Relates to the mixture used to produce a large amount of energy.

learn more… | top users | synonyms

0
votes
1answer
20 views

How is the octane percentage defined?

Normally octane percentage is mentioned on petrol (95% octane). How is this defined? Is it percentage of chemical or some other parameters?
1
vote
1answer
43 views

Why is CO a major species only in fuel-rich combustion?

In fuel-rich combustion, my understanding is that enough fuel reacts and consumes all of the oxygen present. The combustion products $\ce{CO2}$ and $\ce{H2O}$ undergo dissociation until equilibrium is ...
0
votes
0answers
35 views

Fuel Cell Chart - Anode, Cathode, Electrolyte

Can someone please check my table to make sure I have the correct information. I am especially unsure of the parts highlighted in yellow:
1
vote
2answers
58 views

Are homemade batteries a practical alternative during a blackout?

If your home lost power without warning; are homemade batteries (such as the lemon/potato variety described in this question Are homemade batteries economically practical?) a practical alternative for ...
4
votes
2answers
380 views

Are homemade batteries economically practical?

Every kid who has been to a science fair knows that you can make a battery with a lemon, a potato, a penny and a nail. I've never done this and I'm not entirely clear on how it works beyond a hazy ...
2
votes
2answers
54 views

Microbial Fuel Cell

Does anyone know of a step by step guide to building a microbial fuel cell? Could someone here on Chem SE possibly provide one? I am looking for something like THIS but for the whole fuel cell and not ...
3
votes
1answer
90 views

What is this red substance that has accumulated at the bottom of a plastic bottle full of petrol (see picture)?

About two weeks ago I put some ordinary unleaded petrol into a plastic water bottle, as a temporary measure (long story, don't ask!). It has now formed a reddish liquid at the bottom of the bottle. ...
5
votes
1answer
68 views

How can I reduce Crystallization temperature of seed oil to be used in winter as biodiesel?

How can I reduce Crystallisation temperature of seed oil to be used in winter as biodiesel? The glycerol has been removed from the oil, and white spirit is used to reduce its viscosity.
2
votes
1answer
965 views

What are some good research topics for a high school student?

I absolutely love chemistry and I really want to take part in science fairs. I am also taking an AP chemistry class. Cleaner fuel and energy sources and air pollution (especially due to smog and ...
2
votes
1answer
51 views

Could this be a feasible fuel system?

First off, please forgive me, I am a chemistry novice! Overall Process Fuel for the system is distilled water Split water into Hydrogen and Oxygen (electrolysis or similar process) Exhaust Oxygen ...
0
votes
1answer
73 views

Is there a way to turn cellulose into sugar, at home? (For small scale, DIY alcohol fuel)

I know that once you have sugars, you can ferment, distill, and dehydrate to create 95+% ethanol. I've also read about cellulosic ethanol, with the new step there being the breakdown of the cellulose ...
2
votes
1answer
83 views

Which is the best rocket fuel?

I searched on internet about rocket fuel and the most common fuel is $\ce{KNO3}$ + Sugar ( Rocket Candy ) , but i think that i could use another fuel methods, like using can with gas or using ...
11
votes
3answers
154 views

Open flame combustion in bizzaro world

Humans typically achieve combustion by starting a chemical reaction of a fuel (often a carbon $C$ containing fluid like methan $CH_4$), which is is brought into an an oxidizer ($O$ containing gas, ...
4
votes
1answer
236 views

How can diesel fuel produce less carbon monoxide but more carbon particulates?

My guess at why diesel produces more carbon monoxide is that more heat is required for combustion of diesel fuel, so there is therefore less incomplete combustion, so rather than carbon monoxide being ...
8
votes
1answer
783 views

Is there a point at which Ethanol (E10) fuel becomes harmful to gas tanks or engines if not used?

This is not the typical chemistry question on this website, but I think it's an important practical question. When I got a gas string trimmer, the woman who worked at the gardening shop told me that ...
0
votes
1answer
126 views

How to calculate weight of CO2 in one kg of fuel

I'm trying to do homework and I have the answers to the problems but I can't read the explanation because it's illegible and I can't find how it's done in my notes. Here's the simplest example: ...
2
votes
1answer
2k views

Why does the boiling and freezing-point of non-polar molecules rise with increasing molecular mass?

In the section about fuels, my textbook mentions that the boiling and freezing-points of alkanes (which are non-polar) increase with an increase in molecular mass due to London dispersion forces. ...
2
votes
2answers
155 views

What are the major environmental drawbacks with using methane as a combustable fuel?

What are the biggest environmental issues with using methane, $\ce{CH4}$, (which is found as the major energy source in natural gas, shale gas, biogas, and synthetic natural gas), as a combustible ...
5
votes
1answer
149 views

What are the key chemical characteristics that determine the octane rating of fuel?

The octane rating of petrol (gasoline) is a measure of the how much compression a fuel air mixture can have before detonating (which in petrol engines is a bad thing as you want the mix to combust ...