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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The detailed but simple gasificatiln is described and illustrated inSect. Books with such information are listed in the Reference Section see, for example, ReedVol. A schematic diagram of the stratified, downdraft gasifier is shown in Fig. This simple, stratified, downdraft gasifier unit can be constructed from materials that would be widely available in the United States in a prolonged petroleum crisis.

Two-thirds is lost into the environment with the smoke. A simpler filtering system. The gasifier as a whole will run hotter and this means that you have to use materials in the reaction zone that can handle or withstand the hotter core temperatures.

Awesome point glad someone made itthere are going to be a lot of peoples uses and fuel sources that will differ from use to gaxificationand there several types of gasifiers as well Fuel gas, produced by the reduction of sood and peat, was used for heating, as early as in Europe, and by it had been adapted to fuel engines in England.

The chemical reactions and thermochemical conversions which occur inside a wood gas generator are too long and too complicated to gassification covered here.

The goal of this report is to furnish information for building a homemade wood gas generator made out of ordinary, available hardware, in order to get tractors, trucks, and other vehicles operating without delay, if a severe liquid fuel emergency should arise. Let me emphasize again that I believe the base FEMA design can be improved considerably to allow acceptable results in stationary applications.

New Aquaponics Series from Jack Spirko. I have always wanted to have a neighbor just like you – Fred Rogers. During operation of this gasifier, air passes uniformly downward through four zones, hence the name ‘stratified: All internal combustion engines actually run on vapor, not liquid.

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.

The cylindrical shape is easy to fabricate and permits continuous flow of fuel. Wood gas gasidication are not technological marvels that can totally eliminate our current dependence on oil, reduce the impacts of an energy crunch, or produce long-term economic relief from high fossil fuel gaslfication, but they are a proven emergency solution when such fuels become unobtainable in case of war, civil upheaval, or natural disaster.


Most of the volatile components of the fuel are burned in this zone and provide heat for continued pyrolysis reactions. A gasfication generator unit is, simultaneously, an energy converter and a filter.

FEMA Gasifier

I think it’s important to provide this kind of disclaimer whenever the FEMA is introduced, especially gsification those new to the technology. Thousands of gas works all over the world were eventually dismantled.

This is one page of the website that I’ve been looking forward to doing a write-up on. The filtering must be good enough to capture the tar to protect the engine from being gummed up. My line of reasoning is well supported by those with experience, and I woodd all readers to investigate other forums on this topic including driveonwood.

With good charcoal one can generate a clean fuel gas with a steel can and a couple of tubing connections see Gary Gilmore’s work. Because of the wood gasifier’s somewhat low efficiency, the inconvenience of operation, and the potential health risks from toxic fumes, most of such units were abandoned when oil again became available in While it can do reasonably well with very dry fuel of a very regular size, it will make a lot more tar than the Imbert under all conditions.

Thread Boost feature https: The open top permits fuel to be fed more easily and allows easy access. Being an open top air fed design, the fire from the reaction zone can climb straight gasificahion through the fuel and waste it and it can cause the gasifier to run very hot and inefficent.

I don’t want the thread to turn “heated” to discourage people in anyway 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. Due to it’s lower temperature range it is a heavy tar producer. It’s not a bad idea gasifkcation use as an emergency unit when nothing else is available – more important, this is precisely what the system is designed to accomplish emergency, femw nothing more.

The goal of any such mod should be to increase temperatures in the hearth reduction zone in order to improve tar cracking. Gasificatoin documentation of the actual assembly of the ffema, as well as its operational field test, is included in this report.


Library / FEMA Gasifier | Drive On Wood!

If you google “fema gasifier” there will be several documents that should pop up. A closure is only used to preserve the fuel when the engine is stopped.

You can have multiple engines and rebuild kits for less than the cost difference to get to an Imbert. Also, the driest possible fuel should be used, and the fuel should be sized properly to minimize bridging or channeling. One design also took care to insulate the fire tube. However, other fuels such as shredded wood, sawdust, and bark can form a bridge that will prevent continuous flow and cause very high temperatures. The purpose of this design is to get engines gasificatjon quickly for essential functions when only biomass is available as fuel.

I mentioned in a previous post some modifications that might be done. It should be acknowledged that there are alternate technologies such as methane production or use of 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.

Personally, I find the videos rather interesting and chose not to marginalize fwma author’s efforts.

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In diesel engines, the fuel is sprayed into the combustion chamber as fine droplets which burn as they vaporize.

The guidelines must be met to match the Imbert to the engine it will be running to achieve the correct temperatures to crack the tars down into a useful part of the fuel. A prototype gasifier unit was fabricated from these instructions. There is a surprising duration of energy generation and the model can be scaled to meet higher energy requirements. 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.

The inert char and ash, which gasificatoin 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. The foremost question about the operation of the stratified, downdraft gasifier concerns char and ash removal. It can be constructed with the most basic materials on hand. Much lower tar emissions due to it’s design.

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