Re: [Phys-l] ignition point of paper: 451 deg... is it F or C ?

[Bernard Cleyet <bernardcleyet@redshift.com>]

Bryan's reference may contradict my thought that the rate of temp.  
rise strongly affects the ignition temp.   If very slow, pyrolysis  
will result in carbonization and only an extreme temp. will result in  
ignition.

bc, kitchen physicist, piped.


On 2009, Aug 10, , at 11:46, Brian Whatcott wrote:

> Here's another cite: Kinbara used that classic geometry for an
> exothermic reactor - the sphere - in this case, of saw dust.
>  From Session V, see  Kinbara, U Tokyo:  Autoignition of Wood  
> Materials
>
> *http://tinyurl.com/n5tl4b*
>
> Notice his predicted tipping temperature for this configuration.
> (Writing paper has a variable surface filler which may include kaolin
> which alters the ignition point, I wouldn't be surprised to  
> find.....  )
> I'll monitor  a few newsprint shreds in a convenction cooker using
>  a thermocouple, just for fun...
>
> Brian W