Fischer-Tropsch synthesis naphtha modification method
A technology of Fischer-Tropsch synthesis and naphtha, which is applied in naphtha processing, petroleum industry, and hydrocarbon oil processing. It can solve problems affecting reaction selectivity, reactor overheating, and potential safety hazards, and achieve an increase in octane number Effect
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example 1
[0042] The modified catalysts used in the examples and comparative examples of the present invention were prepared.
[0043] (1) Preparation of carrier
[0044] Take 67.6 kg of pseudo-boehmite powder (produced by Sasol Company, with an alumina content of 74% by mass), and under stirring conditions, add 300 kg of nitric acid aqueous solution with a concentration of 1.1% by mass, stir for 2 hours to peptize, and then add 55.0 kg of oxidized HZSM-5 zeolite powder (zeolite content: 91% by mass) with a silicon / alumina molar ratio of 60 was stirred at high speed for 3 hours. Drop the prepared slurry into an oily ammonia column containing 8% by mass of ammonia water, take out the wet ball formed in the oily ammonia column, dry at 60°C for 10 hours, and roast at 550°C for 3 hours to obtain a carrier, which is an HZSM-5-containing Zeolite 50% by mass alumina pellets.
[0045] (2) Preparation of modified catalyst
[0046] Get 50 kilograms of carrier, use 50 kilograms containing 4.7 m...
example 2
[0049] This example presses figure 1 The flow process shown carries out the upgrading reaction, and the reaction device is provided with two moving bed reaction zones, and the first moving bed reaction zone includes two moving bed reactors, which are respectively the first reactor 22 and the second reactor 23, and the second moving bed reaction zone The bed reaction zone includes a moving bed reactor, that is, the third reactor 25, three reactors are connected in series, filled with the modified catalyst prepared in Example 1, and the loading amount of each reactor is the same. Before the reaction, the modified catalyst was activated in the reaction device, the activation medium was nitrogen, the pressure was 0.3MPa, the volume ratio of nitrogen to catalyst was 500:1, the activation treatment temperature was 400°C, and the activation time was 2h.
[0050] The proportion of Fischer-Tropsch synthetic naphtha in the total feed of the upgraded raw material is 50% by mass, the prop...
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Abstract
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