How do you find out the quality of coconut shell charcoal briquettes?

What is the standard

of coconut shell charcoal briquettes?

by SKN Editor

If we want to know how the standard or quality of a coconut shell charcoal briquette is, then we can have to know which laboratory tests show the quality of coconut shell charcoal briquettes.

The following Standard Quality Requirements for Coconut Shell Charcoal Briquettes usually used:


A. Water Moisture

Sample test is approximately 1 gram (X), dried in an oven. electricity with a temperature of 1000C for 24 hours, then weighed (Y), then the water content is stated in the following formula Sudrajat, (1983)


x = sample weight before drying (g)

y = the weight of the sample after drying (g)

Water content that usually used is ≤ 8%.


B. Calorific Value

The heat value of a substance can be measured based on reaction heat and fixed volume. Measurement of heat value is done using a tool Bomb Calorimeter. Calculate the amount of heat capacity available in the sample with the following formula:

Where :

Q = The amount of heat (calories) issued by the sample (J)

△ T = Constant temperature difference after and before bombing (oC)

W = heat type from temperature is 2426 cal / oC

e1 = Factor

e2 = Correction factor for gas (titration volume x 1 cal / ml)

e3 = Correction factor for sulfur content

Value for Calorific Value that  fulfill standards is ≥ 5.000 Joules.


C. Ash Content

Ash consists of minerals that cannot be lost or evaporated in the condensation process. The porcelain plate containing the test sample from the determination of volatile content was placed in a thermolyne furnace at ± 7500C for 6 hours. After the travel time is removed and cooled in a desiccator, then analyzed. Ash content is expressed in percent by the Sudrajat formula (1982) as follows:

Information :

S = The remaining weight of the test sample (g)

W = Weight of dry kiln test sample (g)

Value of Ash Content that usually fulfill standards is ≤ 8%.


D. Volatile substances

The volatile substance is obtained by evaporating all volatile substances in charcoal briquettes other than water. The porcelain cup containing the test sample from the determination of water content was heated in a thermo lyne furnance at a temperature of ± 900oC. The temperature is raised directly when the appliance is turned on, the scale of the tool shows for 8 minutes, then the device is turned off and the sample is removed and then inserted into the desiccator and then weighed. Volatile levels are stated in the following formula (ASTTMD 1762-64).

VM = volatile substance (%)

Y = Loss of test sample weight (g)

W = Weight of dry kiln test sample (g)

Value of volatile substances which fulfill standard is ≤ 15%.


E. Fixed Carbon Content

The carbon fraction (C) in charcoal, in addition to the determination of ash and volatile fractions, is done by heating as follows:

Fixed carbon content = (100 – ash content volatile substances)%.

Value of Bonded Carbon Content that fulfill standards is ≥ 15%.


Reference :

  1. 1983. Pengaruh Bahan Baku, Jenis Perekat, dan Tekanan Kempa terhadap Kualitas Briket Arang. Laporan
        Lembaga Penelitian Hasil Hutan No. 165 Hal 7-17. Pusat Penelitian dan Pengembangan Hasil. Bogor.
  1. SNI 06-6235. 2000. Briket Arang Kayu. Badan Standardisasi Nasional. Senayan, Jakarta : 1-4
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