Please, experts, offer some guidance! Are low-temperature methanol washing and pressure swing adsorption decarbonization comparable?
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Please, experts, offer some guidance! Are low-temperature methanol washing and pressure swing adsorption decarbonization comparable? Is it all about decarbonization? Well, low-temperature methanol washing removes both sulfur and carbon, while pressure swing adsorption only removes carbon! If pressure swing adsorption is used for carbon removal, then what about desulfurization in the previous stage? Build a 300,000-ton coal-to-methanol plant. If pressure swing adsorption decarburization is used, how should the desulfurization and shift units in the preceding stage be designed?
There is an overcapacity in methanol production; most companies are currently losing money, so it’s better to look for other projects
The transformation can be designed however you like； Medium-Low-Low ； All low variations are acceptable ； Desulfurization can be carried out using liquid alkaline solutions ； However, it is best to use low-temperature methanol washing ； Alkaline desulfurization is basically a process that has been phased out
Advantages of the low-temperature methanol washing process: The low-temperature methanol washing process is a method for purifying gases by using methanol at low temperatures to absorb H₂S, other sulfur-containing compounds, CO₂, HCN, gaseous hydrocarbons with 3 carbon atoms or more, water vapor, and other substances. This process is based on physical absorption. It can purify gases with high precision, reducing the total amount of S in the gas to no more than 1. While pressure swing adsorption also removes H2S, it can only achieve levels of up to 15 mg, and its effectiveness declines over time.
First, how to design it depends on what type of gasification method you will use? Atmospheric pressure fixed-bed? Gas flow bed or fluidized bed?
It depends on what your gas phase consists of; if it contains a large amount of sulfur, then your hypothesis is contradictory. If it has to be done in a way that goes against the current mainstream design, then it means the technology is outdated.