Carbo Consult:Tar Free Wood Gas
Gero Eckerman November 13,2006

From Tom Reed:

I was a good friend and colleague of Gus and visited his house several times.

It is important to speak the same language. What is the tar content of your raw gas? Filtered Gas? Particulate content?

Congratulations on all of your installations. I didn't find your attachment about prices etc. Please send again...
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Dear Tom,

Many thanks for your mail!

Yes, I agree with you and the importance to speak the same language. Gus used to say: “for all intents and purposes, our gas is tar free”. I prefer to call it just “tar free”, because our CSIR tested and certified gas (this was done for ESKOM in April 2000) only contains 0,002g / Nm³ particulates and max 0,012g / Nm³ tar-like compounds. This presents a total of max 0,014g / Nm³ “impurities” and is still considered by others as absolutely negligible.

By the way, NO TAR refers to our raw gas and the filtered gas, because the tar gets cracked in the hearth of the gasifier (at ±1,500ºC).

I had similar questions from Tom Miles on 10 Nov and forwarded the answers to him today. Both, our prices and said answers are attached hereto.

With kind “Biomass Energy” regards,

Gero