Impact of size and temperature on the hydrodynamics of chemical looping combustion.

Mahdi Yazdanpanah (1) , Ann Forret (2) , Thierry Gauthier (2)

1 TOTAL S.A.
2 IFPEN - IFP Energies nouvelles

Chemical Looping Combustion (CLC) is conventionally carried out in circulating fluidized bed systems involving various kinds of fluidized beds and solid handling devices. Scale-up of these systems is a research and development challenge associated with various risks and uncertainties. Gas bypassing, poor gas–solid contact and poor performance of solid circulation control devices are among the major considérations in this regard. This paper presents impacts of temperature on the fluidization properties in CLC application. Impacts of temperature on the minimum fluidization velocity and the onset of turbulent regime are studied in various temperatures up to 900 °C. Increase of temperature decreases the minimum fluidization velocity and increases the onset of transition to turbulent regime. Impact of size and temperature on the performance of pneumatic valves (L-valve and loop-seal) are investigated using valves in a range of 2–24 cm in a temperature range of 25–750 °C. Geldart group B particles of 100–300 lm and density of 2600–4750 kg/m3 are used in these experimental tests.

Mots clés: Pneumatic valve; CLC; Chemical looping combustion; Fluidized bed; L-valve; Loop seal

Domaines: Chimie

Mahdi Yazdanpanah, Ann Forret, Thierry Gauthier. Impact of size and temperature on the hydrodynamics of chemical looping combustion.. Applied Energy, 2015, 157, pp.416-421. ⟨hal-01266619⟩