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A kind of preparation method of synthesis gas catalyst by partial oxidation of methane

A catalyst and synthesis gas technology, which is applied in the field of preparation of cobalt-based catalysts for partial oxidation of methane to synthesis gas, can solve the problems of poor solubility, unfavorable environmental protection, and high catalyst cost, and achieve uniform dispersion, environmental protection, and raw material costs. cheap effect

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst showed good reactivity and stability for the partial oxidation of methane to synthesis gas, but the nonionic surfactant polyoxypropylene polyoxyethylene copolymer (P123) and aluminum source aluminum isopropoxide used in the preparation process The price is more expensive, and the solubility is poor, and a large amount of organic solvents need to be used in the synthesis, resulting in higher catalyst costs, which is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Catalyst preparation:

[0028] Co(NO 3 ) 2 ·6H 2 O and Mg(NO 3 ) 2 ·6H 2 O dissolved in citric acid aqueous solution, add cetyltrimethylammonium bromide (CTAB), stir until completely dissolved, add Al(NO 3 ) 3 ·9H 2 O, stir at room temperature for 24 hours, and then stir at 60°C to form a gel. The resulting gel is aged at 30°C for 11 hours, dried at 100°C for 9 hours, and calcined at 750°C for 3 hours to obtain a mass percentage Co is 3%, Mg is 3% Co-Mg-Al 2 O 3 The catalyst, in which the molar ratio of citric acid: CTAB: aluminum element: water is 0.15:0.2:1:100. The evaluation results are shown in Table 1.

Embodiment 2

[0030] The preparation of the catalyst refers to Example 1, and the Co(NO 3 ) 2 ·6H 2 O and Mg(NO 3 ) 2 ·6H 2 The amount of O, add Al(NO 3 ) 3 ·9H 2 O to prepare a mixture, then add urea to the mixture, stir at room temperature for 24 hours, and then stir at 70°C to form a gel, the resulting gel is aged at 40°C for 10 hours and dried at 110°C for 8 hours. Calcined at 700°C for 4 hours to obtain Co-Mg-Al with a mass percentage of Co of 8% and Mg of 6% 2 O 3 The catalyst, in which the molar ratio of citric acid: CTAB: aluminum element: urea: water is 0.55:0.5:1:0.8:110. The evaluation results are shown in Table 1.

Embodiment 3

[0032] The preparation of the catalyst refers to Example 1, and the Co(NO 3 ) 2 ·6H 2 O and Mg(NO 3 ) 2 ·6H 2 The amount of O, the gel obtained is aged at 50℃ for 9 hours, dried at 120℃ for 7 hours, and calcined at 700℃ for 4 hours, to obtain Co-Mg-Al with a mass percentage of Co of 14% and Mg of 9% 2 O 3 The catalyst, in which the molar ratio of citric acid: CTAB: aluminum element: water is 0.9:0.9:1:120. The evaluation results are shown in Table 1.

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PUM

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Abstract

The invention discloses a preparation method of a catalyst for syngas preparation by methane partial oxidation, and the method comprises the following steps: preparing gel of a mixed solution of cobalt soluble salt, alkaline earth metal soluble salt, a surfactant, aluminium inorganic salt, organic acid, and water at 50-90 DEG C, preferably 60-80 DEG C, then performing aging, drying and roasting to obtain the product. The catalyst prepared by the method of the invention has the advantages of high dispersion of active components, high catalytic activity, excellent carbon deposition resistance, high stability and low cost.

Description

Technical field [0001] The invention relates to a preparation method of a catalyst for preparing synthesis gas by partial oxidation of methane, in particular to a preparation method of a cobalt-based catalyst for preparing synthesis gas by partial oxidation of methane. Background technique [0002] More than 90% of natural gas components are methane. Re-synthesis of fuel and chemicals from methane through synthesis gas is one of the effective ways to utilize natural gas. Compared with the traditional steam reforming method, the partial oxidation of methane to syngas has the advantages of small reaction vessel volume, fast reaction rate, low energy consumption, and the generated synthesis gas is suitable for methanol and Fischer-Tropsch synthesis feed gas. In addition, the development of methane partial oxidation technology may replace the strongly endothermic methane steam reforming process for the production of synthesis gas, especially for the utilization of remote or offshore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/75C01B3/40
CPCY02P20/52
Inventor 孙晓丹张舒冬张信伟倪向前李杰梁皓张喜文
Owner CHINA PETROLEUM & CHEM CORP
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