What are the process flow and principle of the ethylene project?
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Could some expert please explain the process flow of the ethylene project, especially regarding the heat treatment section? I would be very grateful
Is there any expert in manufacturing who can reply?
We would like to know what progress has been made in coal-based ethylene production at present?
Well, I just want to know about the manufacturing process; specifically, what is the main function of the heating area?
Ethylene from coal? Is it the direct production of ethylene from syngas? ? ? :o
Propylene distillation, decarboxylation of C4, C5, and similar processes
Ethylene projects can be divided into two main categories based on raw materials: petrochemical ethylene and coal-based ethylene. Petrochemical ethylene is produced by the high-temperature cracking of light hydrocarbons, which yields a mixture of olefins as well as small molecular alkanes and alkynes; through separation and conversion, the alkynes can be transformed back into olefins. The remaining alkanes can be reused. Typical processes include ABB-Lummus, Linde, Stone-Webs, etc. Coal-based ethylene is actually produced through a coalification process: first, syngas is obtained, which is then used in the Fischer-Tropsch synthesis to produce the relevant raw materials (primarily methanol). Subsequent cracking yields mixed olefins; depending on the choice of cracking catalyst and process conditions, the product can be predominantly propylene or a mixture of olefins. Additionally, for the method of producing olefins directly from syngas, there are currently only process research reports; no industrial or practical applications have yet been developed.