[Stoves] ***SPAM*** Re: ***SPAM*** Carbon credits for briquettes that replace charcoal in Africa

[Crispin Pemberton-Pigott]

Dear Kevin

That figure represents the emission of CO2 and the gases with a CO2 equivalent. It does not represent a net reduction available. Charcoal is made from biomass which is made almost entirely from CO2 originating in the atmosphere.

A carbon credit is available for a documentable permanent reduction in emission of one ton of CO2. It the wood is harvested from a sustainable source there is no credit available because everything harvested is going to regrow. If only a fraction of the harvested biomass grows back (which varies within regions and locales) then a “fraction of non-renewable biomass ” (fNRB) can be calculated from assessment(s).  The available credits are 10 tons x fNRB = n.

If the fNRB value is 5% the answer is 0.5 tons credit per 10 tons of avoided charcoal production.

If you are making briquettes as the alternative, there are two added considerations. One is the energy used to make the briquettes and the other is the efficiency of the substitute fuel. In general charcoal stoves are more efficient than briquette stoves.  The 0.5 ton credit will be factored by methods of Article 6.2 and 6.4 of the Paris Agreement for the lower fuel efficiency of the briquette stove if it is indeed lower. If it is higher, then there is a credit gain.

Under Article 6 many or maybe all countries had their fNRB values reduced considerably. Under CDM many were pretty arbitrary. And high. Not anymore.

Let’s look at the FAO's number:

One dry ton of wood is about 48% carbon, or 480 kg. Traditional charcoal production is ~12%-15% yield these days. It does vary so check because there is a big difference between 8% and 20%. At 15% yield the carbon is ~81% of 15% of 1000 kg. That is 121.5 kg of carbon. The difference between that and 480 was emitted: 385.5 carbon emitted as 1314.5 kg CO2. That's a lot less than 10,000 kg.

They must be counting the PM mass with a large multiplier. I have no idea what numbers they will use for that. Remember they should be using a 100 year calc because it says CO2e.  We can't prove how they got to ten tons.

So all said and done that is how credits are generated.

Best regards
Crispin
________________________________
From: Stoves <stoves-bounces at lists.bioenergylists.org> on behalf of K McLean <kmclean56 at gmail.com>
Sent: Saturday, January 27, 2024 6:07:04 PM
To: Stoves and Biofuels Network <stoves at lists.bioenergylists.org>
Subject: [Stoves] ***SPAM*** Carbon credits for briquettes that replace charcoal in Africa

Is anyone getting these?

FAO<https://www.fao.org/3/i6934e/i6934e.pdf> says that 10 tonnes of CO2e are caused by the production of 1 tonne of charcoal in the typical earthen mound kiln common in Africa.   If this is correct, one tonne of briquettes should fetch 10 carbon credits.

Kevin McLean
Sun24
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