[Terrapreta] value of carbon credits

[Greg and April]

Gerald,

Don't forget the cost collecting the biomass and charring it in the first place.

On another note - I have never heard of farmers applying perlite, vermiculite or peat moss wholesale to their fields - have you?

Greg H.

  ----- Original Message ----- 
  From: Gerald Van Koeverden 
  To: Terra Preta 
  Sent: Tuesday, April 15, 2008 1:06
  Subject: [Terrapreta] value of carbon credits


  If the sequestering of char became accepted for carbon credits, how much would the carbon credit have to be to justify the cost of doing so?  


  Using Folke's formula, modified by Sean's factor of 90%:


  Burying 1 kg of Carbon is equivalent to sequestering 3.7 kg CO2.  Since 1.1 kg of char has 1 kg of carbon, one ton of char would be the equivalent to 3700/1.1= 3,400 kg. of CO2.

  From previous discussions, we've heard that a ton of char should be worth $200 - roughly the equivalent of that of charcoal.  

  Thus, if one expects carbon credits to pay the full cost of the char (ignoring shipping and application costs), then the credits have to be approx. (200/3.4=) $60/ton of CO2.

  If one is going to promote putting char on farmer's fields, the credits will have to be close to this, especially since there are still trucking and application costs to be considered.
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