This website is dedicated to the construction of wood gasifiers that can be used to run a gasoline engine with. Woodgas has been around for a long time and it. and FEMA EMWE We’rk Unit D. APPROVED FOR . implified version of the World War II, Imbert wood gas generator. This simple, stratified. If you google “fema gasifier” there will be several documents that should pop up. Below is an example.

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Smoke and gas vented into the atmosphere while new wood was being loaded; the operator bad to be careful not to breathe the unpleasant smoke and toxic fumes. This region serves the same function as the fuel hopper in the Imbert design. 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 least hours of engine operation and preferably These instructions have been prepared as a manual for use by any mechanic who is wooc proficient in metal fabrication or engine repair.

Thread Boost feature https: Gasification is a method of collecting the smoke and its combustible components. The chemical reactions and thermochemical conversions which occur inside gasigication wood gas generator gasifictaion too long and too complicated to be covered here.

Much lower tar emissions due to it’s design.

Detailed, step-by-step procedures are presented in this report for constructing a simplified version of the World War II, Imbert wood gas generator. The problem with this is that an engine powered by such a unit will require a lot of regular maintenance.

FEMA Gasifier

If the tars get on your hands or your clothes or tools you cannot use soap and water to wash it woid. This unit was then mounted onto the front of a gasoline-engine farm tractor and successfully field tested, using wood chips as the only fuel; see Fig.

Once I get a chance i will try to make a table, showing the energy potential compared to bio fuels per acre Bridging can be prevented by stirring, shaking, or by agitating the grate or by having it agitated by the vehicle’s movement. All of these solid fuels are composed primarily of carbon with varying amounts of hydrogen, oxygen, and impurities, such as sulphur, ash, and moisture.


Both the Imbert gasifiers and the stratified concept have a provision for shaking the grate; when they are used to power vehicles, they are automatically shaken by the vehicle’s motion. Let me emphasize again that I believe the base FEMA design can be improved considerably to allow acceptable results in stationary applications.

A cleaner gas producer. All internal combustion engines actually run on vapor, not liquid. Awesome point glad someone made itthere are going to be a lot of peoples uses and fuel sources that will differ from use to useand there several types of gasifiers as well Therefore, in any case I expect a FEMA design to introduce tar into an engine at a rate many times higher than an Imbert all else equal.

The presence of char and ash serves to protect the grate from excessive temperatures. The nitrogen is not combustible; however, it does occupy volume and dilutes the wood gas as it enters and burns in an engine.

The use of wood to provide heat is as old as mankind; but by burning the wood we only utilize about one-third of its energy. Personally, I find the videos rather interesting and chose not to marginalize the author’s efforts.

One design also took care to insulate the fire tube.

This simplified design employs a balanced, negative-pressure concept in which the old type of sealed fuel hopper is no longer necessary. In the second zone, the wood fuel reacts with oxygen during pyrolysis. The liquid fuels used in gasoline engines are vaporized before they enter the combustion chamber above the pistons. For example, the body of the unit consists of a galvanized metal garbage can atop a small metal drum; common plumbing fittings throughout; and a large, stainless steel mixing bowl for the grate.

It is an emergency unit, and should be used as nothing more. The FEMA gasifier was only meant as a last resort emergency fuel source so it was never intended to be fena as a long term fuel source.


FEMA wood gasifier demonstration and DIY specifications (biogas forum at permies)

The tars must be disposed of and they emit foul odors. All over Europe, Asia, and Australia, millions of gas generators were in operation between and I have always wanted to have a neighbor just like you – Fred Rogers. A schematic diagram of the stratified, downdraft gasifier is shown in Fig.

Adding additional insulation can further raise temperatures there which is wopd for tar reduction. More to the point and my intention, I think it is polite to give credit to the person in the video who constructed a polished prototype and in my opinion presented the design very clearly.

Below this zone is the grate. It should be acknowledged that there are alternate technologies such as methane production or use of alcohol wiod for keeping internal combustion engines in operation during a prolonged petroleum crisis; the wood gasifier unit described in this report represents only gasiifcation solution to the problem. Except for the technology of producing alternate fuels, such as methane or alcohol, the only solution for operating existing internal combustion engines, when oil and petroleum products are not available, has been these simple, inexpensive gasifier units.

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In fact, many people can recall a widespread use of wood gas generators during World War II, when petroleum products were not available for the civilian populations in many countries. However, other fuels such as shredded wood, sawdust, and bark can gasificaton a bridge that will prevent continuous flow and cause very high temperatures. The fuel is not quite as robust because the tar is a wasted “potential” fuel.