Make gasoline from wood?

crude vegetable oil, diester, bio-ethanol or other biofuels, or fuel of vegetable origin ...
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sam17
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Make gasoline from wood?




by sam17 » 23/02/06, 22:31

While walking on wikipedia I came across an article about Dry Distillation.

Dry distillation consists in heating a solid to purify it or separate its various constituents by producing liquid or gaseous compounds (which can then be resolidified). As the distillation proceeds, the desired product condenses and is collected. This method generally requires higher temperatures than liquid distillation. It can be used to obtain gasoline from coal or wood. It can also be used to break up salts such as sulphates by thermolysis, in this case sulfur dioxide or sulfur trioxide (gas) is produced which can be dissolved in water to produce sulfuric acid. In this way sulfuric acid was initially produced.


Has anyone ever heard of feasible editing to distil wood?

could that give an acceptable energy balance?
It would be a way to warm up while producing one's own essence.

I will do some research on the net, in the meantime, if anyone has any information about it :)



I found a little new since earlier:

In the gasification, the wood is heated to temperatures up to 1000 ° C to give a mixture which contains mainly carbon monoxide and hydrogen (Prahacs, 1971), with as by-products small amounts of ethylene, acetylene, propylene, benzene and toluene. The carbon monoxide and hydrogen formed may be, as in the gasification of coal, (a) reprocessed to provide hydrogen for the production of ammonia, (b) catalytically converted to methanol, ( c) hydrogen enriched and combined to form methane, or (d) catalytically converted to a mixture of aliphatic hydrocarbons by the Fischer-Tropsch process.


The wood can be liquefied by reaction with carbon monoxide and water at a temperature of 350 - 400 ° C and under a pressure of 275 bars in the presence of various catalysts (Appel, 1971). At a yield of 40 - 50 percent, a viscous oil is obtained which can then be converted into chemicals in the same way that crude oil is processed into petrochemicals.


Pyrolysis, or decomposition of wood under the action of heat in the absence of air or oxygen, converts wood into charcoal, gas, and oil (Soltes, 1978, Wender, 1974). The relative yield of the various products depends on the conditions of the pyrolysis and the composition of the treated material; the normal figures are 900 ° C 25-35 percent charcoal, 30-45 percent gas, and up to 8 percent tar and oil. The gas consists mainly of hydrogen, carbon monoxide and methane, while the tar and oil contain light hydrocarbons such as benzene and toluene, as well as mixtures of compounds with higher boiling point

Coal and wood are possible substitutes for oil as raw material for the chemical industry for the future. The choice of each country will obviously depend on which of these products it has, but only wood is a renewable resource


Shafizadeh (1978) has shown that the dry distillation of cellulose at 400 - 500 ° C yields about 80 per cent of a tar which contains mainly levoglucosan and can be converted to glucose with a yield of 50 per cent compared to cellulose. It is necessary to have a cellulose free of other constituents of the cell wall, in order to avoid contamination and reactions with other decomposition products.

The conversion of cellulose to glucose is the first step in its widespread use in the chemical industry. The most important potential outlet is the fermentation of glucose into ethanol, using proven high efficiency industrial techniques. Ethanol or ethyl alcohol is an important industrial chemical, now obtained by hydration of ethylene. It could also have a wide use as a fuel for internal combustion engines.

The dehydration of ethanol to ethylene, the reverse reaction of that which currently makes it possible to obtain ethanol from ethylene extracted from petroleum, is also done with a high yield. Similarly, butadiene can be readily obtained from ethanol by industrially proven but obsolete processes due to low oil prices. The conversion of glucose to ethylene and butadiene, via ethanol, represents the greatest potential use of cellulose in the chemical industry, due to the importance of ethylene,


all this comes from this page: http://www.fao.org/documents/show_cdr.a ... 525f01.htm
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