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Catalyst for regulating and controlling CO2 hydrogenation target product to be C2-4 olefin, and preparation method of catalyst

A catalyst, CO2 technology, used in metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, physical/chemical process catalysts, etc., can solve problems such as not being able to meet requirements, and achieve cheap raw materials and simple processes. Effect

Inactive Publication Date: 2020-06-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current iron-based catalyst alone cannot meet the target product of carbon dioxide hydrogenation to C 2-4 Olefin Requirements

Method used

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  • Catalyst for regulating and controlling CO2 hydrogenation target product to be C2-4 olefin, and preparation method of catalyst
  • Catalyst for regulating and controlling CO2 hydrogenation target product to be C2-4 olefin, and preparation method of catalyst
  • Catalyst for regulating and controlling CO2 hydrogenation target product to be C2-4 olefin, and preparation method of catalyst

Examples

Experimental program
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Effect test

Embodiment 3

[0056] A method for regulating CO 2 The target product of hydrogenation is C 2-4 The preparation steps of the catalyst (Cu-Fe double metal oxide adding 1%Na promoter) of olefin are as follows:

[0057] Same as Example 2, the difference is that the step of adding a co-catalyst is added: weigh 1g of the prepared catalyst d, dissolve the pre-calculated 0.078g sodium nitrate in 1ml of ethanol, configure it into a solution, soak the configured solution Put in catalyst d for 30 minutes, then vacuumize in a vacuum box for 1 hour, and dry at 150° C. for 20 hours to obtain the target catalyst.

[0058] The method of application of the catalyst is as follows:

[0059] Take by weighing 0.5g1%Na-double metal oxide first with synthesis gas (CO / H 2 =1) Activation is carried out, wherein the specific activation conditions are 300°C and the gas velocity is 5000h -1 (V / V), maintain for 10h, lower the room temperature of the activated catalyst, and then carry out hydrogenation reaction of c...

Embodiment 4

[0061] A method for regulating CO 2 The target product of hydrogenation is C 2-4 The preparation steps of the catalyst of olefin (Mn-Fe double metal oxide adds 1%Na cocatalyst) are as follows:

[0062] 1) Weigh 1.05g of ferric nitrate, 0.85g of manganese nitrate solution and 0.3g of Triton X-100 and dissolve them in 100ml of ethylene glycol until dissolved to obtain solution a;

[0063] 2) Weigh 5g of sodium carbonate and dissolve it in 50ml of isobutanol until dissolved to obtain solution b;

[0064] 3) Mix the two solutions of a and b to obtain solution c;

[0065] 4) Move solution c to a crystallization kettle, crystallize at 190°C for 30 hours under autogenous pressure, wash with 500ml of ionized water and 500ml of absolute ethanol successively, and dry the washed iron balls at 80°C for 15h to obtain Substance d;

[0066] 5) Addition of co-catalyst: Weigh 0.078g of sodium nitrate and dissolve it in 1ml of ethanol to make a solution, soak the substance d in the prepared...

Embodiment 5

[0071] Same as Example 3, the difference is: in the prepared catalyst: potassium nitrate is used instead of sodium nitrate, the result is similar to implementation 3.

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Abstract

The invention discloses a catalyst for regulating and controlling a CO2 hydrogenation target product to be C2-4 olefin, and a preparation method of the catalyst. The catalyst comprises a metal oxide and a cocatalyst, wherein the metal oxide is bimetal oxide microsphere particles and comprises one or more of the following oxides: iron-nickel, iron-copper, iron-molybdenum, cobalt-copper, iron-manganese and copper-manganese, and the cocatalyst comprises one or more of manganese, sodium, potassium, silicon, zirconium, copper, aluminum and zinc, and accounts for 0.1-20 wt% of the total amount of the catalyst. The selectivity of the catalyst to C2-4 olefin in a Fischer-Tropsch synthesis reaction is greater than or equal to 55%; and the catalyst is cheap in raw materials, simple in process and suitable for industrial production.

Description

technical field [0001] The invention relates to a novel catalyst preparation method, in particular to a method for regulating CO 2 The target product of hydrogenation is C 2-4 Catalysts and methods for their preparation. Background technique [0002] Catalytic conversion of carbon dioxide hydrogenation into chemical raw materials that are currently in short supply is the preferred method to alleviate the greenhouse effect and at the same time solve the unfavorable situation of energy shortage. Due to the complexity of the products of carbon dioxide catalytic hydrogenation, it is particularly important to effectively control their selectivity. [0003] Carbon dioxide undergoes multiple catalytic reactions on iron-based catalysts: Reverse water-gas shift (RWGS) on ferric iron tetroxide phase makes CO 2 、H 2 Converted to CO, H 2 O, the generated CO is then combined with H 2 Various alkenes were synthesized via the Fischer-Tropsch route. [0004] Fischer-Tropsch technology...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/887B01J23/889C07C1/12C07C11/02
CPCB01J23/78B01J23/8872B01J23/8892C07C1/12C07C2523/78C07C2523/887C07C2523/889C07C11/02
Inventor 张燚张三朋刘意
Owner BEIJING UNIV OF CHEM TECH
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