Coal-to-oil synthesis
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Does anyone know what the circulation ratio is for coal-to-oil systems, which need to return the gas exiting the reactor to the reactor inlet in order to increase the overall conversion rate?
I heard that it requires three cycles, with a conversion rate of over 30% for each cycle, resulting in an overall conversion rate of around 90%. I’m not sure what the actual situation in production is like.
The circuit we usually use has a loop at the end of the system; as for the circuit in the reactor, we are not familiar with it. The conversion rate is generally around 30; for example, with 30T of feedstock, about 10T of residue oil is produced for cracking and reforming
Some literature states that the one-way conversion rate is 60%; I wonder what the actual figure is?
I’m talking about the end-loop of the system you mentioned… What is the ratio of the air volume in your end loop to the volume of fresh air?
I’m talking about the end-loop of the system you mentioned… What is the ratio of the air volume in your end loop to the volume of fresh air?
I’m talking about the end-loop of the system you mentioned… What is the ratio of the air volume in your end loop to the volume of fresh air?
First of all, it depends on your process: choose either a direct loop for a single segment, or combine two segments and use a loop for them. Set a one-way conversion rate. The number of cycles required for an overall conversion rate is thus determined
Generally, we use a ratio of recycled gas/fresh gas of 1.8 to 2.4, with a one-pass conversion rate of 35% and an overall conversion rate of around 65%
Fresh syngas: 780,000 + 280,000 Nm3/h; recycled syngas: 440,700 + 230,000 Nm3/h. Approximate order of magnitude