Catalyst for preparing methane by low-temperature oxidization of methane and preparation method and application thereof

A methane oxidation and catalyst technology, which is applied in the direction of oxidation reaction preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of needing ultraviolet light source and low methane conversion rate, etc., and achieve simple reaction system, low energy consumption, and single type Effect

Inactive Publication Date: 2010-11-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, patents such as US6156211, DE3101021A1 and US5720858 reported photocatalytic methane to methanol at lower temperatures, but this method requires an ultraviolet light source, and the conversion rate of methane is less than 9%

Method used

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  • Catalyst for preparing methane by low-temperature oxidization of methane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, take copper oxide as the catalyst and catalytic effect of active component

[0032] 1) Dissolve copper acetate in distilled water to obtain a concentration of 1.0×10 -2 mol / L solution, take 1g of sodium ion-exchanged ZSM-5 (Nankai University Catalyst Factory) and immerse in 35mL of the above solution, stir at room temperature for 24 hours, filter, and wash with deionized water. The obtained support was subjected to two processes of solution immersion, stirring, filtering and washing, and finally the obtained support was dried in air and calcined at 110° C. for 24 hours to obtain Catalyst 1 . The mass ratio of molecular sieve to copper in the catalyst 1 is 100:2.1. The metal copper is supported on the molecular sieve in the form of copper oxide particles, and the average particle diameter of the copper oxide particles is 3.6 nm.

[0033]2) In a high-pressure reactor (1 L), the air mixture containing 4% methane was used as the reactant, and 0.1 g of Cataly...

Embodiment 2

[0034] Embodiment 2, take copper oxide as the catalyst and catalytic effect of active component

[0035] 1) Dissolve copper acetate in distilled water to obtain a concentration of 2×10 -2 mol / L solution, take 1g of ZSM-5 exchanged by sodium ion and immerse in 35mL of the above solution, stir at room temperature for 24 hours, filter and wash with deionized water. The obtained carrier went through two processes of solution impregnation, stirring, filtering and washing, and finally the obtained carrier was dried in air and calcined at 110° C. for 24 hours to obtain Catalyst 2 . The mass ratio of molecular sieve to copper in the catalyst 2 is 100:2.5. The metal copper is loaded on the molecular sieve in the form of copper oxide particles, and the average particle diameter of the copper oxide particles is 4.0 nm.

[0036] 2) In a high-pressure reactor (1 L), the reaction was carried out at 60° C. for 3 hours with 0.1 g of Catalyst 2 to catalyze methane oxidation with an air mixtu...

Embodiment 3

[0037] Embodiment 3, take copper oxide and gold as the catalyst of active component and catalytic effect

[0038] 1) Mix and dissolve copper acetate and chloroauric acid (the molar ratio of copper to gold is 4:1) in distilled water to obtain a copper ion concentration of 1×10 -2 mol / L and gold ion concentration is 2.5×10 -3 mol / L mixed solution, take 1g of sodium ion-exchanged ZSM-5 and immerse in the above solution, stir at room temperature for 24 hours, filter and wash. The obtained carrier went through two processes of solution immersion, stirring, filtering and washing, and finally the obtained carrier was dried in air and calcined at 110° C. for 24 hours to obtain Catalyst 3 . The mass ratio of molecular sieve, copper, and gold in the catalyst 3 is 100:1.9:0.1 in turn, and the copper and gold are loaded on the molecular sieve in the form of composite oxidation state nanoparticles, and the average particle diameter of the nanoparticles is 6.5 nm.

[0039] 2) In a high-p...

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Abstract

The invention discloses a catalyst for preparing methane by low-temperature oxidization of methane and a preparation method and application thereof. The catalyst consists of a molecular sieve carrier and an active ingredient supported on the carrier; and the active ingredient comprises copper oxide or copper oxide and noble metal compound active ingredient, wherein the mass ratio of the molecular sieve to the copper in the copper oxide to the noble metal is 100:1-5:0-1. The molecular sieve serves as the carrier, and the preparation method for the catalyst comprises the following steps of: mixing a precursor copper acetate of the basic active ingredient or/and a metal precursor of the noble metal active ingredient in a certain ratio to prepare solution; and soaking the molecular sieve in the solution to allow the metals of the active ingredient to be supported on the carrier, and washing, drying and baking to prepare the catalyst. The catalyst can catalyze the methane oxidation at low temperature to prepare the methanol; a catalytic reaction system is simple; and the yield and selectivity of the target product methanol are high.

Description

technical field [0001] The invention relates to a catalyst for preparing methanol by low-temperature oxidation of methane, a preparation method and application thereof. Background technique [0002] The South my country Sea is one of the world's four major oil and gas gathering places, and its natural gas resources are very rich. As the water depth of natural gas fields increases, the offshore distance also increases. This will mean longer natural gas transmission pipelines and longer transportation distances of natural gas hydrate inhibitors (such as methanol), which will lead to a substantial increase in the construction cost of submarine pipelines, and a substantial increase in the transportation cost of hydrate inhibitors. On the other hand, thermodynamic injection agents such as methanol are necessary for the chemical recovery of natural gas hydrates. If they rely on land transportation, the cost of chemical injection agents will increase significantly as the offshore ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01J29/76C07C31/04C07C29/50
CPCY02P20/52
Inventor 李清平涂伟霞王志君刘伟姚海元白玉湖朱振宇康晓东
Owner CHINA NAT OFFSHORE OIL CORP
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