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[Jacobaum]

Hi everyone,

I’m currently working on my senior chemical engineering design project, which focuses on the production of liquid fuels from biogas via steam reforming.

In short, the process includes the following main sections:

1. Biogas pretreatment – H₂S removal using Fe-EDTA solution and compression;

2. Steam reforming of methane to produce syngas (H₂ + CO);

3. Fischer–Tropsch synthesis, converting syngas into liquid hydrocarbons;

4. Hydrotreating / upgrading to remove residual impurities and improve fuel quality;

5. A distillation or fractionation column to separate gasoline- and diesel-range products.

 

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I’m attaching my current process flow diagram (From DWSIM) and would really appreciate feedback from those with experience in process design or syngas-to-liquids systems:

• Do you think any important unit operation or process block is missing?

• Does any part of the flowsheet look redundant or unrealistic?

• Are there aspects that could be simplified or better represented?

For simplicity, the liquid products were grouped as gasoline and diesel, following my advisor’s suggestion to keep the system manageable. We also tried to simulate the process in DWSIM, but we couldn’t get the full system to converge properly.

Any technical comments or suggestions would be greatly appreciated, i'll be glad with any help