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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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. With good charcoal one can gsification a clean fuel gas with a steel can and a couple of tubing connections see Gary Gilmore’s work.

The uppermost zone contains unreacted fuel through which air and oxygen enter. I consider the primary purpose of this forum as a resource for education, and I’m trying to encourage the reader to take the claim seriously.

After the discovery of large petroleum reserves in Pennsylvania inthe entire world changed to oil – a cheaper and more convenient fuel.

Below this zone is the grate. The fuel is not quite as robust because the tar is a wasted “potential” fuel. 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. Such manufactured gas was used for street lights and was piped into houses for heating, lighting, and cooking.

High-grade biomass fuels such as wood blocks or chips will flow down through the gasifier under the influence of gravity, and downdraft air flow. It can be constructed very quickly in the case of an extreme emergency scenario where time is of essence.


The first question many people ask about gasifiers is, ‘Where does the combustible gas come from? This includes Wayne Keith whose work I consider to be extraordinary. Two-thirds is lost into the environment with the smoke. More to the gasificatikn 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.

Much lower tar emissions due to it’s design. Most of the volatile components of the fuel are burned in this zone and provide heat for continued pyrolysis reactions.

Gasification is a method of collecting the smoke and its combustible components.

FEMA Gasifier

In these twin tasks lie its advantages and its difficulties. Also, I express some skepticism that any filtration system will catch all the tar.

The goal of any such mod should be to increase temperatures in the hearth reduction zone in order to improve tar cracking. I would stop short in calling this particular design as “proven” The FEMA gasifier was only meant as a last resort emergency fuel source so it was never intended to be used as a long term fuel source.

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. New Aquaponics Series from Jack Spirko. If you google “fema gasifier” there will be several documents that should pop up.

For prolonged idling, a hand-operated shaker has been included in the design.

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. In short, this design i. Stationary engines can also be fueled by wood gasifiers to run electric generators, pumps, and industrial equipment. As the wood gas burns, the products of combustion are carbon dioxide CO2 and water vapor H2O.


Imbert gasifier vs FEMA gasifier

Being an open top air fed design, the fire from the reaction zone can climb straight up through the fuel and waste it and it can cause the gasifier to run very hot and inefficent. Once I get a chance i will try to make a table, showing the energy potential compared to bio fuels per acre A schematic diagram of the stratified, downdraft gasifier is shown in Fig.

I have to disagree with you on one point and that is this model is a proven design. So, there is some evidence that a few relatively simple modifications to the FEMA can dramatically improve its performance. 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. Due to it’s lower temperature range it is a heavy tar producer. The build is a bit more involved and technical.

In diesel engines, the gasifjcation is sprayed into the combustion chamber as fine droplets which burn as they vaporize. I think it’s important to provide this kind of disclaimer whenever the FEMA is introduced, especially for those new to the technology.

Awesome point glad someone made itthere are going to be a lot of peoples uses and fuel sources that will differ from use woor useand there several types of gasifiers as well If one removes most of the volatiles from wood essentially making charcoal in the processthen gasifier design is not so critical. Thus, the aim of gasification is the almost complete transformation of these constituents into gaseous form so that gasificaation the ashes and inert materials remain.