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Method for preparing cobalt-base catalyst used for partial oxidation of methane for preparing synthesis gas

A cobalt-based catalyst, gas-cobalt-based technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation process and achieve selectivity Good, good catalyst repeatability, easy conditions

Inactive Publication Date: 2010-11-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active components of the catalyst are not easy to sinter and lose, and have good stability, but the preparation process is relatively complicated

Method used

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  • Method for preparing cobalt-base catalyst used for partial oxidation of methane for preparing synthesis gas
  • Method for preparing cobalt-base catalyst used for partial oxidation of methane for preparing synthesis gas
  • Method for preparing cobalt-base catalyst used for partial oxidation of methane for preparing synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Catalyst preparation: Dissolve P123 (4.5g) in 100ml of absolute ethanol at room temperature, add 7.5ml of concentrated nitric acid, add 10.2g of aluminum isopropoxide under vigorous stirring, stir until aluminum isopropoxide is completely dissolved, add 0.7535gCo(NO 3 ) 2 ·6H 2 O, and then dried in an oven at 60°C for 2 days, and the obtained sample was calcined in a muffle furnace at 700°C for 1 hour to obtain Co-Al with a mass percentage of Co of 6%. 2 o 3 catalyst.

[0025] The high-magnification transmission electron microscope image of the prepared sample can be found in figure 1 , N of the prepared sample 2 Adsorption-desorption isotherms see figure 2 . Depend on figure 1 It shows that the catalyst has an ordered mesoporous structure, and no Co species agglomerated particles are found, indicating that the Co species is highly dispersed; in figure 2 There is an obvious type IV adsorption isotherm H1 hysteresis loop, indicating the existence of mesoporous...

Embodiment 2～4

[0028] Catalyst preparation Referring to Example 1, the calcination temperature was changed to 500, 600 and 800°C respectively, and the rest of the conditions were the same. Catalysts prepared at different calcination temperatures were subjected to N 2 Low temperature physical adsorption characterization, the results are shown in Table 1. The evaluation conditions refer to Example 1, the reduction temperature is changed to 800°C, and the rest of the conditions are the same. The evaluation results are shown in Table 1.

[0029] Table 1 Co-Al prepared at different calcination temperatures 2 o 3 The specific surface area, pore structure and reaction performance of the catalyst

[0030]

Embodiment 5

[0032] Catalyst preparation with reference to embodiment 1, Co(NO 3 ) 2 ·6H 2 O is replaced by 0.646g Co(CH 3 CO 2 ) 2 4H 2 O, the rest of the conditions are the same, and Co-Al with a Co mass percentage of 6% is prepared 2 o 3 catalyst. The evaluation conditions are the same as in Example 1, and the evaluation results are shown in Table 2.

[0033] Table 2 Co-Al prepared by different precursor salts 2 o 3 Catalyst Reactivity

[0034]

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Abstract

The invention discloses a method for preparing a cobalt-base catalyst used for partial oxidation of methane for preparing synthesis gas, relates to a catalyst and provides a method for preparing a carbon deposition-free cobalt-base catalyst which is used for partial oxidation of methane for preparing synthesis gas and has high activity, selectivity and stability. The cobalt-base catalyst takes Co as an active ingredient and the general formula of the cobalt-base catalyst is Co-Me-Al2O3, wherein Me represents alkaline-earth metal and exists in the form of oxide. The method comprises the following steps of: dissolving a non-ionic surface active agent in absolute ethyl alcohol; adding nitric acid and aluminum isopropoxide into the mixed solution; after the nitric acid and the aluminum isopropoxide are dissolved, adding precursor salt of cobalt and alkaline-earth metal nitrate into the mixed liquor; after the precursor salt of cobalt and the alkaline-earth metal nitrate are dissolved, obtaining a sample; drying the sample to obtain xerogel; and baking the xerogel to obtain the cobalt-base catalyst.

Description

technical field [0001] The invention relates to a catalyst, in particular to a preparation method of a cobalt-based catalyst used for preparing synthesis gas. Background technique [0002] The chemical utilization of natural gas is mainly realized through catalytic conversion into synthesis gas, and the cost of the production process of synthesis gas accounts for 60% or even more of the cost of the whole process of conversion and utilization of natural gas. Compared with the traditional steam reforming of methane to produce synthesis gas, partial oxidation of methane (POM) to produce synthesis gas has the advantages of less investment, high efficiency, and low energy consumption, and the hydrogen-carbon ratio of the production of synthesis gas is suitable for methanol synthesis and Fischer-Tropsch Synthesis and other follow-up processes. Therefore, since the 1990s, the partial oxidation of methane to synthesis gas has attracted extensive attention from researchers at home a...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/75C01B3/40
CPCY02P20/52
Inventor 黄传敬刘瑞艳张诺伟翁维正万惠霖
Owner XIAMEN UNIV
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