Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Wood Gas shopping experience:
1. Compare - without doubt the biggest advantage that the Wood Gas offers shoppers today is the ability to compare thousands of Wood Gas at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Wood Gas? Wrong! If the Wood Gas is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Wood Gas then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Wood Gas? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Wood Gas and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Wood Gas wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Wood Gas then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Wood Gas site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Wood Gas, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Wood Gas, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
on a Ford truck converted to a tractor (an
EPA tractor).
Wood gas, also known as
holzgas,
air gas or
blue gas, is the product of thermal gasification of
biomass or other carbon containing materials such as coal in a gasifier or
wood gas generator. It is the result of a high temperature reaction (>700 °C), where carbon reacts with steam or a limited amount of air or oxygen producing carbon monoxide (CO), molecular hydrogen (H2), and carbon dioxide (CO2).
In several gasifiers the actual gasification process is preceded by pyrolysis, where the biomass or coal turns into char releasing
polycyclic aromatic hydrocarbon (PAH) rich
tar and
methane (CH4). Other gasifiers are fed with previously pyrolysed char. Wood gas is flammable because of the carbon monoxide, hydrogen and methane content.
Usage
Wood gas can be used to power cars with ordinary internal combustion engines if a
Wood gas generator is attached. This was quite popular during World War II in several European countries because the armies active in the war did not always have access to oil. In more recent times, wood gas has been suggested as a clean and efficient method to heat and cook in developing countries, or even to produce electricity when combined with a gas turbine or internal combustion engine. Compared to the WWII technology, gasifiers have become less dependent on constant attention due to the use of sophisticated electronic control systems, but it remains difficult to get clean gas from them. Purification of the gas and feeding it into the natural gas pipelines is one variant to link it to existing refuelling infrastructure, liquification by the Fischer-Tropsch process is the other possibility.
Production
Burgenland Austria operated on wood chipsA wood gasifier takes wood chips, sawdust, charcoal, coal, rubber or similar materials as fuel and burns these incompletely in a fire box, producing solid ashes and soot (which have to be removed periodically from the gasifier and constantly from the gas) and wood gas. The wood gas can then be filtered for tars and soot/ash particles, cooled and directed to e.g. an
internal combustion engine, gas turbine, Stirling engine or fuel cell to produce electricity. Most of these devices have severe requirements to the purity of the wood gas, so the gas often has to pass through extensive gas cleaning in order to remove or convert (i.e. to "crack") tars and particles. If you plan to run wood gas in an internal combustion engine, get to know your local cylinder head repair shops.
The heat of combustion of producer gas is rather low compared to other fuels. Taylor reports that “producer gas” has a lower heating value of 5.7 MJ/kg versus 55.9 MJ/kg for natural gas and 44.1 MJ/kg for gasoline. Presumably, these values can vary somewhat from sample to sample. The same source reports the following chemical composition by volume which most likely is also variable: 1981.
- Nitrogen N2 50.9%,
- Carbon monoxide CO 27.0%,
- Hydrogen H2 14.0%,
- Carbon dioxide CO2 4.5%,
- Methane CH4 3.0%,
- Oxygen O2 0.6%.
The quality of the gas from different gasifier varies a great deal. Staged gasifiers, where pyrolysis and gasification occur separately (instead of in the same reaction zone as was the case in e.g. the WWII gasifiers) can be engineered to produce essentially tar-free gas (
on a Ford truck converted to a tractor (an
EPA tractor).
Wood gas, also known as
holzgas,
air gas or
blue gas, is the product of thermal gasification of biomass or other carbon containing materials such as
coal in a gasifier or wood gas generator. It is the result of a high temperature reaction (>700 °C), where carbon reacts with steam or a limited amount of air or oxygen producing carbon monoxide (CO), molecular hydrogen (H2), and
carbon dioxide (CO2).
In several gasifiers the actual gasification process is preceded by
pyrolysis, where the biomass or coal turns into char releasing polycyclic aromatic hydrocarbon (PAH) rich
tar and
methane (CH4). Other gasifiers are fed with previously pyrolysed char. Wood gas is flammable because of the carbon monoxide, hydrogen and methane content.
Usage
Wood gas can be used to power cars with ordinary
internal combustion engines if a Wood gas generator is attached. This was quite popular during World War II in several European countries because the armies active in the war did not always have access to oil. In more recent times, wood gas has been suggested as a clean and efficient method to heat and cook in developing countries, or even to produce electricity when combined with a gas turbine or internal combustion engine. Compared to the WWII technology, gasifiers have become less dependent on constant attention due to the use of sophisticated electronic control systems, but it remains difficult to get clean gas from them. Purification of the gas and feeding it into the natural gas pipelines is one variant to link it to existing refuelling infrastructure, liquification by the
Fischer-Tropsch process is the other possibility.
Production
Burgenland Austria operated on wood chipsA wood gasifier takes wood chips, sawdust, charcoal, coal, rubber or similar materials as fuel and burns these incompletely in a fire box, producing solid ashes and soot (which have to be removed periodically from the gasifier and constantly from the gas) and wood gas. The wood gas can then be filtered for tars and soot/ash particles, cooled and directed to e.g. an internal combustion engine, gas turbine,
Stirling engine or
fuel cell to produce electricity. Most of these devices have severe requirements to the purity of the wood gas, so the gas often has to pass through extensive gas cleaning in order to remove or convert (i.e. to "crack") tars and particles. If you plan to run wood gas in an internal combustion engine, get to know your local cylinder head repair shops.
The heat of combustion of producer gas is rather low compared to other fuels. Taylor reports that “producer gas” has a lower heating value of 5.7 MJ/kg versus 55.9 MJ/kg for natural gas and 44.1 MJ/kg for gasoline. Presumably, these values can vary somewhat from sample to sample. The same source reports the following chemical composition by volume which most likely is also variable: 1981.
- Nitrogen N2 50.9%,
- Carbon monoxide CO 27.0%,
- Hydrogen H2 14.0%,
- Carbon dioxide CO2 4.5%,
- Methane CH4 3.0%,
- Oxygen O2 0.6%.
The quality of the gas from different gasifier varies a great deal. Staged gasifiers, where pyrolysis and gasification occur separately (instead of in the same reaction zone as was the case in e.g. the WWII gasifiers) can be engineered to produce essentially tar-free gas (
Wood gas - Wikipedia, the free encyclopedia
Wood gas, also known as holzgas, air gas or blue gas, is the product of thermal gasification of biomass or other carbon containing materials such as coal in a gasifier or wood gas ...
Wood gas generator - Wikipedia, the free encyclopedia
A wood gas generator is a wood-fueled gasification reactor mounted on an internal combustion engine, to provide a wood gas, a form of syngas. These devices are also known as gas ...
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