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Cerium-based catalyst for producing chloromethane by catalyzing oxidization reaction of methane chloride and preparation method thereof

A technology of methane chlorination and cerium-based catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, preparation of halogenated hydrocarbons, etc., and can solve the problems of high cost and large energy consumption. Achieve the effect of simple preparation method and stable catalytic performance

Inactive Publication Date: 2013-09-18
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the process of producing synthesis gas from methane is a strongly endothermic reaction (~800°C), this process has disadvantages such as high energy consumption and high cost.

Method used

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  • Cerium-based catalyst for producing chloromethane by catalyzing oxidization reaction of methane chloride and preparation method thereof
  • Cerium-based catalyst for producing chloromethane by catalyzing oxidization reaction of methane chloride and preparation method thereof
  • Cerium-based catalyst for producing chloromethane by catalyzing oxidization reaction of methane chloride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Catalyst preparation:

[0032] (1)CeO 2 Preparation of:

[0033] 3.47g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 20mL of deionized water, and 140mL of 9M NaOH solution was added under stirring, then transferred to an autoclave for 24 hours at 100°C, cooled, filtered with suction, washed, washed and filtered three times, and finally dried at 100°C for 5 hours, 550°C ℃ calcination for 6h to produce CeO 2 .

[0034] (2) 0.5wt%Pd / CeO 2 Catalyst preparation:

[0035] Mix 1.70 mL of 0.006 g / mL (calculated as Pd) palladium chloride solution in 20 mL of deionized water, and add 2.0 g of the CeO prepared above under stirring. 2 , after stirring continuously for 12h, evaporated to dryness in 80°C water bath, dried at 100°C for 5h, and calcined at 550°C for 6h to obtain 0.5wt%Pd / CeO 2 catalyst.

[0036] Catalyst Test:

[0037] The reaction was carried out in a fixed-bed flow reactor at normal pressure. The reactor was a quartz glass tube with an inner diameter of 10 mm. The ...

Embodiment 2

[0039] Catalyst preparation:

[0040] The operating process was carried out as in Example 1, and the consumption of the palladium chloride solution was changed to 3.30 mL. The obtained catalyst is 1.0wt%Pd / CeO 2 catalyst.

[0041] Catalyst Test:

[0042] According to the test conditions in Example 1, the activity evaluation results of Example 2 are listed in Table 1.

Embodiment 3

[0044] Catalyst preparation:

[0045] The operation process is carried out according to Example 1, and the consumption of palladium chloride solution is changed to 5.00mL. The resulting catalyst is 1.5wt%Pd / CeO 2 catalyst.

[0046] Catalyst Test:

[0047] According to the test conditions in Example 1, the activity evaluation results of Example 3 are listed in Table 1.

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Abstract

The invention provides a cerium-based catalyst for producing chloromethane by catalyzing oxidization reaction of methane chloride and a preparation method thereof, and relates to the cerium-based catalyst. The catalyst is Pd / CeO2 catalyst which is produced from cerium dioxide modified by palladium oxide, or Mn-Pd / CeO2 catalyst which is produced from cerium dioxide modified by palladium oxide and manganese together. The Pd / CeO2 catalyst is produced through the steps of: preparing CeO2 at first, adding a palladium salt solution to water and then adding the CeO2, evaporating to dryness in a water bath, and finally, performing drying and baking. The Mn-Pd / CeO2 catalyst is produced through the steps of: preparing CeO2 at first, mixing a manganese salt solution with a palladium salt solution in water and then adding the CeO2, evaporating to dryness in a water bath, and finally, performing drying and baking. The preparation method is simple and suitable for generating chloromethane by catalytically converting methane through the oxidization reaction of methane chloride. Besides, the catalyst is capable of obviously improving the selectivity of CH3Cl and the conversion rate of methane. The catalyst is also stable in catalytic performance for the oxidization reaction of methane chloride.

Description

technical field [0001] The invention relates to a cerium-based catalyst, in particular to a cerium-based catalyst for catalyzing the chlorine oxidation reaction of methane to produce methyl chloride and a preparation method thereof. Background technique [0002] The energy system in today's world is mainly based on three fossil resources: oil, coal and natural gas. As one of the three major fossil resources, natural gas has abundant reserves, high calorific value, and is a clean energy. my country's natural gas resources account for about 10% of the world's total resources. In addition, coalbed methane and shale gas reserves are also very rich. The main components of these gas resources are methane (CH 4 ), its content is 60% to 99%. In addition, methane is also one of the main greenhouse gases, and the greenhouse effect caused by it is CO 2 25 times. Therefore, the development of effective ways to convert methane into high value-added chemicals (such as aromatics, olef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J23/656C07C19/03C07C17/154C07C17/158
Inventor 王野孙振玲邓卫平吴雪娇张庆红何洁丽
Owner XIAMEN UNIV
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