Trends on CO 2 Capture with Microalgae: A Bibliometric Analysis.

The alarming levels of carbon dioxide (CO 2 ) are an environmental problem that affects the economic growth of the world. CO 2 emissions represent penalties and restrictions due to the high carbon footprint. Therefore, sustainable strategies are required to reduce the negative impact that occurs. Among the potential systems for CO 2 capture are microalgae. These are defined as photosynthetic microorganisms that use CO 2 and sunlight to obtain oxygen (O 2 ) and generate value-added products such as biofuels, among others. Despite the advantages that microalgae may present, there are still technical-economic challenges that limit industrial-scale commercialization and the use of biomass in the production of added-value compounds. Therefore, this study reviews the current state of research on CO 2 capture with microalgae, for which bibliometric analysis was used to establish the trends of the subject in terms of scientometric parameters. Technological advances in the use of microalgal biomass were also identified. Additionally, it was possible to establish the different cooperation networks between countries, which showed interactions in the search to reduce CO 2 concentrations through microalgae.