Burning of Gasified Charcoal Dust Briquettes




Wood charcoal is a major source of fuel in developing countries. However, in the process of manufacture, transportation, storage and use a considerable amount of this charcoal break and disintegrate into smaller particles and dust in which case most at times these particles and dust are thrown away as waste. These can however be avoided by putting them to use in the form of briquettes using any suitable material binder) to hold the solid material together. There are several ways in which wood charcoal is made. One of them is through burning wood in a gasifier jiko which gives gasified charcoal. When grinded or breaks itself  during the processes of manufacture, transportation storage and use, the particles and dust formed are then used to made gasified charcoal briquettes


In this study, indoor concentration of carbon monoxide and particulate emitted from combustion of these gasified charcoal dust briquettes in household were measured. The study involved burning them under the standard water boiling test protocol (WBT) by performing the cold start power, the hot start power and the simmer tests. These are simplified simulations of the coking process in a household kitchen. The obtained results were entered into water boiling test data calculating sheet to obtain al the critical parameters in evaluating and discerning burning of the briquettes.


In the burning process, a significant amount of emissions was indicated, both gaseous and particulates. The CO concentration resulting from the use of these of briquettes was a bit reduced compared to that resulting from wood. Although reduced, it still exceeded the world health organization (WHO) guideline of 10 ppm. In terms of energy value, the calorific value of the gasified charcoal dust briquettes was lower than of wood and wood charcoal.


It was then concluded that for effective burning and use of this kind of briquettes is through adoption and sustained use of improved cook stoves. These will also lead to reduced pollution and effects caused by such air pollution.

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