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Questions tagged [fuel]

Questions regarding fuels and the properties of fuels, like calorific value, octane number, mechanism of combustion, etc., should use this tag.

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Fuel Cell Water Waste [on hold]

What is the quality of the water produced by a Proton-exchange membrane fuel cell?
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42 views

Is there a stable and non-toxic hydro-nitrogen-oxygen compound that's liquid in room temperature?

Is there a stable (i.e. does not turn into other substance when stored in a bottle exposed to the elements or explode/combust spontaneously or under mechanical impact) compound that contains just $\...
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Composition difference between #2 and #2D fuel oil

I have read that #2 and #2D fuel oil are essentially the same, but the #2D might have less sulfur. I have read others that say that #2 has a higher cloud point, so if that is true, then there are some ...
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33 views

Is it possible to turn food into fuel for a combustion engine? [closed]

According to McDonald's Nutrition Calculator page, the following order would contain 2480 kilocalories (or 10376 kilojoules): 1 x Double Bacon Smokehouse Burger 1 x Large Chocolate Shake 1 x Large ...
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37 views

How do you figure out fuel specific impulse non-experimentally?

Simple question, probably very complicated answer: Without building a test engine/rocket and finding out experimentally, that is to say, based on chemical characteristics alone, how can one compute ...
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Calorific values of biodiesels synthesized from vegetable oils

Calorific values of biodiesels vary depending on the feedstock used in synthesizing it. Although it's not by a lot, is there a particular reason for this? I suspect it's something to do with the ...
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341 views

Why do highly branched alkanes have higher octane numbers than their corresponding linear isomer?

The octane number of fuels are based on a set of primary reference fuels, which are mixtures of iso-octane and n-heptane. Now iso-octane being branched alkane has very less tendency to react and given ...
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1answer
68 views

Regarding interaction with metal sword and white gas

I have a large sword that is comprised of over 1000 layers of Titanium and High Carbon Steel. I wrapped it in Kevlar Wick and I set it on fire using Coleman White Gas (Camp Fuel) for performances. ...
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46 views

Would a hydrogen/oxygen fuel cell be a good choice for energy storage and generation in H2 rich atmospheric environments?

So imagine an atmospheric probe sent to enter the atmosphere of a giant gas planet. There would be no need to store hydrogen since a compressor or an inlet with sufficient dynamic pressure would allow ...
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1answer
36 views

Polluting agents generated by road traffic in a city [closed]

I want to measure the air quality according to road traffic in a city. What are the polluting agents (generated by fuel combustion) strictly related and generated by road vehicles that is worth ...
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51 views

iso-octane vs cyclohexane

I am conducting an experiment on the resistant of serval rubber compounds to jet fuel, specifically "Jet fuel RF" ( 31% Toluene, 34% Cyclohexane, 34% Iso-octane, 1% Di-tert butyl Disulfide.) ...
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108 views

What dangers/risks are there in the production of carbon subnitride?

I was reading that carbon subnitride or Dicyanoacetylene has one of the hottest flames when used as a fuel, but it also is unstable and can explode easily into carbon powder (no specifics on cause). ...
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133 views

How can we separate carbon monoxide from wood gas?

I am thinking about using open source wiki designs from allpowerlabs to construct a wood gas generator. The motivation came from experiencing a 10 day power outage after super storm Sandy. The ...
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1answer
46 views

Can we use liquid hydrogen to power a conventional engine? [closed]

Hydrogen has the best fuel efficiency, so if we were to use it in our engines wouldn't their efficiency increase as well. The engines would require changes and all but would it be plausible to have ...
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1answer
83 views

How do antioxidants work? [closed]

A friend and I are doing a project that involves the process behind manufacturing Jet A-1 and specifically the specifications highlighted in DEF 91-91. I was interested to see the information at the ...
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39 views

Can I approximate the CO concentration of a combustion product, if I know the CO2 and O2 concentration?

Assume I have the product (exhaust gas) from a combusted air/petrol mix. The mixing ratio was richer than stoichiometric (i.e., air:fuel < 14.67 in this case), so there was no excess of oxygen. I ...
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48 views

Could UV lasers be used to split CO2 and H2O?

I was wondering whether intense UV light, tuned to the correct wavelength, could be used to split carbon dioxide and water molecules as a first step towards synthesizing liquid fuels.
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302 views

Is the flame temperature of a burning fuel affected by pre-heating the fuel?

This page on Adiabatic temperatures helpfully lists the theoretical maximum temperatures that flames will reach under certain conditions for a number of fuels. They assume initial atmospheric ...
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174 views

Platinum-coated razor blades for making a fuel cell

My daughter wants to construct a fuel cell for a school project. Budget is tight and platinum as preferred catalyst expensive. I know that Gillette razor blades are coated with platinum. Would there ...
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139 views

Can hydrogen alone be used as a fuel? [duplicate]

I have always thought that fuel such as petrol, diesel, etc.. are getting burnt to move the pistons in the car (I am not bringing physics). Why not hydrogen be used as a fuel but I know the incident ...
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1answer
1k views

Why does diesel have a higher energy density than gasoline?

One of the primary reasons why hydrocarbons produce energy is the production of water during the combustion process. I've been trying to find out why diesel is considered to have a higher energy ...
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3answers
848 views

Number of electrons transferred & Gibbs free energy

To determine the number of electrons transferred for the following reaction: $$\ce{CH3OH + \frac{3}{2} O2 -> CO2 + 2 H2O}$$ I found the half reactions to be: $$\text{Anode: } \ce{CH3OH + H2O -&...
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1answer
80 views

Can plastic be used as fuel for vehicles? [closed]

I don't have much of a background in chemistry, but I know that plastics are largely made of carbon, as is oil. Is there any way to "covert", i.e. a plastic water bottle, into a substance that can be ...
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2answers
1k views

Will Ammonia react with Gasoline mixed with Ethanol?

Recently the South Koreans invented a car that runs on an 70% ammonia 30% gasoline fuel mix. (link) In America we already have instituted policies that require refueling stations to mix Ethanol ...
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1answer
610 views

HDPE bottle for gasoline?

What are the risks of storing E10 gasoline in a gallon HDPE container for a few months, vs storing in a proper plastic fuel can? Assuming the HDPE gallon is thick (used for Hydrochloric acid before, ...
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1answer
111 views

is there a filter to seperate glycerol and biodiesel?

i am currently working on a project of manufacturing biodiesel from cooking oils by the process "TRANSESTERIFICATION". at the end of this reaction, after the reaction mixture settles I have two layers ...
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2answers
1k views

Is liquid hydrogen rocket propeller pollution free?

If one searches for the different fuel types used in rockets, one can find that over the years, NASA and other space agencies have used both solid fuels and liquid fuels. I can see that more and more ...
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200 views

What can I use to produce carbon fuel from carbon dioxide? [closed]

Can fuel that can use carbon dioxide as an oxidizer? I know this is a strange inquiry, but could a engine be made to use $CO_2$ in the martian atmosphere the same way aircraft uses $O_2$ on Earth?
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2k views

Removal of calcium from calcium-ammonium nitrate?

I am interested in model rocketry, and need to produce small quantities of pottasium nitrate. For this process I need ammonium nitrate, but I only have calcium ammonium nitrate. Is there a simple ...
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1answer
49 views

Usage of ammonia as odorant in fuel gases

Usually, thiols such as ethanethiol are added to fuel gases to warn the user of a leak. Why is a few percent of ammonia not used instead? Ammonia is flammable so it will burn to nitrogen and water in ...
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71 views

Which one is the healthiest to operate a lantern with: kerosene, diesel or sunflower oil?

Given a lantern (originally made for kerosene) however, I'm looking for the fuel which is the safest for indoor use. I've already tried different kinds, and found three of them that burn just as ...
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92 views

How do I get the number of moles in a Diesel combustion, based only on emission gases?

I measured with a Bacharach ECA 450 the gas emissions on a Diesel car to do a thermodynamical analysis. Data obtained from Bacharach ECA 450: $$\begin{align}\ce{O2} &= 18.2~\%\\ \ce{CO} &= ...
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Making solid fuel out of sugar

I recently tried to make a cheap solid fuel out of sugar. First I attempted burning the sugar cube directly, which did not work well even using a blowtorch. This was expected. Then I attempted to use ...
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570 views

Are fossil fuels and petroleum the same thing?

I've been reading articles about renewable energy, and in comments people talk about fossil fuels and petroleum as examples of non-renewable types of fuel. Sometimes they are used interchangeably, or ...
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304 views

Water-gas shift reaction without catalysts

I'm designing an experimental gas generator. The details are not really important here, but I want to convert a mixture of carbon monoxide, hydrogen and $\ce{H2O}$ gas to a safer form. I know the ...
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1answer
110 views

Release of sulfur dioxide from odored fuel gases

Often, fuel gases such as butane and natural gas (methane) are mixed with some foul-smelling impurities such as thiols (mercaptans) and hydrogen sulfide. Presumably, anything containing sulfur would ...
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3answers
777 views

Storage of methane in mineral oil or other liquid hydrocarbons

Is it practical (or even possible) to store gaseous alkanes such as methane or ethane in liquid non-polar solvents, such as mineral oil or vegetable oil, and how much more (or less) methane can be ...
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Is there a such thing as a reburnable gas or can one be created?

I want to know is there a such thing as a gas that can be reburned multiple times?
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123 views

Cleanliness of Fuel [closed]

Is there any unit to measure cleanliness of a fuel? Sort of like calorific value which measures the fuel efficiency, is there any unit which signifies the cleanliness of a fuel. I have heard of "...
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3answers
2k views

Can ethanol alone be used as Fuel?

Ethanol is a clean fuel and added as an additive to petrol. Why can't ethanol itself be used as fuel?
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97 views

Production of hydrogen through the reaction of aluminium metal and sodium hydroxide

If I have a solution of 25% $\ce{NaOH}$, and I simply add a cut-up aluminium can or some aluminium foil, will it react into hydrogen and sodium aluminate? In principle this reaction should happen, ...
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402 views

Is it possible to efficiently convert hydrogen to methane?

According to this wikipedia page, hydrogen can combine with the carbon found in carbon steel to form some methane inside the steel, weakening it. Is is possible to convert hydrogen to methane by ...
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2answers
1k views

How is it possible to safely use carbon monoxide as a fuel?

Is there anything that will allow carbon monoxide to be used as a fuel? It is quite toxic, but has attractive properties otherwise (only produces CO2 with no water, also no smoke or soot). Aside from ...
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1answer
541 views

Rocket propellants: accuracy of vapor pressure estimation techniques

I would like to determine the vapore pressures of a couple of substances (rocket propellants) over a significant temperature range within a ~10% error margin. For a first test, I tried to ...
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764 views

Why do branched hydrocarbons burn more efficiently (complete & clean combustion)?

Branched and cycled hydrocarbons usually a higher octane number than their straight chain counterparts. This is due to a more complete and clean (no residue) combustion. In addition, there is no ...
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2answers
361 views

How can we produce gasoline from electricity without fossil fuels?

The other day, I was wondering, if cheap and easy nuclear fusion were developed tomorrow and fossil fuels disappeared, would there be a way to fuel all the gas-powered cars out there? After all, we ...
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207 views

How quickly will steel lose structural strength from a heat flash?

I want to know if a sustained jet fuel burn around steel has the ability to make the steel structurally unsound. It seems like any applied heat that effects steel will be a kind of "heat flash": a ...
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1answer
155 views

Create small amounts of cellulose ethanol from bamboo?

I own a medium-sized farm and commercial aquaponics business in Pennsylvania. I try to make my business as green, sustainable, carbon neutral and self-sufficient as possible. As a way to cut out ...
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342 views

Could the net equations for burning hexene be used as a means of energy source?

$6\ce{CO_2} + 6\ce{H_2O}\xrightarrow{some\;catalyst}9\ce O_2 + \ce{C_6H_{12}}$ $\ce{C_6H_{12}} + 6\ce O_2\to 6\ce{CO_2} + 6\ce H_2$ $6\ce H_2 + 3\ce O_2\to 6\ce{H_2O}$ At one point, I had made a ...