Low temperature methanol washing absorption tower
Thread Content
In the gas purification section, if the low-temperature methanol washing process is used, the upper section of the absorption tower mainly absorbs carbon dioxide, and the lower section mainly absorbs hydrogen sulfide, which is a multi-component absorption. What is the specific absorption process? If we want to carry out material and heat balance for this absorption tower, how should we do it? If we want to carry out process simulation in ASPEN, how should we do it? All heroes, please feel free to discuss.
We absorb it in two towers respectively, one tower absorbs hydrogen sulfide, and the lower section absorbs other components. The second tower absorbs carbon dioxide.
The two towers absorb the two components of hydrogen sulfide and carbon dioxide at the same time. However, the solubility of hydrogen sulfide in methanol is relatively large, so it mainly absorbs hydrogen sulfide. The two towers mainly absorb carbon dioxide.
Whether it is absorption or distillation, the principle is Henry's law. Please refer to the book "Principles of Chemical Engineering". However, as for multi-component absorption, the class's chemical engineering principles textbook uses single-component absorption as an example.