Supported iron-based Fischer-Tropsch catalyst as well as preparation and application thereof

A catalyst, iron-based technology, applied in the field of preparation of the catalyst, can solve the problems of small production capacity and low activity

Active Publication Date: 2018-05-25
HIGHCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the shortcomings of the existing iron-based Fischer-Tropsch catalysts of low activity and low production capacity under medium and low temperature conditions, the inventors of the present inventio

Method used

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  • Supported iron-based Fischer-Tropsch catalyst as well as preparation and application thereof
  • Supported iron-based Fischer-Tropsch catalyst as well as preparation and application thereof

Examples

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preparation example Construction

[0068] The carbon carrier preparation method of the present invention generally includes the steps of solution preparation, sol-gel reaction, ball formation, washing and drying, carbonization and inorganic template removal.

[0069]In step 1) as solution preparation step, phenols and formaldehyde selected from phenol and resorcinol are taken such that the phenol / aldehyde molar ratio is 1:1-1:3, preferably 1:1.5-1:2.5 , the phenols and formaldehyde jointly constitute an organic precursor. The polycondensate obtained by the combined polymerization of monomers of phenols selected from phenol and resorcinol and formaldehyde makes pelletization easy in subsequent steps. The organic precursor is then prepolymerized to form a sol solution, which facilitates spheroidization in subsequent steps.

[0070] In step 2) as a sol-gel reaction step, the organic precursor obtained in step 1) is dissolved in water selected from deionized water, pure water and ultrapure water, and then added to...

Embodiment 1

[0104] (1) Preparation of spherical mesoporous carbon supports

[0105] Dissolve 4.85 grams (0.044mol) of resorcinol and 7.16 grams of formalin (37% formaldehyde, formaldehyde is 0.088mol) in 15 grams of deionized water, add 0.05 grams of sodium carbonate as a catalyst, then add 25 grams of commercially available Hard templating agent silica nanoparticles LUDOX SM-30, and keep stirring. Add 5.49 grams of deionized water to ensure that the mass ratio of the total amount of the organic precursor and the inorganic template to the deionized water is 32.5 / 25. The obtained solution was placed in a water bath at 45° C., stirred and reacted for 45 minutes to obtain a sol solution. 270 g of liquid paraffin and 0.2 g of surfactant Span80 were placed in the reactor, the temperature was raised to 85° C., and the stirring rate in the reactor was controlled to be 200 rpm. The obtained sol solution was slowly poured into the reaction kettle, stirred for 0.5 h, and then aged in a water bath...

Embodiment 2

[0111] (1) Preparation of spherical mesoporous carbon supports

[0112] The preparation of the spherical mesoporous carbon support is exactly the same as the preparation of the spherical mesoporous carbon support in Example 1.

[0113] (2) Loading of active metal iron and additives

[0114] 1.25 g of ferric nitrate nonahydrate and 0.02 g of potassium carbonate were ultrasonically dissolved in 1 g of deionized water to obtain impregnation solution A. A ceramic evaporating dish containing 0.5 g of the above-prepared spherical mesoporous carbon was placed in an ultrasonicator, and the ultrasonic power was adjusted so that the spherical mesoporous carbon kept vibrating but could not fly out of the ceramic evaporating dish. Add the immersion solution A dropwise into the ceramic evaporating dish. During the dropping process of the impregnating liquid, the spherical mesoporous carbon was continuously stirred with a plastic key, so that the impregnating liquid was evenly dispersed o...

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Abstract

The invention relates to a supported iron-based Fischer-Tropsch catalyst. The supported iron-based Fischer-Tropsch catalyst contains a spherical mesoporous carbon support, an active component iron located on the support and an optional catalyst promoter, wherein the specific surface area of the spherical mesoporous carbon support is 500-1000 m<2>/g, pore volume is 1.5-3.5 cm<3>/g, and average porediameter is 9-30 nm. According to the catalyst, spherical mesoporous carbon with high pore volume and large pore diameter is taken as the support, not only can high loading capacity of iron be realized, but also when the prepared catalyst is applied to the Fischer-Tropsch reaction, high Fischer-Tropsch reactivity and high productivity can be obtained, and particularly, CO conversion rate is remarkably increased and hydrocarbon productivity is improved. The invention further relates to preparation of the catalyst and an application of the catalyst to the Fischer-Tropsch reaction.

Description

technical field [0001] The invention relates to a supported iron-based Fischer-Tropsch synthesis catalyst, and also relates to a preparation method and application of the catalyst. Background technique [0002] With the gradual depletion of petroleum resources and the increasing demand for energy, the production of fuels or chemicals through alternative or sustainable processes has attracted more and more attention from scientists and industrialists in various countries. Fischer-Tropsch synthesis is based on synthesis gas (mainly containing CO and H 2 mixture) is a chemical reaction process in which raw materials synthesize hydrocarbons (including fuels and chemicals, etc.) under catalysts and appropriate conditions. Carbon-containing resources such as coal, natural gas, and biomass can obtain syngas through gasification or reforming reactions, and then obtain fuels and chemicals through Fischer-Tropsch synthesis, which is expected to replace petroleum routes. [0003] Cur...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/78B01J35/08B01J35/10B01J37/02B01J37/34C10G2/00
CPCB01J23/745B01J23/78B01J35/08B01J35/1023B01J35/1047B01J35/1061B01J37/0248B01J37/343C10G2/332
Inventor 椿范立柴剑宇陈庆军龙东辉李永烨
Owner HIGHCHEM
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