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Questions tagged [pyrolysis]

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5 votes
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How predictable are the decomposition temperatures of trithiocarbonates?

How do the following parameters: Ionic radius of a cation. Oxidation number of a cation. Noble metal cation vs alkali metal cation. Something else that I may not know about. affect the decomposition ...
Paul Kolk's user avatar
  • 200
0 votes
1 answer
148 views

Products formed upon pyrolysis of alkanes

What sort of products will be formed when we subject a higher alkane (say decane) to pyrolysis by heating at 773-973 K in the presence of $\ce{H2/Ni}$? I know that lower aliphatic alkanes and alkenes ...
calcandquant's user avatar
2 votes
0 answers
56 views

High-temperature interactions with salts on nichrome wire

I'm working on creating aluminium-doped zinc oxide (AZO) thin films, but instead of the usual glass substrate, I want to try this on a fine nichrome wire. I'm using a mix of zinc acetate $\ce{Zn(...
Thomas Pluck's user avatar
-1 votes
1 answer
79 views

Creating a Simplified Model for Temperature Change in Auto-Ignition of A4 Office Paper [closed]

When paper reached a certain temperature, auto-ignition occurs, and then there is a process that makes the temperature rise to around 1000 to 1500 Celsius degrees. How can I make a simplified model ...
LaTap's user avatar
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1 vote
0 answers
212 views

Chemical equation of wood to charcoal pyrolysis

The equation for the perfect burning of wood is approximately: $$\ce{C_xH_yO_z + VOCs + O2 -> CO2 + H2O + volatiles + heat}$$ Where $\ce{C_xH_yO_z}$ represents the cellulose and lignin and VOCs are ...
Adrien Hingert's user avatar
1 vote
0 answers
35 views

What carbonaceous form would result from pyrolysing HMW hydrocarbons and powdered biochar together?

I understand that charcoal/biochar are mostly "amorphous carbon," and that the production of graphite via pyrolysis requires using a <60% C feedstock that will exists in liquid phase ...
Robherc KV5ROB's user avatar
3 votes
1 answer
109 views

Safe disposal of pyrolysis side products in production of wood gas

I am in the process of building a pyrolysis chamber producing wood gas for use in a generator. The process involves heating a batch of biomass (wood) in absence of oxygen (air) in a closed vessel, and ...
Elmore's user avatar
  • 139
2 votes
1 answer
316 views

Would wood turn into charcoal faster if it is burned in a pressurized environment?

It is very easy to make charcoal from firewood and there are many tutorials about this online. However they all state that the process of turning firewood into charcoal can take atleast 3 to 4 hours. ...
Maurice's user avatar
  • 119
-1 votes
1 answer
275 views

Why pyrolysis of C6H10 doesn't give C5H10 + CH4 [closed]

In my book it's given pyrolysis of C6H14 gives C6H12 + H2 Or C4H8 + C2H6 Or C3H6+C2H4+ CH4 ( as it gives atleast one alkene) but there are other possible alkenes as well such as C5H10.
anonymous's user avatar
2 votes
1 answer
127 views

Trial by fire: Safely heating sand without it agglomerating?

Wikipidia quotes a melting point of 1713C for sand. I went on the beach to get some sand. I assume it's a mix of all kinds of stuff. The finality is to prepare a big pile of clean sand to use as ...
Hans's user avatar
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0 votes
1 answer
1k views

Can you separate CO2 into carbon and oxygen using pyrolysis? [duplicate]

I recently read about a pyrolysis process that separates methane into Carbon and Hydrogen. The basic technology/process is you have a vertical column of super-heated liquid metal and you inject ...
Lee's user avatar
  • 29
2 votes
1 answer
596 views

Make Acetic Acid from wood

I would like to know if it would be possible to make Acetic Acid from Wood. I know that you can charcoal wood to get the gases, cool it, and get the liquid. This would yield a bunch of chemicals in a ...
Salmoncatt's user avatar
0 votes
0 answers
251 views

Difference between calcination, roasting and pyrolysis

Hie everyone. I have been going through pyrometallurgical processes for recycling lithium-ion batteries and l have been coming across these terms; calcination, pyrolysis and roasting which l need ...
bryanmaks's user avatar
2 votes
1 answer
602 views

Pyrolysis of calcium chloride dihydrate

Does the pyrolysis of $\ce{CaCl2 · 2 H2O}$ give $\ce{CaCl2 + 2 H2O}$ or $\ce{Ca(OH)2 + 2 HCl}?$
Just A Young Artist's user avatar
2 votes
1 answer
198 views

Is the pyrolysis of tetrachloroaluminate(III) anion possible?

Wikipedia says that lithium tetrafluoroborate decomposes to lithium fluoride and boron trifluoride when heated. Does the same hold for sodium tetrachloroaluminate (all anhydrous) as well?
Just A Young Artist's user avatar
1 vote
1 answer
85 views

Combustion and pyrolysis of sulfides and organosulfurs

Last week there was a huge fire in french chemical factory Lubrizol, we now know the main products that burnt, to simplify the discussion I extracted a few compounds: isobutyl and isobutene ...
reuns's user avatar
  • 111
2 votes
0 answers
44 views

Why does pyrolysis activate carbon?

I am doing a project that involves activating carbon. The method my team is using is simply to heat it within the range of 400-500°C, and then testing for activity by using a dye. Why does simply ...
J.Acob's user avatar
  • 21
3 votes
0 answers
352 views

Hoffmann's rule in ester pyrolysis

Why is the Hoffmann's product the major product in the pyrolysis of an ester to form a carboxylic acid and alkene?
Aaron John Sabu's user avatar
3 votes
3 answers
3k views

Why can wood burn all the way to charcoal instead of just creating a passivating charcoal layer?

I know burning to charcoal is actually incomplete combustion because charcoal can also burn. When a strike anywhere match burns, it burns all the way to charcoal but the charcoal doesn't further burn. ...
Timothy's user avatar
  • 478
10 votes
1 answer
441 views

Gases produced by pyrolysis of cellulose

I heated cotton in a sealed container (with a small hole) over a natural gas flame. Some gases and smoke were produced. What would they probably be? I can come up with some guesses based on the ...
sadljkfhalskdjfh's user avatar
1 vote
1 answer
80 views

Heating paper to a yellowish smoke

I put some papers into a biscuit tin and put it over fire and baked it. Then I made a small hole at the top and saw yellowish smoke coming out. Any idea what the smoke could be?
xEcoBlue's user avatar
2 votes
1 answer
2k views

Why does burning wood produce methane and other hydrocarbon chains?

This post kinda helps me understand and it sounds like it has to do with pyrolysis, but I'm having trouble putting the exact reactions together.
Tyler Crompton's user avatar
1 vote
1 answer
2k views

Difference between calcination and pyrolysis

What is the difference between calcination and pyrolysis? I understand they both involve heat treatment but each under a different type of atmosphere, which leads to some sort of reduction reaction? ...
user avatar
3 votes
1 answer
199 views

Pyrolysis of canola oil

This is a topic that I cannot find much information about. I would like to know what compounds are in the products formed from pyrolysis of canola oil. I found out by accident that when trying to ...
MICROexchange6's user avatar
8 votes
4 answers
3k views

Can paper burn without oxygen or air?

If you put a paper inside an oven vacuum packed and go beyond $250~\mathrm{^\circ C}$, will it burn? There's no oxidizer. If not, what will happen?
sospedra's user avatar
  • 207
3 votes
2 answers
3k views

Better understanding the pyrolysis reaction

I'm no chemist, but much of my work revolves around biochar. I've always understood it with the following rough approximation: $$ \ce{CH2O (dry plant matter) + heat -> black carbon + H2 + CO + ...
generic_user's user avatar
2 votes
1 answer
175 views

Metal extraction by pyrolysis

There is a process named solar furnace pyrolysis which is used to reduce the oxides of various elements by concentrating solar energy. Oxygen is liberated but an oxide slag is left. $$\ce{SiO2 ->[...
kumar saurabh raj's user avatar