[Stoves] Stoves Digest, Vol 131, Issue 14

[tmiles at trmiles.com]

Norbert, 

 

I have seen nanoparticle studies from fossil fuels but nothing yet from biomass. Our state (Oregon) assumes that almost all of wood  particulate PM is PM10. I can’t remember the factor for PM2.5 

 

If Jim Jetter, USEPA, is still on the list he would have experience with fine particulate emissions. 

 

Tom

 

From: Stoves <stoves-bounces at lists.bioenergylists.org> On Behalf Of Norbert Senf
Sent: Monday, July 26, 2021 4:20 AM
To: Discussion of biomass <stoves at lists.bioenergylists.org>
Subject: Re: [Stoves] Stoves Digest, Vol 131, Issue 14

 

 

 

 


Message: 1
Date: Sun, 25 Jul 2021 17:49:05 +0100
From: ajheggie at gmail.com <mailto:ajheggie at gmail.com> 

(snip)

 

Hi Andrew:

Some additional observations based on your last comments:

PM 2.5 is a subset of PM 10. Woodsmoke is actually 99% PM 1.0 (or smaller).

Coming onto the scene and not much studied yet are nanoparticles. These don't

have any weight to speak of.

 

Conversion factors for PM were hard to find. I have a rough calculator now in Excel that

has checked out reasonably well.

At 75% efficiency (HHV) and normalized to 13% O2, 

1 g/kg =  85.5 mg/m3 at standard temperature and pressure

=  0.194 lb/MMBtu
= 83.4 mg/MJ 

>From masonry heater observations, flame quenching (lots of air, fire is starting, flames hit cold surface)

gives us soot (elemental carbon) and the smoke is light grey to black

Blue smoke is tar. Like with cigarette smoke (smoldering combustion), the particles are small enough to refract light, which causes the blue color.

Norbert


-- 

Norbert Senf
Masonry Stove Builders
25 Brouse Road, RR 5
Shawville Québec J0X 2Y0
819.647.5092
www.heatkit.com <http://www.heatkit.com> 

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