Production and Stability Assessment of Oxygen Carrier Produced By Sewage Sludge Fluidized Bed Combustion

CO2 concentration has increased significantly after the industrial revolution owing to the anthropic emissions caused by the use of fossil fuels. This has been determined by an increase in the greenhouse effect and, consequently, the rising of the temperature of the earth’s surface which is known as “global warming”. In this scenario, the development of renewable energies, the energy consumption reducing, and the energy efficiency optimization, represents a valid and definitive middle-long term solution to preserve our planet. Despite many renewable technologies reached a good level of maturity from both technical and economical point of view, these suffer of some limitations which still make our society fossil fuel-dependent. These limitations are represented by the intrinsic intermittent nature of the renewable systems and by the inability to fulfil the total energy demand; this entails that the fossil sources will be predominant for many decades. The Carbon Capture and Storage (CCS) or Utilization (CCU) technologies represent a collection of several processes for an eco-friendly employment of the fossil fuels. Among the CO2 capture techniques, the Chemical Looping Combustion (CLC) is one of the most promising technology, which allows to burn fuels without direct contact between fuel and oxygen in the air.