Charcoal quality

[GarethM]

1 minute ago, judastreefairy said:

Bloody hell marra what planet you on, it’s charcoal, I assume if you had a brain cell you’d be dangerous 

Well as reading obviously isn't your strong point, see second sentence.

 

It's was a perfectly valid question, as yes it is carbon its physical structure of an identifiable piece of wood may have turned into proportionally more fines with more cooking.

[GarethM]

13 minutes ago, judastreefairy said:

 

 

Edited February 6 by GarethM

[openspaceman]

3 minutes ago, GarethM said:

I get the fast Vs slow pyrolysis, as that's with added oxygen its effectively a gasification log boiler.

 

But you're charcoal retort keeps the two separate, carbon can't burn without Oxygen.

It is not gasification and no oxygen is added as in gasification.

 

If you consider that instead of wood being a complex mixture of cellulose, hemicellulose, lignin and trace compounds you simplify it to a compound of elements in the ratio C:H1.4:O0.6 then when you add energy they disociate and reform as true gases H2 CO CH4 , I haven't accessible text or inclination to work out the proportions but there is little C left over.

[openspaceman]

6 minutes ago, GarethM said:

 

No need for arguments, I'm happy to explain my understanding but not getting involved with bickering.

[GarethM]

Hence why I was asking, I get the chemistry aspect of it all as it's basically creating a syngas of volatiles.

 

Wasn't sure if the extended cooking caused the carbon to turn more to carbon dust than say a lump.

[openspaceman]

27 minutes ago, GarethM said:

Hence why I was asking, I get the chemistry aspect of it all as it's basically creating a syngas of volatiles.

 

Wasn't sure if the extended cooking caused the carbon to turn more to carbon dust than say a lump.

I prefer the term pyrolysis offgas for what evolves from slow pyrolysis. To me syngas is specifically a mixture of carbon monoxide and hydrogen that is produced by the gasification ( 0.2 stoichiometric air) of carbon (coke). I am not a chemist and I was too stupid to learn chemistry at school, my brother was though and top of his field in carbon.

 

As to extended cooking; I expect once a retort has reached 450°C no matter how long you kept at that temperature not much would change. It's complicated by the feedstock but if the temperature uniformly ramps up to ~300°C the endothermy of drying and torrefying is over, then there is a short exothermic stage when the pyrolysis continues up to 440°C. After this the carbon matrix begins to change, whilst pyrolysis and cracking witin the matrix continues,  and this is likely endothermic.

[judastreefairy]

2 hours ago, GarethM said:

Well as reading obviously isn't your strong point, see second sentence.

 

It's was a perfectly valid question, as yes it is carbon its physical structure of an identifiable piece of wood may have turned into proportionally more fines with more cooking.

Obviously cooking wood isn’t your trade, GavinM

[judastreefairy]

1 hour ago, openspaceman said:

I prefer the term pyrolysis offgas for what evolves from slow pyrolysis. To me syngas is specifically a mixture of carbon monoxide and hydrogen that is produced by the gasification ( 0.2 stoichiometric air) of carbon (coke). I am not a chemist and I was too stupid to learn chemistry at school, my brother was though and top of his field in carbon.

 

As to extended cooking; I expect once a retort has reached 450°C no matter how long you kept at that temperature not much would change. It's complicated by the feedstock but if the temperature uniformly ramps up to ~300°C the endothermy of drying and torrefying is over, then there is a short exothermic stage when the pyrolysis continues up to 440°C. After this the carbon matrix begins to change, whilst pyrolysis and cracking witin the matrix continues,  and this is likely endothermic.

GavinM spaceman will learn ya

[Stubby]

2 hours ago, judastreefairy said:

GavinM spaceman will learn ya

Who is GavinM  ? 🙂

[GarethM]

4 minutes ago, Stubby said:

Who is GavinM  ? 🙂

Jesus probably doesn't even know if Judas stabbed him in the back