Method for preparing nickel-containing methanation catalyst quickly

Abstract

The invention relates to a method for preparing a nickel-containing methanation catalyst quickly. According to the method, the nickel-containing methanation catalyst is prepared from zirconium dioxide serving as a carrier, nickel oxide serving as an active ingredient and magnesium oxide and lanthanum oxide which serve as aids through the preparation of nitrate wet gel, drying and high-temperatureroasting by a sol-gel method and a high-temperature roasting method, wherein ingredients in the catalyst are dispersed uniformly; raw material gas is mixed with the catalyst and methanated quickly, and the catalyst has catalytic activity at low temperature; and products are high in heat stability and resistant to carbon deposition in catalytic reaction. By the preparation method, the harm of an organic template agent to human bodies and environment is avoided, and the pH value is not needed to be regulated and controlled by adding acid and alkali, so the method is easy to operate, simple, convenient and quick; and raw materials are abundant and proportioned reasonably, data is full and accurate, and the products are high in stability and anti-caking property, so the method is an ideal method for preparing the nickel-containing methanation catalyst quickly.

Description

technical field [0001] The invention relates to a rapid preparation method of a nickel-containing methanation catalyst, which belongs to the technical field of preparation and application of catalysts for producing synthetic natural gas from coke oven gas and coal. Background technique [0002] Natural gas is a clean fuel with high calorific value. Its main component is methane. After burning, it only emits carbon dioxide and water vapor, and does not produce waste water and waste residue. China is rich in coal, poor in oil, and low in gas resource distribution, especially natural gas. Resources are extremely scarce and cannot meet the country's demand for clean energy. Therefore, the contradiction between supply and demand of natural gas is prominent. Using coke oven gas or coal methanation to produce natural gas is a new way, which can improve resource utilization and reduce environmental pollution. The pollution of the environment also increases the safety of transportati...

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Problems solved by technology

[0003] Due to its acidity, basicity and redox characteristics, zirconium dioxide is widely used in the field of catalytic technology. Aluminum is the main carrier. Due to the limitations of the preparation process in application, it is difficult to adjust the performance of the catalyst, and the overall effect is not good. The patent CN1036710A using zirconia as the carrier adopts the precipitation method to load the active components on the zirconia carrier, but The activity of the prepared catalyst is very low; patents CN102029162A and CN101890353A use zirconium dioxide and other oxides as a composite carrier to prepare a methanation catalyst by precipitation method, because this method requires the use of a large amount of precipitant, which increases the production cost, and the preparation process is cumbersome , The time is long, the preparation process conditions are strict, and the industrialized mass production cannot be effectively guaranteed

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