How is methane separated from ethylene in industry?
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RT! Is it possible to use non-distillation methods to avoid the need for energy-intensive cryogenic processes?
Without deep cooling, only adsorption or membrane separation can be considered. PSA nitrogen production has been relatively successful in separating oxygen from nitrogen; it’s not clear whether this approach is feasible, and there are no known examples of its application. I only know the concept of membrane separation, but not the way to implement it
Adsorption separation or membrane separation can both be used.
Thank you for the reply! Given that there may not be any real-world examples of adsorption and membrane separation, I was wondering if the absorption-desorption process could be used instead?
Thank you for the answer. Are there any existing mature process examples?
This approach is good; using low-temperature methanol washing to separate hydrogen sulfide and carbon dioxide seems quite unusual. It’s similar to adsorption, but I’m not aware of any successful cases
The industrial technology for separating methane from ethylene and recovering ethylene is the absorption+desorption process. In refineries, the units used for recovering ethylene, ethane, propylene, and butane from dry gas almost always employ the absorption process, as it offers the best balance in terms of energy consumption and efficiency.
Thank you for the reply! Do you have any materials you can share?