[Gasification] Need help from gasifier experts_Clinker formation

[Thomas Koch]

Dear Prasad

Thank you for a very clear pinpointing of the fundamental problem of “inventory bed” gasification technology.

If you have tars you have problems that are almost impossible to handle with in the economy a gasifier can expext to operate with in.

If you reduce the temperature you get more tars and a high char loss.

If you raise the temperature the tar problem reduces you reduce the char loss and increase the loss as latent heat in the gas - and you get klinker.

Staged gasification – Viking – Double feuer – NOTAR – TKE – Wamsler and a number other designs have managed to reduce the tar content in the gas considerably – for some close to zero – but they are all facing high temperature engineering challenges and none have proven real reliably operation for many thousand hours.
The challenges of all these constructions are the complex design and therefor the cost – both for building and operation.

Best regards

Thomas










Fra: gasification-bounces at lists.bioenergylists.org [mailto:gasification-bounces at lists.bioenergylists.org] På vegne af Prasad Mande
Sendt: 24. juli 2012 08:42
Til: Discussion of biomass pyrolysis and gasification; tombreed2010 at gmail.com
Emne: Re: [Gasification] Need help from gasifier experts_Clinker formation

Dear gasifier experts,
I was working on the biomass pellet trial on one of the wood chip gasifier (Gasifier design is IISc India design- Open top downndraft). I found that gasifier was able to make good quality gas when switched from wood chips to these biomass pellets. However, two major problems I came across are TAR and Clinkers. Clinkers are primarily due to the temperature in the reactor bed which is exceeding probably ash fusion temperatures for the biomass pellets I used. I want to know from you the ways to control this reactor bed temperature inside gasifier, such that I can avoid clinker formation and also reduce the temperature

Waiting for the guidance from experts.

From: gasification-bounces at lists.bioenergylists.org<mailto:gasification-bounces at lists.bioenergylists.org> [mailto:gasification-bounces at lists.bioenergylists.org]<mailto:[mailto:gasification-bounces at lists.bioenergylists.org]> On Behalf Of A.Saravanakumar
Sent: Tuesday, July 24, 2012 11:00 AM
To: tombreed2010 at gmail.com<mailto:tombreed2010 at gmail.com>; gasification at lists.bioenergylists.org<mailto:gasification at lists.bioenergylists.org>
Subject: Re: [Gasification] Flaming pyrolysis modelling for truncated updraft gasifier


Dear Booster,



Warm Greetings,

You are my GAS GURU and inspiration to us.



I pray for your early recovery from the fall.



I kindly request you to see through the paper and make necessary corrections in this paper in the aspect of Elsevier publications.



Please check the manuscript for grammatical errors and instances of badly worded/constructed sentences and refine the language carefully.



I kindly request you to correct the paper, which I have sent for your kind perusal.



Thanking you



Yours faithfully



A. Saravanakumar



On Sat, 21 Jul 2012 01:51:39 +0530  Tombreed wrote:

>  Dear Sara

The paper was not attached...

Tom Reed

Thomas B Reed



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