Work starting method for slurry bed Fisher-Tropsch synthesis
A Fischer-Tropsch synthesis and slurry bed technology, which is used in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of accelerated catalyst deactivation, increased water pressure in the system, unfavorable industrial operation, etc., and achieves improved stability and initial activity. High and low selectivity effects
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example 1
[0021] Weigh an appropriate amount of reduced 20%Co0.8%Pt3%Zr / SiO 2 (Wt.) Fischer-Tropsch synthesis catalyst and paraffin, the volume ratio of catalyst and paraffin is 1:4, put it into the slurry bed reactor, and pass the mixed gas of hydrogen containing water vapor into the reactor after airtight and gas replacement And turn on the stirring device, the volume concentration of water vapor in the mixed gas is 2.5%, and the volumetric space velocity of the mixed gas is 1000h -1 , raise the temperature to 350°C, control the pressure to 3.5 MPa, cool down to 220°C and 2.0 MPa after 2.5 hours, switch to H 2 / CO=2 (molar ratio) synthesis gas for Fischer-Tropsch synthesis. The reaction effluent was collected by hot trap and cold trap respectively. The conversion rate of the catalyst, methane selectivity and 200h stability test results are listed in Table 1.
example 2
[0023] Weigh an appropriate amount of reduced 20%Co1%Ni3%Zr / TiO 2 (Wt.) Fischer-Tropsch synthesis catalyst and paraffin, the volume ratio of catalyst and paraffin is 1:5, put it into the slurry bed reactor, and pass the mixed gas of hydrogen containing methanol vapor into the reactor after airtight and gas replacement And turn on the stirring device, the volume concentration of water vapor in the mixed gas is 5%, and the volumetric space velocity of the mixed gas is 1500h -1 , raise the temperature to 300°C, control the pressure to 3MPa, after 1.5h, lower the temperature and pressure to 220°C and 2.0 MPa, switch to H 2 / CO=2 (molar ratio) synthesis gas for Fischer-Tropsch synthesis. The reaction effluent was collected by hot trap and cold trap respectively. The conversion rate of the catalyst, methane selectivity and 200h stability test results are listed in Table 1.
example 3
[0025] Weigh an appropriate amount of reduced 20%Co0.05%Ru3%Zr / Al 2 o 3 (Wt.) Fischer-Tropsch synthesis catalyst and paraffin, the volume ratio of catalyst and paraffin is 1:5, put it into the slurry bed reactor, pass the hydrogen mixed gas containing acetone vapor into the reactor after airtight and gas replacement And turn on the stirring device, the volume concentration of acetone vapor in the mixed gas is 2%, and the volumetric space velocity of the mixed gas is 800h -1 , raise the temperature to 250°C, control the pressure to 2.5MPa, after 1h, lower the temperature and pressure to 220°C, 2.0 MPa, switch to H 2 / CO=2 (molar ratio) synthesis gas for Fischer-Tropsch synthesis reaction. The reaction effluent was collected by hot trap and cold trap respectively. The conversion rate of the catalyst, methane selectivity and 200h stability test results are listed in Table 1.
[0026] Table 1 Reactivity of catalysts.
[0027] catalyst Initial activity and selectivi...
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