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Coconut Shells

Coconut Palms (Cocos Nucifera) grow in more than 80 countries in southern and southwestern Africa, Latin America and Asia. "Cocos" is old Spanish/Portuguese language and means "grinning face", which refers to the facial expressions at the "top" of the coconut's hard shell from which it sprouts.

Coconut palms have a total production of coconut fruits of more than 60 million tons per year. The Philippines is the largest producer followed by Indonesia and India, but also Thailand, Malaysia, Sri Lanka, Ghana, Ivory Coast, Tanzania and Brazil are major producers of coconuts.

Coconut palms are available in only one species which is very difficult to grow in dry climates and can not grow without frequent irrigation. Although coconut palms are only available in one species this single species is available in a large number of variants with quite large differences in appearance, height and taste of the extracted coconut. The description on this page covers only the "big" coconut palm which dominates in Asia and Africa.

The coconut palm is a large palm tree that grows up to 30 meters (98 feet) in height with pinnate leaves that are 4-6 meters (13-20 feet) long with "ears" 60-90 cm long. Old leaves break off clean leaving the trunk smooth. On very fertile land, a coconut palm yield up to 75 fruits per year, but often gives less than 30, mainly due to poor agricultural practices. In recent years, improvements in cultivation and breeding produced coconut palm trees that give a higher yield than previously.

Botanical coconut fruit is a "drupe" not a true nut. Like other fruits the coconut fruit has three layers: exocarp (soft shell), mesocarp (hard shell) and the shelled kernel. Exocarp and mesocarp make up the "shells" of coconut. Coconuts sold in the shops of non-tropical countries, have often been exocarp (the outer, soft layer) removed. The inside of the mesocarp (hard-shell) called copra (white) and consists of a fiber called coir which have many traditional and commercial uses. The coconut has three pores (stoma), or "eyes", which are visible on the outer surface when the soft shell is removed. A full-grown coconut fruit weighs about 1.44 kg. It takes around 6000 full-grown coconuts to produce a tonne of copra (coconut).

Coconuts are coconut fruit, wherein the soft shell is removed. Coconut Its hard to be broken and removed as part of the production of coconut, coconut milk and coconut oil. The hard coconut shell has itself a number of applications ranging from decorative items and kitchenware for the production of activated carbon and as fuel either dried or charred.

Palm Shells
Coconut palm tree. Coconut palms grow up to 30 feet in height. Coconut fruits are high in palm crown.

Palm Shells
Coconut fruits. A single coconut palm produces 30-75 coconut fruits per year.

Palm Shells
Overview of the coconut fruit structure and content.

Palm Shells
Fresh cut coconut fruit. The three layers are clearly visible with the hard shell as middle layer.

Palm Shells
Grinning face. A dehusked coconut shell showing the face-like markings.

Palm Shells
Dried cut coconut fruit. The three layers are clearly visible with the hard shell as the middle layer.

Palm Shells
Coconut shells. Coconut shells are a waste product from such production of coconut milk and dried coconut.

Palm Shells
Coconut shells. Coconut shells have a high calorific value.

Preparation

The various parts of the coconut fruit has different uses. The outer (green) layer - the soft shell - is partly used as fertilizer, partly as firewood, and partly for the extraction of fibers for content in mattresses, etc. and partly for the extraction of germination medium (Coco Peat) in nurseries.

The hard shell that appears after the soft shell is removed has a high calorific value due to the high carbon content, and is for the same reason also used for the production of activated carbon of very high quality.

The various inner parts of the coconut has a number of culinary uses. Nut provides oil for frying, cooking, and margarine. Coconut butter is often used to describe solidified coconut oil, but is also the name of certain specialty products made ​​of coconut milk solids or pureed kokoskød and oil. Dried coconut is used as fill to include Bounty chocolate bar.

The white fleshy part inside the nut is to be used fresh or dried in cooking especially in confections and desserts like macaroons. Desiccated coconut and coconut milk made ​​from coconut is often used for curries and other spicy dishes. Coconut flakes have also been developed for use in baking, in particular to combat malnutrition. Coconut Chips are sold in tourist areas of Hawaii and the Caribbean.

Coconut shells are a waste product from the production of coconut milk, desiccated coconut, dried coconut and coconut oil. In Asia, coconut milk factories are the major "producers" of coconut shells.

Content

As received
Moisture 15-16%
Ash 0.5%
Chlorine 0.09%
Sulfur 0.02%
Carbon 43.2%
Hydrogen 6.6%
Nitrogen 0.11%
Gross Calorific Value 4,800 kWh/MT - 17.18 GJ/MT
Net Calorific Value 4,400 kWh/MT - 15.74 GJ/MT
On dry matter
Moisture 0%
Ash 0.6%
Chlorine 0.11%
Sulfur 0.03%
Carbon 51.2%
Hydrogen 5.7%
Nitrogen 0.13%
Gross Calorific Value 5,650 kWh/MT - 20.35 GJ/MT
Net Calorific Value 5,300 kWh/MT - 19.10 GJ/MT
Source: SP Technical Research Institute of Sweden
Note: Most combustions release energy-containing vapors which is not always realized. The lower (net) heating value takes into account only the useful heat (i.e. the heat not to be lost in the steam). The net calorific value is always less than the upper (gross calorific value). In a conventional boiler the steam leaving the system is untapped whereas the condensing boiler also utilizes a portion of the energy of the steam by allowing it to condense whereby liquefaction heat is realized.

Ash

K2O 45.01%
Na2O 15.42%
CaO 6.26%
MgO 1.32%
Fe2O3 +
AI2O3 1.39%
P2O5 4.64%
SO3 5.75%
SiO2 4.64%
Source: Jasper Guy Woodroof (1979). "Coconuts: Production, Processing, Products". 2nd ed. AVI Publishing Co. Inc.