Development process of methanation technology

Prior to methanation process, CO and CO2 are generally removed by copper washing process.At present, copper washing technology still exists in some high sulfur processes, especially in coal head plants.However, the copper washing process has the advantages of high cost, large pollution and cumbersome operation. The advantage is that it is not sensitive to sulfur chlorine and other poisons. Therefore, conditional plants (such as natural gas and coke oven gas processes with good desulfurization conditions) are gradually changed to methanation, and most of the new coal chemical industry also uses this process.The current methanation process is broadly divided into two main directions:

The conventional process, that is, the operating pressure is within 10Mpa and the airspeed is about 5000h;

High pressure and high space speed process, that is, the operating pressure is above 10Mpa, generally above 13Mpa, and the space speed is above 1000h-1: the latter mostly appears after the methanol synthesis process in the double A process of coal head plant, and also before the hydrogenation catalyst.

Methanation catalysts are nickel catalysts supported by alumina and other auxiliaries.The production and development of domestic methanation catalysts began in the 1960s.