[Gasification] Ash to land? - separated ash fractions

[AJH]

On Fri, 11 May 2007 09:48:11 -0700, Tom Miles wrote:

>In October 2006 I was told they could deliver a system for $3600/kWe
>complete from the fuel bin to genset without the switchgear for the grid.

I wonder how that breaks down? I'll guess more for the gas cleanup
than the gasifier and engine combined.
>
>I assume that is a reasonable cost for supplying power from urban wood under
>a NFFO (Non-Fossil Fuel Obligation) contract which seems to be 7.47 p/kWh
>(Landfill gas) or about USD $0.148/kWh.  

I've never been involved in the financial side of this but I don't
think any of the NFFO gasification projects delivered. By 2006 I think
any that did win contracts would have timed out. After that I think
they would have had to rely on renewable obligation certificates and
other incentives, like carbon credits.

Also the NFFO contracts were more heavily subsidised, I heard figures
around GBP0.15kWhr(e) but I think only conventional steam plants
actually supply the grid from biomass (there is one 15 miles from me
which consumes 300,000tonnes but the fluidised bed and boilers seem
offline a lot).

I don't know your definition of urban wood, most of England is urban
by some definitions, but I don't think any growers obtain a net income
over costs for any wood delivered to a grid supplying power station.
The wood is mostly subsidized by being a result of land clearance for
other reasons.

Someone in UK more in touch with the system ought to be able to
provide a better picture.
AJH