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Catalyst for CO hydrogenation reaction, preparation method and application thereof

A catalyst and oxide technology, which is applied to the catalyst for preparing high-carbon hydrocarbons and the field of preparation thereof, can solve the problems of increasing workload and energy consumption such as gas circulation compression, and achieve the effect of high single-pass conversion rate.

Active Publication Date: 2014-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a higher yield of hydrocarbons, iron-based catalysts are considered suitable to work with a lower single-pass conversion rate of CO, and to achieve a high total CO conversion rate (synthesis gas utilization rate) and a high Hydrocarbon selectivity, but this working method increases the workload of tail gas separation, gas cycle compression and corresponding energy consumption, which limits the improvement of the overall efficiency of the Fischer-Tropsch synthesis process

Method used

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  • Catalyst for CO hydrogenation reaction, preparation method and application thereof
  • Catalyst for CO hydrogenation reaction, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare a mixed aqueous solution containing ferric nitrate and lanthanum nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 1.2:1, slowly add citric acid to the mixed aqueous solution, and stir while adding. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, place it in a muffle furnace and roast at a constant temperature of 800 °C for 4 hours to obtain a composite metal oxide LaFeO with a perovskite structure. 3-y , using the impregnation method in the composite metal oxide LaFeO 3-y The additive potassium with a weight content of 5% was loaded on it, dried at 80°C for 8 hours, and calcined at 350°C for 4 hours to obtain a catalyst which was designated as C-1. The evaluation results are shown in Table...

Embodiment 2

[0023] Prepare a mixed aqueous solution containing ferric nitrate, cerium nitrate and nickel nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 2:1, slowly add citric acid to the mixed aqueous solution, and add While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, place it in a muffle furnace and roast at a constant temperature of 700 °C for 6 hours to obtain a composite metal oxide CeFe with a perovskite structure. 0.9 Ni 0.1 o 3-y , using the impregnation method on the composite metal oxide CeFe 0.9 Ni 0.1 o 3-y Zinc with a weight content of 10% was loaded on it, and the prepared catalyst was recorded as C-2, and the evaluation results are shown in Table 1.

Embodiment 3

[0025] Prepare a mixed aqueous solution containing neodymium nitrate, iron nitrate and nickel nitrate, weigh an appropriate amount of citric acid according to the molar ratio of citric acid to the total amount of metal ions in the mixed aqueous solution is 2:1, slowly add citric acid to the mixed aqueous solution, and add While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out the dried precursor, place it in a muffle furnace and roast at a constant temperature of 700 °C for 6 hours to obtain a composite metal oxide NdFe with a perovskite structure. 0.9 Ni 0.1 o 3-y , using the impregnation method in the composite metal oxide NdFe 0.9 Ni 0.1 o 3-y Zinc with a weight content of 10% was loaded on it, and the prepared catalyst was recorded as C-3, and the evaluation results are shown in Table 1.

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Abstract

The invention discloses a catalyst for a CO hydrogenation reaction. The catalyst is composed of a composite metal oxide having a perovskite structure and a metal auxiliary agent, the composite metal oxide having a perovskite structure has a formula of ABO<3-Y>, wherein the A represents rare earth metals, the B represents transition metals comprising iron, the mole ratio of iron to other transition metals is not less than 3:1, and preferably not less than 4:1, and the y represents the mole number of oxygen vacancy existing in the composite metal oxide; by the weight of the catalyst, the simple substance auxiliary metal content is 1 to 15%, and preferably is 5% to 10%. The catalyst not only can improve the one-way conversion rate of the syngas, but also can effectively reduce the CO2 selectivity.

Description

technical field [0001] The invention relates to a catalyst for hydrogenation of CO and its preparation method and application, in particular to a catalyst for preparing high-carbon hydrocarbons with synthesis gas as a raw material, its preparation method and application. Background technique [0002] Liquid fuel is the blood on which modern society depends, and it is mainly produced through crude oil refining and processing. In recent years, due to concerns about the prospect of crude oil supply, the price of liquid fuels has continued to rise. At the same time, the extensive use of liquid fuels has also brought serious environmental pollution problems. The establishment of sustainable clean liquid fuel production methods is the solution to the above two problems. effective means. The Fischer-Tropsch synthesis process refers to the conversion of carbon-containing resources such as coal, natural gas, and biomass into synthesis gas (CO and H 2 The mixture of synthetic gas), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/889C10G2/00
CPCY02P30/40
Inventor 桂兴华姜蕊
Owner CHINA PETROLEUM & CHEM CORP
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