Comparison test of desulfurizer

Since 1993, due to the improvement of processing capacity of the refineries in the Sinopec Corporation system or the blending of high-sulfur crude oil, the desulfurization depth of dry gas and liquid hydrocarbons has been insufficient. In this case, the high-efficiency desulfurizer with MDEA as the main agent has fully demonstrated its advantages of large sulfur capacity and good selectivity. Because the concentration of this agent can be as high as 50%, its circulation volume can be greatly reduced, it can be absorbed at high gas-liquid ratio or high liquid-liquid ratio, and the regeneration desorption heat of MDEA is smaller than the above three amines, thereby reducing In short, these characteristics can be summed up in one point, that is, using MDEA to remove acid gas can greatly reduce energy consumption and ultimately reduce operating costs. Nanjing Research Institute of Chemical Industry has conducted comparative tests on diethanolamine and other five solvents, and the test results are listed in Table 1, which explains why MDEA has become the main agent of high-efficiency desulfurizers. At the same time, it can also be seen from Table 1 that the performance of polyethylene glycol dimethyl ether in all aspects is comparable to that of MDEA. However, it must be noted that using it as a solvent is a physical absorption process. To achieve the same processing capacity, its consumption is more than that of MDEA, which increases the cost of desulfurization.

Comparative test of five desulfurizers