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Foam carbon-based catalyst and preparation method and application thereof

A carbon foam and catalyst technology, applied in the preparation of hydroxyl compounds, chemical instruments and methods, and hydrocarbon production from carbon oxides, can solve problems affecting product distribution, product secondary reactions, etc., and achieve excellent anti-coking and anti-oxidation performance, promotion of reduction, effect of not easy deactivation

Inactive Publication Date: 2018-10-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these carriers that have been studied so far have obvious diffusion restrictions on Fischer-Tropsch reactants and products, and will cause secondary reactions of products, thereby affecting product distribution.

Method used

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  • Foam carbon-based catalyst and preparation method and application thereof
  • Foam carbon-based catalyst and preparation method and application thereof
  • Foam carbon-based catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of preparation method of the foamed carbon base Fe catalyst that can be used for Fischer-Tropsch synthesis, the steps are as follows:

[0049] 1. Pretreatment of carbon foam material:

[0050] 1) Weigh 2.0g foam carbon (specific surface area is 10m 2 / g, containing macropores and mesopores) was added to 40mL of 68wt% nitric acid aqueous solution, stirred at 60°C after mixing, and heated to reflux for 2h to obtain a mixed solution;

[0051] 2) The above mixed solution was filtered, washed with deionized water to pH ≈ 7, and then dried at 60° C. for 10 h to obtain surface-treated carbon foam.

[0052] 2. Preparation of foamed carbon-based Fe catalyst:

[0053] Weigh 1.6g of ferric nitrate, 0.01g of potassium nitrate, 0.35g of manganese nitrate and 0.08g of copper nitrate, add 10mL of water after mixing to prepare a solution, impregnate the solution with 2.0g of surface-treated foam carbon, and pump Vacuum, and then put it in a drying oven to dry, the drying temp...

Embodiment 2

[0058] Same as Example 1, the difference is: in step 1, the method for pretreating the foamed carbon material is:

[0059] 1) Weigh 0.8g foam carbon (specific surface area is 200m 2 / g, containing micropores and mesopores) was added to 100mL34wt% nitric acid aqueous solution, stirred at 100°C after mixing, and heated to reflux for 20h to obtain a mixed solution;

[0060] 2) The above mixed solution was filtered, washed with deionized water to pH ≈ 7, and then dried at 150° C. for 20 h to obtain surface-treated carbon foam.

[0061] All the other are the same as step 2 and step 3 of embodiment 1, and the reaction results are shown in table 1.

Embodiment 3

[0063] Same as Example 1, the difference is: in step 2, the method for preparing the foamed carbon-based Fe catalyst is:

[0064] Weigh 1.6g of ferric nitrate and add 10mL of water to prepare a solution, impregnate the solution with 2.0g of surface-treated foam carbon, then vacuumize at room temperature, and then put it in a drying oven to dry at a temperature of 60°C and a constant temperature of 48h. And calcined at 800°C for 8h under Ar atmosphere to obtain Fischer-Tropsch synthesis foam carbon-based Fe catalyst.

[0065] Wherein, the loading amount of active metal in the obtained catalyst is about 10wt%.

[0066] All the other are the same as Step 1 and Step 3 of Example 1, and the reaction results are shown in Table 1.

[0067] Table 1 Fischer-Tropsch synthesis catalyst reaction results

[0068]

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Abstract

The invention discloses a foam carbon-based catalyst and relates to the field of catalysts. The foam carbon-based catalyst is prepared from a carrier which is porous foam carbon with a treated surfaceas well as active metals or active metals and additives combined on the surface of the carrier, wherein the active metals are selected from one or more of the following elements: iron, cobalt, nickel, copper, molybdenum, tungsten, ruthenium, platinum and rhodium, and the active metals exist in the form of a simple substance, an oxide or a carbide; and the additives are selected from one or more of the following elements: manganese, potassium, silver, calcium, magnesium, zirconium, aluminum, zinc, sodium and phosphorus, and the additives exist in the form of a simple substance or an oxide. Thefoamed carbon-based catalyst can adjust and control the selectivity of a reaction product when in use, and the catalytic reaction performance of the catalyst can be improved. The invention also discloses a preparation method and application of the catalyst.

Description

technical field [0001] The present invention relates to the field of catalysts. More specifically, it relates to a foamed carbon-based catalyst and its preparation method and application. Background technique [0002] The catalytic conversion of carbon monoxide to liquid fuels or chemicals is the core process of the indirect conversion and utilization of non-oil-based carbon resources such as coal, coal bed methane, shale gas and biomass. Because the products of the catalytic conversion reaction of carbon monoxide hydroconversion are complex and diverse, the control of its selectivity is extremely important. Taking the Fischer-Tropsch synthesis reaction of hydrogenation of carbon monoxide to produce hydrocarbons as an example, the products of traditional catalysts obey the Anderson-Schulz-Flory (ASF) distribution, which is wide and the product selectivity is poor. Tropson catalysts are a major challenge in this direction. [0003] In the research of Fischer-Tropsch synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/745B01J23/89B01J27/19B01J23/652C10G2/00C07C1/04C07C9/04C07C29/154C07C31/04C07C2/00C07C15/04C07C2/86C07C15/06C07C29/00C07C31/20
CPCB01J23/6527B01J23/745B01J23/8892B01J23/892B01J23/8953B01J27/19C07C1/0435C07C2/00C07C2/864C07C29/00C07C29/154C10G2/33C10G2/331C10G2/332C10G2/333C10G2300/70C07C9/04C07C31/04C07C15/04C07C15/06C07C31/202C07C31/205C07C31/207Y02P20/52
Inventor 张燚刘意
Owner BEIJING UNIV OF CHEM TECH
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