[Gasification] Difference between Coal and biomass gasification

[Thomas Koch]

Tom

The temperature in gasifier depends on a number of factors. One of the most important is the lambda value. Some of the Others are the water and ash content.

The reactivity of the fuel (particle size) should be adjusted to the reactor principle and should largely be independent of the density of the fuel – but can to a certain extent be influenced by the porosity.

The ratio between char and volatiles does have an influence on operation on a few very advanced staged gasification principles but for most gasifiers one can not adjust lambda different in the different reaction zones.

Thomas





Fra: Gasification [mailto:gasification-bounces at lists.bioenergylists.org] På vegne af Tom Reed
Sendt: 23. maj 2015 20:17
Til: Discussion of biomass pyrolysis and gasification
Emne: Re: [Gasification] Difference between Coal and biomass gasification

Dear Thomas Koch and ALL:

Thomas asks a very interesting question.  Best answer would be for someone (me?) to get a batch of coal and try it.

First, I would expect that it m i g h t  burn up the gasifier.  Coal burns so much hotter than wood.  But I hope the stainless steel can stand it.

Secondly it would burn twice as long due to the high density of the coal and the high volatile content which could keep it from burning up.

I hope someone will try it and give a report.  I'm on the road, but will try it when I get home if no one else does...

TOM REED

Thomas B Reed
280 Hardwick Rd
Barre, MA 01005
508 353 7841

On May 22, 2015, at 11:51 AM, Thomas Koch <tk at tke.dk<mailto:tk at tke.dk>> wrote:
Hi Saiteja

That depends very much on which principle of gasifier you are using.

If you use an entrained flow gasifier the only real difference is the pretreatment equipment.

Best regards

Thomas Koch



Fra: Gasification [mailto:gasification-bounces at lists.bioenergylists.org] På vegne af Saiteja Chinta
Sendt: 22. maj 2015 20:28
Til: Gasification at bioenergylists.org<mailto:Gasification at bioenergylists.org>
Emne: [Gasification] Difference between Coal and biomass gasification


Hi,

I want to know what would be major design variations while designing for gasifiers which are coal fed from that of biomass.

Thanks
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