I am currently working on simulation of Fast Pyrolysis of Oil palm biomass to produce bio-oil whereby I am using RCSTR as a pyrolysis reactor so that I can optimize pyrolysis temperature and residence time.
However, after running my simulation I keep getting the Aspen error that some of the kinetic reactions that I specified in the RCSTR reactor does not satisfy the mass balance (The kinetic reactions were obtained from literature). Then it asks me to check stoichiometry/Molecular weights. I tried to check both but no luck.
Hope that you guys can enlighten me on this if you have faced similar issue.
Akbar Ahmed Nassor
There are several reasons for the mass balance issue, so you probably did not consider N or S in your reaction. You need to calculate the stoichiometry of your reaction for C, H, N, S and O and make sure they are balanced. You need also to specify your biomass as wet basis. You may also need to check the molecular weights of the representative compounds involved in the simulation and make sure that they are consistent with Aspen database.
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