14.50 Air Quality Assessment of a Carbon Capture Centre.pdf

1. L E T I C I A C A M P E L L O – A I R Q U A L I T Y C O N S U L T A N T
10TH OCTOBER 2023
Air Quality Assessment of a
Carbon Capture Centre.

2. Overview.
PROJECT DESCRIPTION.
MODELLING INPUT AND ASSUMPTIONS.
MODELLING RESULTS & SUMMARY.

3. Net zero carbon strategy is at
the core of building design in
the United Kingdom.
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Image Source: https://openbooks.lib.msu.edu/isb202/chapter/nutrient-cycling-and-systems-thinking/

4. Project Description.

5. Project Description.
− Two growing barns and one carbon capture centre.
− Growing barns equipped with vertical farming.
− Carbon capture centre equipped with pyrolysis
machines.
− Crops from the growing barns to feed into the
pyrolysis machines.
− Waste organic material from off-site.
Image sourced from: https://berkshire.com/
Images sourced from: https://pyreg.com/our-technology/

6. Project Description.
− Pyrolysis process is the thermal decomposition of
materials without oxygen.
− Crops from the growing barns turned into biochar
using pyrolysis.
− The pyrolysis process is generally self-fuelled by
synthetic gas (syngas)
− Typically, heat sources are required during start up
process.
Images sourced from: https://pyreg.com/our-technology/
Pyrolysis Process.

7. Project Description.
− Biochar allows carbon capture from the atmosphere.
− Large-scale production of biochar can slow down
increase in greenhouse gas concentrations.
− Dispersion modelling of pyrolysis machine flues.
− Pyrolysis machine flue design to minimise on-site and
off-site air quality impacts.
Crops
(biomass)
Pyrolysis
Machines
Biochar
Vertical
farm soil
Carbon
capture

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Modelling Input & Assumptions.

9. CO
Carbon
Monoxide
NOx
Nitrogen
Oxides
PM10
Particulate
Matter
PM2.5
Particulate
Matter
SO2
Sulphur
Dioxide
HCl
Hydrogen
Chloride
Modelled Pollutants.
Modelling Inputs & Assumptions.
− Pollutant concentrations modelled using ADMS-5.
− Syngas used for both start-up and normal operation.
− Biochar facility operating continuously throughout an entire
year.
− Worst-case pollutant emissions using any typical biomass
feedstock.
− Stack parameters based on estimates regarding feedstock.
− Potential impacts on sensitive human health receptors in the
vicinity of the site.

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Results & Summary.

11. Results.
− Process contribution annual mean NO2 concentrations
shown in the contour plot.
− Predicted annual mean NO2 concentrations at existing
sensitive receptors were below relevant Air Quality
Objectives.
− Negligible off-site impacts at modelled sensitive
receptors.
− Negligible on-site impacts at modelled grid.

12. Results.
− Process contribution 1-hour mean NO2 concentrations
shown in the contour plot.
− Short-term impacts below 10% of relevant Air Quality
Objectives.
− Negligible off-site impacts at modelled sensitive
receptors.
− Negligible on-site impacts at modelled grid.

13. AIR QUALITY ASSESSMENT OF A CARBON CAPTURE CENTRE
Summary.
- AIR DISPERSION MODELLING TO ASSESS IMPACTS TO AIR
QUALITY FROM PYROLYSIS PROCESS;
- IMPORTANT TO ENSURE A ROBUST ASSESSMENT WHILST
MANAGING UNKNOWNS;
- MODELLING CHALLENGES INCLUDE:
- Wide range of pollutants dependent on the feedstock;
- Variable pollutant emissions; and
- Long run times.

14. Thank you.
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