Vd w bonds #2706
Vd w bonds #2706
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bjkreitz
added
Complexity: Medium
Topic: Catalysis
Status: WIP
Regression Testing ResultsWARNING:root:Initial mole fractions do not sum to one; normalizing. Detailed regression test results.Regression test aromatics:Reference: Execution time (DD:HH:MM:SS): 00:00:01:07 aromatics Passed Core Comparison ✅Original model has 15 species. aromatics Failed Edge Comparison ❌Original model has 106 species. Non-identical thermo! ❌
thermo: Thermo group additivity estimation: group(Cs-(Cds-Cds)(Cds-Cds)(Cds-Cds)H) + group(Cds-Cds(Cds-Cds)(Cds-Cds)) + group(Cds-CdsCsH) + group(Cds-CdsCsH) + group(Cds-Cds(Cds-Cds)H) + group(Cds-Cds(Cds-Cds)H) + group(Cds-CdsCsH) + group(Cdd-CdsCds) + Estimated bicyclic component: polycyclic(s4_6_6_ane) - ring(Cyclohexane) - ring(Cyclohexane) + ring(124cyclohexatriene) + ring(124cyclohexatriene) Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics: Non-identical kinetics! ❌
kinetics:
Observables Test Case: Aromatics Comparison
✅ All Observables varied by less than 0.500 on average between old model and new model in all conditions! aromatics Passed Observable Testing ✅Regression test liquid_oxidation:Reference: Execution time (DD:HH:MM:SS): 00:00:02:11 liquid_oxidation Failed Core Comparison ❌Original model has 37 species. liquid_oxidation Failed Edge Comparison ❌Original model has 202 species.
Observables Test Case: liquid_oxidation Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! liquid_oxidation Passed Observable Testing ✅Regression test nitrogen:Reference: Execution time (DD:HH:MM:SS): 00:00:01:27 nitrogen Failed Core Comparison ❌Original model has 41 species. nitrogen Failed Edge Comparison ❌Original model has 133 species.
Observables Test Case: NC Comparison
✅ All Observables varied by less than 0.200 on average between old model and new model in all conditions! nitrogen Passed Observable Testing ✅Regression test oxidation:Reference: Execution time (DD:HH:MM:SS): 00:00:02:26 oxidation Passed Core Comparison ✅Original model has 59 species. oxidation Passed Edge Comparison ✅Original model has 230 species.
Observables Test Case: Oxidation Comparison
✅ All Observables varied by less than 0.500 on average between old model and new model in all conditions! oxidation Passed Observable Testing ✅Regression test sulfur:Reference: Execution time (DD:HH:MM:SS): 00:00:00:56 sulfur Passed Core Comparison ✅Original model has 27 species. sulfur Failed Edge Comparison ❌Original model has 89 species.
Observables Test Case: SO2 Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! sulfur Passed Observable Testing ✅Regression test superminimal:Reference: Execution time (DD:HH:MM:SS): 00:00:00:40 superminimal Passed Core Comparison ✅Original model has 13 species. superminimal Passed Edge Comparison ✅Original model has 18 species. Regression test RMS_constantVIdealGasReactor_superminimal:Reference: Execution time (DD:HH:MM:SS): 00:00:02:23 RMS_constantVIdealGasReactor_superminimal Passed Core Comparison ✅Original model has 13 species. RMS_constantVIdealGasReactor_superminimal Passed Edge Comparison ✅Original model has 13 species.
Observables Test Case: RMS_constantVIdealGasReactor_superminimal Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! RMS_constantVIdealGasReactor_superminimal Passed Observable Testing ✅Regression test RMS_CSTR_liquid_oxidation:Reference: Execution time (DD:HH:MM:SS): 00:00:05:53 RMS_CSTR_liquid_oxidation Passed Core Comparison ✅Original model has 37 species. RMS_CSTR_liquid_oxidation Failed Edge Comparison ❌Original model has 206 species. Non-identical kinetics! ❌
kinetics:
Observables Test Case: RMS_CSTR_liquid_oxidation Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! RMS_CSTR_liquid_oxidation Passed Observable Testing ✅Regression test fragment:Reference: Execution time (DD:HH:MM:SS): 00:00:00:43 fragment Passed Core Comparison ✅Original model has 10 species. fragment Passed Edge Comparison ✅Original model has 33 species.
Observables Test Case: fragment Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! fragment Passed Observable Testing ✅Regression test RMS_constantVIdealGasReactor_fragment:Reference: Execution time (DD:HH:MM:SS): 00:00:03:04 RMS_constantVIdealGasReactor_fragment Passed Core Comparison ✅Original model has 10 species. RMS_constantVIdealGasReactor_fragment Passed Edge Comparison ✅Original model has 27 species.
Observables Test Case: RMS_constantVIdealGasReactor_fragment Comparison
✅ All Observables varied by less than 0.100 on average between old model and new model in all conditions! RMS_constantVIdealGasReactor_fragment Passed Observable Testing ✅beep boop this comment was written by a bot 🤖 |
Motivation or Problem
There are a couple of species that we currently cannot handle in RMG when generating mechanisms for heterogeneously catalyzed reactions, because we have no way to represent them in RMG. One of these species is bidentate formate *OC(H)*O.
This adsorbate is a bidentate species, where both oxygen adatoms have the same distance to the surface. Formate is an important intermediate in many reactions mechanisms, like methanation or methanol synthesis. The only way to draw a Lewis structure for this species is to assume a resonance structure, where one of the oxygens doesn't have a bond to the surface. It is necessary to tell RMG that this is a bidentate species and that both oxygen atoms are coordinated with the surface atoms. There is also a stable monodentate formate species and our Lewis structure for the bidentate needs to be different from the monodentate.
Description of Changes
I adjusted RMG to handle this structure (and similar adsorbates) by introducing a vdW bond between the oxygen and the surface atom. This tells RMG that the oxygen and the surface atom are connected.
These vdW bonds occur only in multidentate adsorbates that have another covalent bond with the surface. If a reaction recipe leads to a species with only vdW bonds to the surface, RMG still removes those and forms a physisorbed structure.
Testing
I was able to generate a mechanism with the bidentate formate and it can also participate in reactions, when I provide new reaction families that can form and break this bond.
Reviewer Tips
This is still a work in progress and requires further updates. I'm just looking for initial thoughts on whether this approach is the right one to address this issue.