Tuesday, 30 June 2009

European Biomass Conference and Exhibition, Hamburg

Expert workshop: 

High cofiring percentages in new coal fired power plants

Chairperson: Sjaak van Loo

organised by IEA Bioenergy Task 32

The interest in biomass cofiring is growing rapidly as countries recognize this as an option to rapidly introduce very large amounts of renewable electricity at low costs, however the options to cofire in existing power plants are limited. For new coal fired power plants that are now on the drawing table it is a challenge to include maximum cofiring abilities in the design. This in combination with very high steam conditions (over 700 C of steam) and the capability to capture CO2. The main issues are ash related.
 

This workshop presented some new concepts for coal fired power plants that can handle much larger percentages of biomass cofiring, e.g. using fluid bed combustion, pre-gasification or parallel combustion, but also other pulverized coal concepts may do this when properly designed. Evidently this relates to much more than just combustion but also includes gasification, torrefaction, and even other processes.

The full report with a summary of all presentations can be downloaded here.
 

Individual presentations:

15:00

Opening
Sjaak van Loo, IEA Bioenergy Task 32

15:10

Amager #1
Tina Kristensen, Vattenfall

15:35

Torrefaction
Ewout Maaskant, Topell

16:00

Fluid bed combustion and gasification
Edward Pfeiffer, KEMA

16:25

COFFEE BREAK

16:45

Ash related topics in high percentage cofiring
Jaap Kiel, ECN

17:10

Direct cofiring
Bill Livingston, Doosan Babcock

17:35

Discussion

17:45

Closing