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Iron-based catalyst used in low-temperature slurry bed Fischer-Tropsch synthesis, and preparation method and application thereof

An iron-based catalyst, a Fischer-Tropsch synthesis technology, applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, catalysts for physical/chemical processes, etc., to achieve the effects of low methane selectivity, reduced selectivity, and low cost

Active Publication Date: 2016-01-06
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This catalyst is only suitable for medium temperature (240-280°C) slurry bed reactor

Method used

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  • Iron-based catalyst used in low-temperature slurry bed Fischer-Tropsch synthesis, and preparation method and application thereof
  • Iron-based catalyst used in low-temperature slurry bed Fischer-Tropsch synthesis, and preparation method and application thereof
  • Iron-based catalyst used in low-temperature slurry bed Fischer-Tropsch synthesis, and preparation method and application thereof

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Experimental program
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preparation example Construction

[0038] refer to figure 1 , the preparation method of the iron-based catalyst that is used for low temperature slurry bed Fischer-Tropsch synthesis provided by the invention, comprises the following steps:

[0039] Step S10: preparing a mixed salt solution: according to the molar ratio of copper, iron, and additives, the nitrates of copper, iron, and additives are prepared into a mixed salt solution;

[0040] Step S20: Prepare a precipitant solution: prepare a precipitant solution containing an alkali metal into a precipitant solution;

[0041] Step S30: co-precipitation reaction: first disperse a part of the carrier in the deionized water bottom liquid, and then flow the mixed salt solution in step S10 and the precipitant solution in step S20 into the ionized water bottom liquid for co-precipitation reaction;

[0042] Step S40: preparing slurry: after the precipitation is completed, aging, separation and washing are performed to obtain the slurry;

[0043] Step S50: preparin...

Embodiment 1

[0067] Fe(NO 3 ) 2 9H 2 O, Cu(NO 3 ) 2 ·3H 2 O and Zr(NO 3 ) 4 ·5H 2 O is dissolved in a certain amount of deionized water by Fe / Cu / Zr=1 / 1 / 1 (molar ratio) to form a mixed salt solution with a total metal ion concentration of 2mol / L, and Na 2 CO 3 Dissolved in a certain amount of deionized water to form Na + Precipitant solution with a concentration of 2mol / L.

[0068] Using the double-drop co-precipitation method, the above-mentioned mixed salt solution and the precipitant solution were co-precipitated, wherein the bottom liquid was deionized water (100ml), and a certain amount of Al was dispersed in advance. 2 o 3 Sol (Al 2 o 3 / catalyst total mass=10%, mass ratio), control the pH of the titration environment to be 6, control the titration temperature at 50°C, after the titration is complete, age at 50°C for 2h in the mother liquor, centrifuge and wash 6 times to obtain the slurry .

[0069] Add a certain amount of Al to the slurry 2 o 3 Powder (Al 2 o 3 / c...

Embodiment 2

[0073] Fe(NO 3 ) 2 9H 2 O, Cu(NO 3 ) 2 ·3H 2 O, Mn(NO 3 ) 2 (50%), Mg(NO 3 ) 2 ·6H 2 O is dissolved in a certain amount of deionized water by Fe / Cu / Mn / Mg=1 / 3 / 1 / 1 (molar ratio) to form a mixed salt solution with a total metal ion concentration of 2mol / L. 2 CO 3 Dissolved in a certain amount of deionized water to form Na + Precipitant solution with a concentration of 2mol / L.

[0074] Using the double-drop co-precipitation method, the above-mentioned mixed salt solution and the precipitant solution were co-precipitated, wherein the bottom liquid was deionized water (100ml), and a certain amount of Al was dispersed in advance. 2 o 3 Sol (Al 2 o 3 / catalyst total mass=30%, mass ratio), control the pH of the titration environment to be 7, control the titration temperature at 60°C, after the titration is complete, age 0.5h at 60°C in the mother liquor, obtain the slurry after centrifugation and washing 6 times material.

[0075] Add a certain amount of Al to the slur...

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Abstract

The invention provides an iron-based catalyst used in low-temperature slurry bed Fischer-Tropsch synthesis, and a preparation method and an application thereof. The iron-based catalyst comprises the following components: iron, copper, an auxiliary agent and a carrier. The auxiliary agent is any one or two selected from transition metals, rare earth metals or alkaline earth metals. The transition metals comprise manganese, zirconium and zinc. The rare earth metals comprise lanthanum and cerium. The alkaline earth metals comprise magnesium, calcium and barium. A molar ratio of copper to iron is 0.5-20. A molar ratio of the auxiliary agent to iron is 0-10. The carrier accounts for 10-80% of the iron-based catalyst by weight. Compared with the prior art, according to the iron-based catalyst provided by the invention, the proportion of copper in the iron-based catalyst is increased; the iron-based catalyst does not contain a K electron auxiliary agent, such that methane selectivity of the K electron auxiliary agent is reduced; the iron-based catalyst provided by the invention has high low-temperature activity, and can be used in the low-temperature slurry bed Fischer-Tropsch synthesis. The iron-based catalyst also has the advantages of low methane selectivity, low cost and simple preparation. The preparation method is suitable for industry expansion.

Description

technical field [0001] The invention relates to an iron-based catalyst and its preparation method and application field, in particular to an iron-based catalyst for low-temperature slurry bed Fischer-Tropsch synthesis, its preparation method and application. Background technique [0002] Fischer-Tropsch synthesis technology refers to the synthesis gas (CO+H) obtained from coal, natural gas, and biomass 2 ) into hydrocarbon fuels and high value-added chemicals, first discovered by German scientists Frans Fischer and HansTropsch in 1923 and named after their first letter, F-T, referred to as F-T synthesis. Relying on Fischer-Tropsch synthesis technology, not only ordinary petroleum products such as gasoline, diesel and kerosene can be refined, but also high-quality petroleum products such as aviation fuel and lubricating oil, as well as various high value-added products such as olefins and paraffins can be refined. [0003] Fischer-Tropsch synthesis mainly uses three reactors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C10G2/00
Inventor 孙予罕钟良枢吕东王新星齐行振王慧李晋平孙志强冯永发
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI