Methanation catalyst, preparation process thereof and methanation reaction device

Abstract

The invention belongs to the fields of new chemical process techniques and new energy development, in particular to a methanation catalyst, a preparation process thereof and a methanation reaction device for the catalyst. The methanation catalyst comprises the following components in percentage by mass: 10-60 percent of nickel compound serving as an active component, 0-5 percent of auxiliary agent and the balance of carrier. The preparation process for the methanation catalyst comprises the steps of dissolving, mixing, dipping, precipitating, filtering, drying, forming and the like. The methanation reaction device comprises at least two units of reducing separate heat pipe phase change heat removing combined devices, wherein each reducing separate heat pipe phase change heat removing combined device comprises a reactor, reducing pipes at the two ends of the reactor, more than one heat absorbing section in the reactor and a condensate steam package which is connected with the heat absorbing section.

Description

[0001] technical field [0002] The invention belongs to the field of new chemical process technology and new energy development, and in particular relates to a methanation catalyst, its preparation process and a methanation reaction device used for the catalyst. [0003] Background technique [0004] Natural gas is a high-efficiency, high-quality clean fuel, and the world's demand has grown rapidly in recent years. Studies have shown that from 2000 to 2009, the average annual growth rate of China's natural gas consumption was nearly 16%, reaching 88.7 billion cubic meters in 2009, and the average annual growth rate of production in the same period was about 13%. However, the shortage of natural gas resources in China has restricted the production and application of natural gas, and the annual "gas shortage" has also had a negative impact on economic development. In 2009, China’s natural gas imports alone reached 7.8 billion cubic meters, and its dependence on foreign coun...

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Problems solved by technology

However, this method does not have any research description on the catalyst methanation catalyst, and the water-cooled tubes are in a high-temperature state, the water is vaporized in the cooling tubes, and the cooling equipment is subject to large and variable thermal load impacts, which is prone to cycle pulsation, and may even Film boiling occurs, causing the cooling equipment to overheat and burn out, and the heat transfer process is difficult to control

With this partition wall heat exchange, the temperature difference between the inside and outside of the heat exchange tube is large, the heat flux density is high, the flow velocity inside and outside the tube is high, and there is fluid erosion and wear. Once a leak occurs, all the water in the entire heat exchange system will leak to In the reactor, an accident state occurred, causing huge losses; at the same time, there were certain safety hazards in the methanation equipment using the water-cooled tubular structure

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