Biochar Production in Combustion Co-product Systems

[R-45Q4-0, Projects must evidence they meet the additional system eligibility criteria specific to production in combustion co-product systems.]

In addition to all other requirements, to be eligible for creditingcertificate issuance under this Module combustion co-product pyrolysis systems must meet the following criteria;

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[G-P03N-0, Projects must evidence that biochar is a defined, intentional output of the process, and not solely an incidental residue.]

• Biochar is a defined, intentional output of the process, and not solely an incidental residue. I.e., the biochar produced must comply with the Additionality requirements set out in Section 2.5.3. of the Isometric Standard.

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[G-9MZA-0, Projects must evidence that the system produces a reproducible and consistent biochar product that can be sampled and characterized in accordance with the requirements of the Protocol.]

• The boiler system produces a reproducible and consistent biochar product that can be sampled and characterized in accordance with the requirements of the Biochar Production and Storage Protocol.

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[G-X9TZ-0, Projects must evidence that boiler operations meet or exceed the minimum performance and emissions thresholds required of pyrolysis reactors.]

• Boiler operations meet or exceed the minimum performance and emissions thresholds required of pyrolysis reactors (e.g., stable operation within target temperature ranges, controlled feedstock handling), during the operating periods where biochar is being produced.

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[R-QTJS-0, Projects must evidence they meet the additional sampling and analysis requirements specific to production in combustion co-product systems.]

Given the distinct characteristics of combustion co-product systems, Isometric has additional requirements on both production batch definitions and sampling methods. Unless otherwise stated, Project Proponents must still refer to all other requirements listed in the Biochar Production and Storage Protocol and relevant storage Module.

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[G-GYPM-0, The Project's sampling regime must comply with the Production Batch and Production Process definitions and durations.]

For initial sampling under Method A, a production batch is defined as biochar produced every 7 days (or if triggered by any of the ‘deviation’ criteria listed below). The maximum duration maintains sufficient measurement accuracy given the quantities of biochar produced. Note, a new Production Process is counted only if the variations listed below persist for > 6 hours, or otherwise listed.

• Fire box average temperature (Based on a rolling average of the prior 24 hourly temperatures across active boilers).
  • Above 450°C, ± 75°C (842°F, ± 167°F) should be the maximum temperature deviation.
  • Below 450°C (842°F) , temperature variation should be less than ± 20%
    • Depending on the biochar characterization data, this may be increased subject to agreement with Isometric.
• Feedstock
  • Any time the feedstock changes material or source, as defined in the Biomass Feedstock Accounting module, and/or the feedstock composition shifts by ± 20%.
• Feedstock residence time in reactor
  • If the feedstock residence time deviates from ± 20% of what is defined in the Project Design Document (PDD) for a typical production process
• Oxygen dosing
  • Oxygen levels must not exceed 8% in the fire box.
    • Depending on the biochar characterization data, this may be increased subject to agreement with Isometric.

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[G-4KJ9-0, The sampling and analysis regime must comply with the additional analysis.]

Suppliers must follow the sampling requirements outlined in the Biochar Production and Storage Protocol, with the following exceptions:

• Method A, sampling every batch for 60 samples (e.g., a minimum 3 samples per batch from the first 20 batches), this is to establish the variability of the Production process, before transitioning to Method B.
  • This whichmust willconsist followof a minimum 3 samples per batch from the samefirst guidelines20 laidbatches.
  • Only outthree insamples per batch can contribute to the Moduletotal count toward the 60-sample requirement.
    • As detailed in Biochar Production and Storage Protocol, the first 30 samples of the 60 need to include the ‘full suite’ of analysis detailed in the table of the appropriate Biochar Storage Module.
      • Three samples from the first 30 also need to include heavy metals, Polychlorinated Biphenyls (PCBs), Polycyclic Aromatic Hydrocarbons (PAHs), Polychlorinated Dibenzo-p-dioxins (PCDDs), and Volatile Matter or Fixed Carbon.
      • The remaining 30 samples under Method A only need to include those parameters needed for CO₂e [removal](#definitions-and-acronyms-removal quantification which will continue under Method B.
  [/G-4KJ9-0]