3.3 Limitations and exclusions

Best endeavours have been used to secure, verify and organise the data collected in the global survey of CCS projects. Numerous primary and secondary data sources have been used to collect and validate the data. However, despite these best endeavours, the database may have some limitations and exclusions arising from a range of factors beyond the authors influence. The limitations are listed below.

  • The timeframe in which the Consortium had to gather and validate the project data was limited to four months.
  • The Consortium was reliant on the good will of project proponents and other key stakeholders to provide timely, accurate and complete responses.
  • Some project proponents/stakeholders chose not to participate in the activity at this time.
  • Certain data sets have been specifically withheld at the request of the project proponent.
  • Some data may have been recorded incorrectly when it was translated into English.
  • Significant challenges were encountered in establishing a globally harmonised metric to define what a “large-scale CCS project” meant.

A detailed list of the limitations and exclusions is included in Report One.

Despite these limitations and exclusions, the authors believe that the data set is robust. For example, when proponents of large-scale integrated projects chose not to be part of the survey, publicly available data has been sourced from the internet or secondary sources such as published literature. The data has also been checked on numerous occasions by the regional teams that collected the primary information to overcome any language issues as part of the quality control process.

Given the possible limitations and exclusions, the authors recognise that while the creation of the CCS project database is a significant step forward, it is but one step in an ongoing process. It provides a robust and rigorous platform upon which new CCS project information can be added, or existing information refined, by the Global CCS Institute going forward.