The Drive On Wood Library contains articles, plans, research papers and other useful resources on gasification. Enjoy!
What is woodgas anyway? A good explanation from Steve Unruh, followed by Jim Mason's in-depth article.
Your woodgas education starts here. These classics of woodgas literature are referenced all the time by woodgassers. Study well!
Some questions come up over and over again in woodgas discussions. Here's a few of the most frequent.
Aren't you going to use up all the trees? Not at all. Let's take a closer look at the US wood supply.
Here are some of the criteria we use to decide which vehicle to convert to woodgas. It depends a lot on your usage, whether for fast highway traveling or heavy load hauling.
Here's a list of gasifier plans you can download, completely free! Build something simple to get your feet wet or use this as your starting point for a gasifier of your own design.
You say you can weld, sure you can. But are you getting the best quality joints? Is your project full of pinholes? You don't want it to fall apart at the first bump in the road. Check out the best practices for welding your project.
An article explaining the operating principles of the FEMA or stratified downdraft gasifier.
This classic from Tom Reed covers most aspects of a gasification system, and outlines how to design and construct your own system.
Doug Williams of Fluidyne systems has applied many years of experience to this 25th anniversary design.
Here's a simple gasifier from Raymond Rissler. He designed it to burn sawdust. Detailed drawings and descriptions.
Larry Dobson released this gasifier design to the public domain, and it is being used by the Open Source Ecology project.
Wayne Keith has the most efficient gasifier the road today. This test compared running a Dodge Dakota on gasoline, wood, plastic, and chicken litter. They achieved 37% better fuel economy on wood than gasoline!
Basic overview of the classic Imbert designed gasifier. This is still the basis for most gasifier designs.
Dimensions for an inverted V hearth, used in the later Swedish designs.
A good overview of some WWII units, with a modern interpretation at the end.
There were wartime shortages in Australia too... here's a short history of woodgas down under.
After the war, the collective knowledge about gasification was recorded in a few massive works. Gengas, originally written in Swedish, has been translated and republished by the Biomass Energy Foundation.
This gem found by Pete Stanitis covers several of the early WWII systems in detail.
Back at the turn of the century, vehicles running on wood was years away - but producer gas (woodgas) was used for large single piston engines, as well as town gas, before natural gas was discovered.
The first major work by Tom Reed, this work has chapters written by many of the top gasification experts of the day. Very useful reading.
An overview of gasification, fairly comprehensive with several systems detailed.
An in depth manual on operating gasifiers, from the Food and Agriculture Organization, Forestry divison. Excellent reading.
Superficial velocity is basically how "fast" your gasifier is running. Important concept to learn, especially for constricted hearth designs.
Turn down ratio is the difference between full output and minimum output on a gasifier. This has a lot to do with the design of the unit, and a wide ratio is very good for vehicle applications.
Ali Kaupp's original work, republished by the Biomass Energy Foundation. Covers both older and modern (1970's) systems, and a general overview of gasification.
A powerpoint presentation on the decomposition of wood by pyrolysis. The result is bio-oil, a potentially useful product.
The Water-gas shift happens when carbon monoxide and water vapor react to form carbon dioxide and hydrogen. This article discusses the reversal of this effect.
Survey by the Biomass Energy Foundation of the current (2001) gasification scene, various modern projects discussed and "databased".
American Forest & Paper Association
powerpoint, case study
Taylor and NREL/BEF
Woodgas stove design from the Biomass Energy Foundation.
An easy woodgas stove you can make from a tin can.
Here are some links to other woodgas resources.
These are the books we don't have at DOW....
A full section of gasification reference papers from the Indian Institute of Science.
Proposed bill to convert waste biomass to biochar and energy.
Biomass advocate and partner with Wayne Keith.
1983 article on woodgas pioneer Harry LaFontaine. Rare photographs of his system.
Some folks are now using gearboxes from square balers to build wood chunkers. Here's the service manual if you need to rebuild one.