Advantages And Disadvantages Of Co2 Sequestration

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The sun energy is continuously bombarded on earth. Some amount of energy is absorbed by ocean and control oceanic currents and weather but some energy by the process of photosynthesis enters into biological system (Rabinowitch, 1961; Whitaker and Likens, 1975).
Due to industrialization, the release of greenhouse gases into atmosphere cause an increase in carbon dioxide concentration by 280 parts per million in 1750 and 390 ppm in 2010 (Kumar et al.2011). Mainly theindustries of plastics, paint, solvents, packaging and cleaning compounds utilizes the carbon. According to Mauna loa observatory in Hawaii, shows the seasonal and annual changes in carbon concentrations since 1958 by keeling curve. This curve shows that the carbon dioxide concentration
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The CO2 sequestration technologies can be divided into physical and biological strategies. . One physical method to capture CO2 is in deep oceans, gas wells and aquifers. Physical CO2 sequestration has some disadvantages of high cost and capturing and storage is also very expensive process. Another method is chemical sorption of CO2power plants. Plants can naturally capture the carbon dioxide and use it for photosynthesis by biological fixation. Terrestrial plants capture more amount of carbon dioxide but the actual atmospheric carbon dioxide is just 0.036%, so it is not economical valuable method. Another alternative Biological method is CO2 sequestration by using algae. It has some advantages over physical methods of sequestration. Microalgae is very efficient to C 4 plants for photosynthesis. The proliferation rate of algae is also high and has potential foe intensive cultures. Algae can capture the CO2 so reduce global warming and it can be used for production of biofuels and some other secondary metabolites such as biodiesel, bioethanol, bio hydrogenetc. (Loubiere 2009). 1 kg of algae can utilizes 1.83 kg of carbon (Brennan and owende, 2010). The problems with algae are the temperature of flue gases is high and presence of impurities like NOx, SOx and other impurities of fossil fuels. Changes in temperature and presence of light and other seasonal variation are the major problems in open systems (Brennan and Owende, 2010). In a closed system the there is a control on the parameters and conditions that influence the culture (Carvalho et. al.,
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