed reactor, and the internal diameter of fluidized bed reactor is 160 millimeters, and height is 0.6 meters.
[0038] Fischer-Tropsch synthetic distillate A is sprayed into a fixed-bed reactor after being preheated to 300°C. The fixed-bed reactor has a volume of 4.2mL and is filled with 2.8mL of amorphous alumina heat carrier. The regenerated catalyst with a temperature of about 700°C enters the bottom of...
Embodiment 2
[0046] This example is used to illustrate the method for producing light olefins from Fischer-Tropsch synthetic oil provided by the present invention.
[0047] The reaction apparatus that adopts is with embodiment 1. The main experimental steps used are the same as those in Example 1, except that the Fischer-Tropsch synthetic distillate A in Example 1 is replaced by Fischer-Tropsch synthetic distillate B with a higher oxygenate content. The main operating conditions and results are listed in Table 3.
Embodiment 3
[0049] This example is used to illustrate the method for producing light olefins from Fischer-Tropsch synthetic oil provided by the present invention.
[0050] The reaction apparatus that adopts is with embodiment 1. The main experimental steps used are the same as those in Example 1, except that no amorphous alumina heat carrier is filled in the fixed-bed reactor.
[0051] table 3
[0052] project
[0053] second reaction zone
[0054] As can be seen from the data in Table 3, according to the method for producing light olefins from Fischer-Tropsch synthetic oil provided by the present invention, a significantly increased yield of light olefins can be obtained, and the content of oxygen-containing compounds in the cracked gas can be significantly reduced. Specifically, the yield of light olefins produced in Example 1 implemented according to the method of the present invention is as high as 49.45% by weight, and the content of methanol in the cracked gas ...
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