CO2 emission sources are classified as either stationary, such as industries and power plants, or non-stationary, such as vehicles. Stationary sources are particularly relevant for CCUS projects due to their large emissions and fixed locations, making them ideal for efficient CO2 capture and storage.
Therefore, in alignment with the GIS CCUS Brazil Platform's objectives, the CO2 emission source mapping primarily focuses on stationary sources. The following sectors were considered for the database:
- Energy, including the biofuels production (ethanol, biodiesel, and biomethane), thermoelectric power plants, as well as plants that are part of the Isolated System (not interconnected with the National Interconnected System);
- Hard-to-abate industries, such as refineries, petrochemicals, cement, steel (iron and steel), and fertilizers;
- Other industries, such as metal factories (aluminum and zinc production), food and beverage, and pulp and paper.
CO2 emission source mapping was updated based on Ketzer et al., 2016, using government databases, such as those from the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP) and the Energy Research Office (EPE), along with data released by industrial or producer associations and documents available online.
Emissions quantification from the energy, biofuels, and hard-to-abate sectors used two approaches. The first involved accessing online information in consolidated databases, including the Public Emissions Registry, from the Getúlio Vargas Foundation and Brazil GHG Protocol, and the Climate Trace website. The second approach involved calculating emissions based on production data and specific emission factors for each activity, obtained through the IPCC (2006) and MCTIC (2016).
More detailed information on the specific methodologies adopted for each sector can be found in the methodology document (coming soon).