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I am an engineering student. i am doing a project on making leaf logs. can anyone suggest a binder? Answered



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drew campbell
drew campbell

Answer 5 years ago

Its basically pulverising the leaves and then compressing it with addition of some adhesives so that it can be converted in to logs . but i am not sure what adhesive to use for leaves...


Answer 5 years ago

What will you do with the logs after they are made? A bit more info needed :)

drew campbell
drew campbell

Answer 5 years ago

I use those logs as a fuel for boilers.


Answer 5 years ago

So I see that it should be an adhesive that won't give off dangerous fumes in a fire...

Can't you compress them to the point where they'll just stay together in a block? Like a mold that can compress the leaves inside?


Answer 5 years ago


Starch is the most common binder though it is usually expensive. It
doesn't have to be an food grade. In general, about 4-8% of starch is
needed to make the briquettes. Starch sources can be corn starch, wheat
starch, maize flour, wheat flour, rice flour, cassava flour, potato
starch, etc. To use the starch as a binder, you must first gelatinize
the starch, which is added to water and heated to form a sticky
consistency, then adding to the mixer to be mixed with the charcoal


Clay is widely available available at almost no cost in many areas. A
briquette can contain about 15% of clay. Clay does not add to the
heating value of the briquette. If too much clay is added, the briquette
will ignite and burn poorly or not at all. Besides, clay will turn into
ash after burning, which blocks the passage of radiant heat, resulting
in the loss of heating value of the charcoal.

Gum Arabic

Gum Arabic, also known as acacia gum, is a natural gum harvested from
acacia tree, which is very common in Africa Sahel, especially Senegal,
Sudan, Somalia, etc. Gum Arabic is successfully being used as binder
material for charcoal briquette. It does not emit heavy smoke, nor is
thermal treatment needed.


Molasses is a by-product of the sugarcane industry. One tonne of
briquettes needs about 20-25% molasses. Briquettes binded by molasses
burn well, but have an unpleasant smell during combustion. To avoid
this, thermal treatment can be applied before using the briquette, which
is also called”curing”.

Wood Tar and Pitch

Wood tar arises during the carbonisation process and are recovered from
stationary kilns and retorts. Pitch is a viscous liquid that remains
after the distillation of coal tar. Tar is more liquid while pitch is
more solid. Both of them require re-carbonisation to avoid the emission
of heavy smoke which may generate adverse health.

Besides, cow dung and paper pulp also can be the binding material for
briquettes. Cow dung is available mainly in rural areas. Waste papers
are torn to small pieces and soaked in water to form a gelatinized


5 years ago

What have you tried already ? What ideas have you had ?

Wood pellets are "glued" by heating them until the lignin polymers sort of fuse. Do leaves do the same ?

Could you use starches ?


How little of a binder works ?

You're an engineering student, do some research yourself, and come back with questions, its not our job to do your research for you.