Conversion of SF6 to the alternative cover gas SO2 at RIMA magnesium production
#11of 211 in Brazil#189of 1459 in CDM (UNFCCC)
Audit Analysis
A CDM project replacing SF6 with SO2 as cover gas in magnesium production in Brazil, with VVB-confirmed additionality and a reasonable negligible-leakage justification for a gas-substitution design. Key gaps include the absence of a stated buffer pool, a project-specific (rather than jurisdictional) baseline, and a missing verified ERR figure, which together moderate confidence in the credit's robustness. No material findings or corrective actions were required, and the GWP was updated in a conservative direction.
Red Flags
- Total verified ERR is not found in the extracted record, making it impossible to confirm that claimed reductions were independently verified for the 2021 monitoring period
- Baseline is project-specific rather than jurisdictional or standardised, increasing sensitivity to project-level assumptions
Credit Vintages
| Issued | Retired | Available | ||
|---|---|---|---|---|
| 2011 | 431,555 | 0 | 431,555 | |
| 2012 | 161,478 | 0 | 161,478 | |
| 2013 | 233,673 | 0 | 233,673 | |
| 2015 | 553,467 | 0 | 553,467 | |
| 2016 | 268,647 | 0 | 268,647 | |
| 2017 | 287,283 | 0 | 287,283 | |
| 2018 | 276,416 | 0 | 276,416 | |
| 2019 | 284,184 | 0 | 284,184 | |
| 2020 | 293,888 | 0 | 293,888 | |
| 2021 | 269,600 | 0 | 269,600 | |
| Total | 3,060,191 | 0 | 3,060,191 |
Risk Indicators
VVB-confirmed combined test
mixed evidence / unresolved risk
Negligible with justification (gas substitution)
Project-specific, reassessed 2018
Mentioned but FPIC and grievance mechanism not detailed
CORSIA and CCP status not stated
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