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Michael Black

Jan 1, 1970
0
1)what are the chemical reactions for the combustion of
octane( assuming that the gasoline is octane)?


2)

Why are you asking a chemical question in a newsgroup about electronics?

At least you caught yourself before posting the second homework question.

Michael
 
L

Lord Garth

Jan 1, 1970
0
1)what are the chemical reactions for the combustion of
octane( assuming that the gasoline is octane)?


2)

Complete combustion results in CO2+H2O but then again nothing is perfect.
 
C

cdd

Jan 1, 1970
0
Complete combustion results in CO2+H2O but then again nothing is perfect.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

CDD- Yes this is the wrong place for this Question But as for the
above answer
complete combustion of a hydrocarbon does not give H2O as an
end
product more like if motor is running rich -high carbonmonoxide-CO
output-- proper fuel mixture
means an increase in CO2 output -octane is not gasoline it is an
aditive used to stop
preignition. without it your engine would try to diesel when hot or
when a high compression
engine is used.Although this doesn't answer your question I have
trouble understanding what it is you want to
know. did you need to know the exact chemical/thermal and explosive
reaction of an internal combution engine or
???????????????????????
 
S

sparky

Jan 1, 1970
0
1)what are the chemical reactions for the combustion of
octane( assuming that the gasoline is octane)?

2)

Why would you assume that gasoline is octane ?
 
S

Stephen J. Rush

Jan 1, 1970
0
CDD- Yes this is the wrong place for this Question But as for the
above answer
complete combustion of a hydrocarbon does not give H2O as an
end
product more like if motor is running rich -high carbonmonoxide-CO
output-- proper fuel mixture
means an increase in CO2 output -octane is not gasoline it is an
aditive used to stop
preignition.

Nope. Octane is a hydrocarbon, C6H18. It exists in several isomers, one
of which 2,2,4 trimethylpentane, is the reference standard for rating
gasolines for knock resistance. To rate a batch of gasoline, a test
engine was run on various mixtures of 2,2,4 TMP and heptane until it
knocked as much as on the fuel under test. The percentage of octane in
that mixture was the rating. Maybe you're confusing octane with the
tetraethyl lead that was once used to boost the octane rating of gasolines.

Perfect combustion of any pure hydrocarbon gives carbon dioxide and water.
The problem is that, in an engine, the fuel doesn't have time to burn
completely. There is also the problem of nitrogen oxides. The way you
reduce the oxidation of nitrogen in the engine is to lower flame
temperatures with exhaust-gas recirculation, but that makes the
incomplete combustion problem worse. The patch for that was the
catalytic converter, which burns up the unburned gasoline in the exhaust
system.
 
J

jasen

Jan 1, 1970
0
CDD- Yes this is the wrong place for this Question But as for the
above answer
complete combustion of a hydrocarbon does not give H2O as an
end
product more like if motor is running rich -high carbonmonoxide-CO
output-- proper fuel mixture
means an increase in CO2 output
-octane is not gasoline it is an aditive used to stop preignition.

octane is C8H18 and is usable as gasoline. pure octane has an octane rating
of 100. typical gasoline is a blend of hydrocarbons
without it your engine would try to diesel when hot or
when a high compression engine is used

high compression engines typically stop dieseling by cutting off the fuel
suply

Bye.
Jasen
 
C

cdd

Jan 1, 1970
0
octane is C8H18 and is usable as gasoline. pure octane has an octane rating
of 100. typical gasoline is a blend of hydrocarbons


high compression engines typically stop dieseling by cutting off the fuel
suply

Bye.
Jasen

Havn't found one of those on my twin 650 holleys-sorry (yes I do now
what you mean-
solinoid on the primary circuit of carb)

correct me if wrong but I thought the byprodicts of a running endine
were

Carbon Monoxide CO In complete chemical combination
of carbon
from fuel and
atmosperic oxygen.

Carbon dioxide CO2 Chemical combination of carbon
from fuel
and oxygen.

hydro carbons HC unburnt fuel

water H2O Chemical combination of
hydrogen from fuel and
atmospheric
oxygen

Oxides of nitrogen NOx* Chemical combination of
atmospheric nitrogen and oxygen
at high
temperates.

nitrogen N2 Atmospheric nitrogen
which has not reated chemically
with other
products

Sometimes
Lead PB lead particles from
fuel anti-knock additives

well as far as I can remember it goes something like this-If not
please enlighten me?



thank's

cdd
 
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