Activation synergist for natural gas decarburization based on MDEA method

Abstract

An activation synergist for natural gas decarburization based on an MDEA method is an activation synergist for natural gas decarburization based on the MDEA method, the activation synergist comprises an amidine compound, an alcohol compound, an alcohol amine compound and a rubber swelling corrosion inhibitor, the provided activation synergist can effectively improve the removal of carbon dioxide, during the process application process, good circular utilization of the activation synergist is realized, the regeneration of the activation synergist can be realized at a low temperature, and the activation synergist has the characteristics of low energy consumption, high CO2 removal efficiency, and low equipment corrosion, and has a good popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of natural gas purification and gas separation, and in particular relates to an activation synergist for natural gas decarbonization based on the MDEA method. Background technique [0002] Coal, oil, and natural gas are the three major energy sources and have a wide range of applications. In comparison, natural gas is clean, hygienic, and environmentally friendly, and has been widely used in more and more countries. However, with the development of natural gas, It was found that the content of carbon dioxide contained in its components is high, which not only reduces the calorific value of natural gas, but also causes carbon dioxide corrosion. When cooling natural gas, due to the low temperature, carbon dioxide will solidify and form dry ice, which will easily cause equipment blockage and seriously affect Its use also affects its value. At present, the country has required that the natural gas standard be u...

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Problems solved by technology

[0002] As the three major energy sources, coal, oil, and natural gas have a wide range of applications. In comparison, natural gas is clean, hygienic, and environmentally friendly, and has been widely used in more and more countries. However, with the development of natural gas exploitation, It is found that the content of carbon dioxide contained in its components is high, which not only reduces the calorific value of natural gas, but also causes carbon dioxide corrosion. When cooling natural gas, due to the low temperature, carbon dioxide will solidify and form dry ice, which will easily cause equipment blockage and seriously affect affects its usefulness and its value

At present, the country has required that the natural gas standard be upgraded from the second class to the first class, and the first class standard natural gas is widely promoted. It can effectively desulfurize, and the decarburization effect can reach the standard of second-class gas. Many experts and literature reports add activators to MDEA to solve this problem, but after practical application, it is found that there are certain problems and risks, such as Mao Songbai, etc. The addition of activators 1,5-diazabicyclo-undec-5-ene (DBU), hydroxyethylpiperazine, piperazine, 2-amino-2-methyl-1-propanol was proposed, but After practical application and research, it is found that the system has a certain corrosion performance on the system equipment, which is easy to cause leakage of the system connection, and has a serious dissolution effect on the rubber pad, which leads to certain risks in the operation of the system. The cycle performance of the system with oxazine and other components will decrease after cyclic operation, and some added components will be oxidized, showing the phenomenon of discoloration of the decarburized solution

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