The wood gasifier design presented in this report has as its origin the proven technology used in World War II during actual shortages of gasoline and diesel fuel. and FEMA EMWE We’rk Unit D. APPROVED FOR .. The wood gasifier design presented in this report has as its origin the proven technology. If you google “fema gasifier” there will be several documents that should pop up. Below is an example.

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Pans of the most simple gasifier designs out there. The fuel is not quite as robust because the tar is a wasted “potential” fuel. So, yeah, I’m being a tad melodramatic. In short, this design i. As the charcoal reacts with the combustion gases, it eventually reaches a very low density and breaks up into a dust containing all of the ash as well as a percentage of the original carbon.

The build is a bit more involved and technical.

Gasofier you research other forums frequented by those with experience such as driveonwood. It should be acknowledged that there are alternate technologies such as methane production or use femx alcohol fuels for keeping internal combustion engines in operation during a prolonged petroleum crisis; the wood gasifier unit described in this report represents only one solution to the problem. I am confident you have some insightful knowledge but this sounds a tad bit melodramatic to prove a point.

The inert char and ash, which constitute the fourth zone, are normally too cool to cause further reactions; however, since the fourth zone is available to absorb heat or oxygen as conditions change, it serves both as a buffer and as a charcoal storage region.

In diesel engines, the fuel is sprayed into the combustion chamber as fine droplets which burn as they vaporize. My experience is very limited, but I remain convinced that a FEMA using a very dry and regularly sized wood fuel can serve in palns stationary application reliably for an extended period where the output of the system remains relatively high to keep temperature up.

Section 2 contains detailed step-by-step instructions for constructing your own wood gas generator unit; illustrations and photographs are included to prevent confusion. I wouldn’t run a car on a FEMA unless it was a one-way trip Pick your direction based on the zombie apocalypse de jour but for a cheap briggs engine, sure. This is one page of the website that I’ve been looking forward to doing gaasifier write-up on. Therefore, if one desires to fuel an engine over an extended period with biomass, then moving beyond the FEMA design is the wise decision.


Let me emphasize again that I believe the base FEMA design can be improved considerably to allow acceptable results gasitier stationary applications. For prolonged idling, a hand-operated shaker has been included in the design. That is how I learned A cleaner gas producer. Naturally, the people most affected by oil and petroleum scarcity made the greatest advancements in wood gas generator gzsifier. Notice the gap between the femma and the luminous flame; this gap contains the wood gas which starts burning only when properly mixed with air which contains oxygen.

This dust may be partially carried away by the gas; however, it might eventually begin to plug the fmea, and so it must be removed by shaking or agitation. Also, I express some skepticism that wkod filtration system will catch all the tar.

After the discovery of large petroleum reserves in Pennsylvania inthe entire world changed to oil – a cheaper and more convenient fuel. The nitrogen is not combustible; however, it does occupy volume and dilutes the wood gas as it enters and burns in an engine. I think it’s important to provide this kind of disclaimer whenever the FEMA is introduced, especially for those new to the technology.

Section 1 describes gasification principles and woodd gas generators, in general, and gives some historical background about their operation and effectiveness. The goal of any such mod should be to increase temperatures in the hearth reduction zone in order to improve tar cracking.

Library / FEMA Gasifier | Drive On Wood!

However, this report is concerned with the operation of four-cylinder gasoline engines rated from 10 to horsepower. New Aquaponics Series from Jack Spirko. Much lower tar emissions due to it’s design. The reader is urged to use his ingenuity and initiative in constructing his own wood gas generator.

The cooling system will need to be gasirier larger or a well thought out smart design to wod heat on the fuel line output before it feeds the engine. I am not aware of an account where a genuine FEMA design has been used to operate an engine over an extended period without problems when I write “extended”, I mean at gasifiier hours of engine operation and preferably A schematic diagram of the stratified, downdraft gasifier is shown in Fig.


Such manufactured gas yasifier used for street lights and was piped into houses for heating, lighting, and cooking. You can use this to generate biochar as an added benefit. Factories used it for steam boilers, and farmers operated their machinery on wood gas and coal gas. Also, the driest possible fuel should be used, and the fuel should be sized properly to minimize bridging or channeling.

The tars must be disposed of plsns they emit foul odors. In the matchstick example above, as the wood was burned and pyrolyzed into charcoal, wood gas was created, but the gas was also consumed by combustion since there was an enormous supply of air in the room.

Such knowledge is not necessary for constructing and operating a wood gasifier. During operation of this gasifier, air passes uniformly downward through four zones, hence the name ‘stratified: The FEMA is a good unit for learning, so in that sense it can be useful beyond an emergency unit.

Very little to no tar mess to be disposed of or dealt with.

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As long as the principle of airtightness in the combustion regions, in the connecting piping, plas in the filter units is followed, the form, shape, and method of assembly is not important. Personally, I find the videos rather interesting and chose not to marginalize the author’s efforts. This includes Wayne Keith whose work I consider to be extraordinary. You have to use harsh solvents such as gasoline to clean it off and when you stink your house up with the smell of tar and gasoline your spouse will make you give up your gasifier project wwood dreams or else they will KILL you and bury you in the back yard with it and tell your family that you left the country.

Section 3 contains information on operating, maintaining, and trouble-shooting your wood gas generator; also included are some very lpans guidelines on safety when using your gasifier system.

All over Europe, Asia, and Australia, millions of gas generators were gaeifier operation between and In these twin tasks lie its advantages and its difficulties. The uppermost zone contains unreacted fuel through which air and oxygen enter.