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Catalyst for preparing synthetic gas by partially oxidizing methane and preparation method of catalyst

A technology for catalyst and synthesis gas, which is applied in the field of catalyst for partial oxidation of methane to synthesis gas and its preparation field, can solve the problems of complex catalyst preparation method and low space velocity, and achieves stable catalyst activity, simple preparation process and low precious metal content. Effect

Active Publication Date: 2015-04-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the catalyst is complicated and only suitable for reaction conditions with low space velocity.

Method used

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  • Catalyst for preparing synthetic gas by partially oxidizing methane and preparation method of catalyst
  • Catalyst for preparing synthetic gas by partially oxidizing methane and preparation method of catalyst
  • Catalyst for preparing synthetic gas by partially oxidizing methane and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Catalyst preparation: select 10g SiO 2 As a carrier, soak it in 20% nitric acid solution for 24 hours, wash it with distilled water until pH = 6.5-7.0, and dry it for later use; weigh 0.0098g of rhodium acetylacetonate and dissolve it in 20ml of acetylacetone solution, then weigh cerium acetylacetonate Dissolve 0.0763g in 60ml of acetylacetone, mix the two solvents to form a mixed impregnation solution, and weigh the treated SiO 2 Add 0.5g into the mixed impregnation solution for immersion for 24h, stir several times during the period, then evaporate the solution to dryness at 110°C, and roast in the air at 800°C for 2h with a heating rate of 1°C / min to obtain the catalyst 0.5%Rh-5%CeO 2 / SiO 2 .

[0020] Evaluation conditions: Before the reaction, the catalyst was reduced with hydrogen at 700°C for 1 hour. The reaction is carried out in a continuous sampling fixed-bed quartz reactor, the reaction temperature is 700°C, and the raw material gas is composed of CH 4 :O...

Embodiment 2

[0023] Catalyst preparation Referring to Example 1, the solvent is changed from acetylacetone to toluene, and the rest of the conditions are the same to obtain the catalyst 0.5%Rh-10%CeO 2 / SiO 2 The evaluation conditions are the same as in Example 1, and the evaluation results are shown in Table 1.

[0024] Table 1

[0025]

Embodiment 3～5

[0026] Examples 3-5: Catalyst preparation Referring to Example 1, the mass of cerium acetylacetonate was changed to 0.1525g, 0.3050g, and 0.4575g respectively, and the rest of the conditions were the same to obtain the catalyst 0.5%Rh-10%CeO 2 / SiO 2 , 0.5%Rh-20%CeO 2 / SiO 2 , 0.5%Rh-30%CeO 2 / SiO 2 . The evaluation conditions are the same as in Example 1, and the evaluation results are shown in Table 2.

[0027] Table 2

[0028]

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Abstract

The invention discloses a catalyst for preparing a synthetic gas by partially oxidizing methane and a preparation method of the catalyst, and relates to nano catalysts for preparing synthetic gases. The catalyst for preparing the synthetic gas by partially oxidizing methane takes SiO2 as a carrier and CeO2 as an additive, and is prepared from the following components in percentage by mass: 0.005-1% of an active component Rh, 5-30% of an additive CeO2 and the balance of SiO2, wherein the particle size of Rh is 1-2nm and the specific surface area of Rh is 350-450m<2> / g. The preparation method comprises the following steps: 1) soaking the carrier in a nitric acid solution, washing till the pH value is 6.5-7.0 and drying for later use; 2) respectively preparing a rhodate solution and a cerate solution according to the content ratios of the components of the catalyst, and mixing the solutions into a mixed steeping liquid according to the ratios of the components of the catalyst; and 3) mixing SiO2 obtained in the step 1) with the steeping liquid obtained in the step 2), steeping, drying, and roasting, so as to obtain the catalyst for preparing the synthetic gas by partially oxidizing methane.

Description

technical field [0001] The invention relates to a nanometer catalyst for preparing synthesis gas, in particular to a catalyst for preparing synthesis gas by partial oxidation of methane and a preparation method thereof. Background technique [0002] The main component of natural gas and shale gas is methane. With the large-scale exploitation and utilization of natural gas and shale gas, the effective utilization of methane has attracted more and more attention. One of the effective ways to convert methane into high value-added products is to convert it into synthesis gas, which is then used to produce methanol, liquid fuels and other chemical products. Compared with the traditional steam reforming of methane to synthesis gas, partial oxidation of methane to synthesis gas has the advantages of small reactor volume, fast reaction rate, low energy consumption, and the carbon-hydrogen ratio of the product is suitable for subsequent methanol and Fischer-Tropsch synthesis. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J35/10C01B3/40
CPCY02P20/52
Inventor 翁维正谢贻华李兵黄传敬万惠霖
Owner XIAMEN UNIV
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