[Terrapreta] Fwd: torrified wood vs. charcoal

[Gerald Van Koeverden]

Techno-economic evaluation of torrefaction, fast pyrolysis and  
pelletisation

http://64.233.167.104/search?q=cache:C-i2LE9Mbq0J:www.chem.uu.nl/nws/ 
www/publica/Studentenrapporten/Studentenrapporten2005/I2005-27.pdf+% 
22roasted+wood%22+charcoal&hl=en&ct=clnk&cd=56&client=safari

Begin forwarded message:

> From: Gerald Van Koeverden <vnkvrdn at yahoo.ca>
> Date: February 11, 2008 3:09:18 PM EST (CA)
> To: Terra Preta <terrapreta at bioenergylists.org>
> Subject: torrified wood vs. charcoal
>
> Is torrefied wood going to replace charcoal in our barbecues?  It  
> seems to be both more energy efficient and less polluting...
>
> Gerrit
>
> B: Torrefied Wood, Energy For The Future
> At a global level, renewable energy is of increasing importance  
> because of the greenhouse effect. Emissions from the burning of  
> fossil fuels must be reduced, so alternative fuels are needed.  
> Torrefied wood can be burnt in a conventional coal-fired power  
> station.
> But what is torrefied wood? The word comes from the French ‘bois  
> torréfié’, which means “roasted wood”. This means that the first  
> stage of carbonisation has taken place, without reaching the stage  
> of charcoal.
> Why pre-treat wood in this way, instead of burning it directly, for  
> example in a bioenergy power station? Thanks to roasting, the fuel  
> is better than ordinary biomass. Torrefied wood is wood that has  
> undergone thermal drying and has a relatively high energy potential  
> (20-22 MJ/kg), and is suitable for grinding in coal-grinding mills.  
> It has an excellent combustion rate and low emissions. Moreover it  
> is easy to store, even outdoors, since it is hydrophobic. Transport  
> is relatively cheap.
> Initial tests (phase I of the project) were carried out in 2003 in  
> the Netherlands and Britain.
>
>
> Results were very positive.
> After the positive outcome of phase I, the partners in the project,  
> BGP Ingenieursbureau BV and Stramproy Contracting BV, decided to  
> continue. Phase II is currently in progress. The aim is to produce  
> large quantities of torrefied wood. It is produced in a continuous  
> process plant which can produce a tonne of torrefied wood per hour.
> Many sectors of industry could be interested in this innovation,  
> especially because of the implementation of the Kyoto Protocol,  
> which allows mixed biofuels to be offset against CO2 emissions.
> In future, it is believed that production will reach 10 tonnes an  
> hour. In the meantime additional biomass will be provided by  
> agriculture, the food industry, and forestry.
> Info: H. Kroopman, hkr at bgp.nl - M. Verbeeten, mv at bgp.nl - info at bgp.nl
>
> (MilieuDirect, Belgium, www.kluwer.be/kluwer/home.asp?doelid=3)
>
>
>
> AN FAO paper:
>
> http://www.techtp.com/tw%20papers/fao_paper.htm
>
>
>
>
>

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