Autothermal Reformation for Hydrogen

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3 weeks 3 days ago #358 by Vico
Hello,

What are the modelling implications of ATR vs SMR for hydrogen production? There are two possible chemical reactions that can occur for ATR (with steam and w/o steam), what would one have to do to ensure accurate modelling of an ATR system using GHGenius?

Thank you

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3 weeks 1 day ago #359 by doconnor
Replied by doconnor on topic Autothermal Reformation for Hydrogen
Since there is no carbon in the product it must all end up as CO2 from the system. So as long as all of the inputs to the system are included, NG, power, O2, steam (as NG) and the outputs of the system are included in the modelling there shouldn't be any issues.

Don O'Connor

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3 weeks 5 hours ago - 3 weeks 2 hours ago #361 by Vico
Replied by Vico on topic Autothermal Reformation for Hydrogen
Thank you for your response. Another question that has come up, when modelling for the transportation distance of the natural gas to the SMR or ATR plant, which cells must be adjusted to assign this distance into the model? There are feedstock transportation inputs for Coal -> H2, but not for NG -> to H2.

Thank you
Last edit: 3 weeks 2 hours ago by Vico.

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2 weeks 6 days ago #362 by doconnor
Replied by doconnor on topic Autothermal Reformation for Hydrogen
The pathway is set up for the average natural gas transmission distance for the region that the model is set to. That distance can be found in cell BA326 on the Natural Gas supply sheet, if you are modelling Canada.

If you want to change that for hydrogen I would suggest that you go to the energy use sheet and multiple the value in CM11 by the fraction of the distance that you want to use divided by the distance for that region.

Regards
Don O'Connor

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1 week 4 days ago - 1 week 4 days ago #363 by Vico
Replied by Vico on topic Autothermal Reformation for Hydrogen
Hello,

Thanks for the previous responses.

A few more questions have cropped up:
  • I've reviewed other posts about sequestration. I was wondering what the cells P22-26 specify on the Sequestration Sheet? I've black boxed the entire system (SMR+CCUS+Liquefaction) and input the total natural gas and electricity inputs in the Alternative Fuel Production section of the Input page. Do P22-26 need to be filled, or can they be zeroed?
  • How can one specify the fuel type used for transportation of finished fuels (in this case hydrogen)?

Thank you
Last edit: 1 week 4 days ago by Vico.

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1 week 3 days ago #364 by doconnor
Replied by doconnor on topic Autothermal Reformation for Hydrogen
If you have accounted for the energy use for sequestration in the process inputs then you don't need to do that on the Sequestration Sheet.

Unfortunately there is no easy way to change the fuel used for transportation in the model.

Regards
Don O'Connor

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1 week 3 days ago #365 by Vico
Replied by Vico on topic Autothermal Reformation for Hydrogen
Thank you for the response.

Does the point on sequestration duties also apply to liquefaction if it occurs at the production facility? Is the electricity duty of liquefaction calculated using factors by the model on the backend, thus double counting emissions if the inputed duty on the "input" sheet includes the liquefaction electricity demand?

Thank you

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1 week 2 days ago #367 by doconnor
Replied by doconnor on topic Autothermal Reformation for Hydrogen
Yes, the electricity for liquefaction should only be counted once.

Regards
Don O'Connor

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