Identify the correct sequence of biomass fuels in terms of their energy content per unit mass
Coconut Shells > Dung(dry) > Unsorted domestic refuse
To determine the sequence of biomass fuels in terms of their energy content per unit mass, we need to understand the typical energy values associated with the different biomass materials mentioned: Coconut Shells, Dung (dry), and Unsorted Domestic Refuse.
- Coconut Shells: Coconut shells are known to have a high calorific value compared to other biomass fuels. They typically have an energy content ranging between 18 to 20 MJ/kg. This makes coconut shells a potent biomass material in terms of energy content.
- Dung (dry): Dried dung generally has a moderate calorific value. It is less efficient than coconut shells, with an energy range usually between 12 to 16 MJ/kg, depending on the type of animal and the dryness of the dung.
- Unsorted Domestic Refuse: This type of biomass fuel is a mixture of various wastes, and its calorific value can vary widely. On average, it is lower than both coconut shells and dried dung, typically under 10 MJ/kg. This variability and lower energy content make it the least efficient among the given options when considering energy per unit mass.
Based on these values, the correct sequence of biomass fuels in terms of their energy content per unit mass from highest to lowest is:
- Coconut Shells > Dung (dry) > Unsorted Domestic Refuse
Hence, the correct answer is the option stating Coconut Shells > Dung(dry) > Unsorted domestic refuse.
By understanding the typical energy contents, one can assess and compare the fuel efficiency of different biomass materials, crucial for applications in energy production and environmental management.
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