[Gasification] Characterization of waste water from biomass gasification equipment: A case-study from Cambodia

Doug Williams doug.williams.nz at gmail.com
Wed Jan 6 14:46:20 CST 2016

Hi Pete,
Another way to answer your question:

The none condensible combustible gas of CO and H2 form in the same way
by reduction and decomposition of water like you say, even though bed
temperatures of these finer packed beds appear lower than conventional
wood gasifiers. At the micro level interstitial space between the
carbon and siliceous ash, very localized high exothermic temperature
exists to make permanent gas (over 850C) but not enough to convert all
the hydrocarbons (usually lumped together as C4's) which will condense
and are caught in the scrubber water. 

It probably is worth mentioning that one fix doesn't suit all, and any
discussion should state specially the fuel type, and or method of
gasification, but cleaning tar gas still requires a reasonably
affordable resolution. 

Hope this was useful.

Doug Williams.

On Mon, 4 Jan 2016 11:15:42 -0600
"Pete & Sheri" <spaco at baldwin-telecom.net> wrote:

> “Crop residues are best gasified at low temperatures. Low temperatures generate tars”
> Does this mean that  a high percentage of the combustable gas is actually hydrocarbons, etc. released by heating the residue, rather than from the reduction of CO and decomposition of water?
> Pete Stanaitis

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