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SUMMARY:Chemical Looping Combustion: A Technology for the Clean Utilisatio
 n of Coal - Professor John Dennis
DTSTART:20140121T174500Z
DTEND:20140121T193000Z
UID:TALK50386@talks.cam.ac.uk
CONTACT:21255
DESCRIPTION:Coal is used for around 39% of global production of electricit
 y. Despite being one of the most polluting fossil fuels\, in terms of mass
  of CO2 emitted per unit of power generated\, the use of coal is projected
  to increase from present day levels by ~ 80% by 2030. It is\, therefore\,
  important to find ways of using it for power generation whilst avoiding t
 he release of CO2 into the atmosphere. The currently-available technology 
 for CO2 separation is by scrubbing the flue gases with\, e.g. monoethylami
 ne (MEA): however\, this technique comes with a large energy penalty becau
 se of the large heat requirement for regeneration of the solvent\, reducin
 g the efficiency of the power plant by up to one-third. \nThis presentatio
 n will survey\, briefly\, current methods for separating CO2. It will then
  present some research being conducted at Cambridge on Chemical-looping co
 mbustion (CLC)\, which has the inherent property of separating CO2 from fl
 ue gases without the energy penalty associated with amine scrubbing. Inste
 ad of air\, it uses an oxygen-carrier\, usually in the form of a metal oxi
 de\, to provide oxygen for combustion. If time permits\, further work on a
  modification of chemical looping will be described\, involving the oxides
  of iron in packed bed reactors\, to produce hydrogen of high purity from 
 low-grade synthesis gas. This offers substantial benefits in terms of the 
 distributed production of hydrogen\, avoiding costly transport of the gas 
 by a dedicated grid.
LOCATION:Winstanley Lecture Theatre
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