charcoal briquette

Moisture Content:

Ideally, charcoal should have a low moisture content to ensure efficient burning. A moisture content of 7% or less is common for barbeque charcoal, with higher grades potentially having less than 7%. 

Ash Content:

Ash is the remaining residue after burning. Low ash content is desirable for clean burning and minimal residue. Standard charcoal typically has an ash content of no more than 4%. 

Calorific Value:

This refers to the amount of heat energy released during combustion. Good quality charcoal, like that made from coconut shells, can have a calorific value of 7500-8500 Kcal. 

Volatile Matter:

Volatile matter is the portion of the charcoal that burns rapidly and produces smoke. Lower volatile matter content results in cleaner burning and less smoke. 

Fixed Carbon:

Fixed carbon is the primary component of charcoal and contributes to its overall calorific value. High fixed carbon content, often 76-78%, is associated with better quality. 

Burning Duration:

The length of time the charcoal burns before needing to be replaced or refilled is a crucial factor, especially for cooking and grilling applications. Barbeque charcoal may have a burning duration of 2 hours or more. 

Ash Color:

White ash is generally preferred, indicating good quality and efficient burning. 

Form Endurance:

The ability of the charcoal to maintain its shape during burning is important, especially for briquettes. A good grade charcoal will be able to withstand a 60% drop test. 

Size and Shape:

Charcoal can be found in various forms, including lump charcoal, briquettes, and even hexagonal or finger shapes. The specific shape and size depend on the intended use.