5 years ago
More info needed...
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...
What will you do with the logs after they are made? A bit more info needed :)
I use those logs as a fuel for boilers.
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?
2 seconds in google and I found this why didn't you?
StarchStarch 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 powder. ClayClay 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 ArabicGum 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. MolassesMolasses 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 PitchWood 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 paste.
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.