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How to deal with the error prom "Attempt to evaluate nonintegral power of negative number"?

Posted Feb 15, 2021, 1:41 a.m. EST Chemical Reaction Engineering Version 5.5 2 Replies

Khemrath
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Reaction Engineering Module OD simulation is used to simulation 3 step reduced reaction model. The reactor type is Batch, constant volume. The detail of forward rate constant and reaction rate is provided in the attachment file.! Reaction CH4+3/2O2=>CO+2H2O CO+1/2O2=>CO2 CO2=>CO+1/2O2

2 Replies Last Post Feb 16, 2021, 5:04 p.m. EST
Lasse Murtomäki
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Posted: 3 years ago Feb 16, 2021, 8:40 a.m. EST

I wonder why you get negative concentrations. Shorter time steps do not help?

I wonder why you get negative concentrations. Shorter time steps do not help?
Jeff Hiller COMSOL Employee

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Posted: 3 years ago Feb 16, 2021, 5:04 p.m. EST

The following Support Knowledge Base entry relates to this topic.

Best,

Jeff

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Jeff Hiller
The following [Support Knowledge Base entry](https://www.comsol.com/support/knowledgebase/952) relates to this topic. Best, Jeff

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