Abstract
The paper aims to use the waste of sun-flower hulls in order to obtain some lignocellulosic briquettes as renewable solid fuels. First, the sunflower seed husks were ground, after that they were sorted and only the fractions corresponding to the briquettes and pellets were used. After obtaining the stable briquettes there were determined the physical and caloric properties of briquettes manufactured from sunflower husks, as potential alternative biofuels. The moisture content, ash content and density of the briquettes have been determined and correlated with their calorific properties, namely the calorific value and calorific density. The experimental results have indicated that, even if the self-adhesion of sunflower seed hulls is less than that of wood sawdust, they have a better behaviour in humid environment. Good results make it possible to use these briquettes for both household heating systems and thermal power plants
Highlights
Nowadays there is an impinging potential crisis of fossil fuels, as research shows a shortage for oil and coal in the 50 – 60 years [1,2]
Wood that traditionally was used as energy source since ancient times is currently under regulation, as most of countries from the European Union are concerned with the preserving of the natural forest biotopes [2]
Biomass is a renewable energetic source, because it increases from one year to another, it is widely spread world-wide and presents low costs in comparison to the fossil fuels, the biomass resources, from which fuel material is produced may include wood and wooden wastes, agricultural cereals and wastes resulted from their production, aquatic biomass and algae [12,15]
Summary
Nowadays there is an impinging potential crisis of fossil fuels, as research shows a shortage for oil and coal in the 50 – 60 years [1,2]. Wood that traditionally was used as energy source since ancient times is currently under regulation, as most of countries from the European Union are concerned with the preserving of the natural forest biotopes [2]. Due to these regulations imposed at national level, even inferior quality wood (obtained from branches and boughs), becomes less available [3,4]. The main uses of sunflower seed shelling are in the briquettes and pellets field, and in the lignocellulose composites They are reported to combust with minimal emissions of volatile organic compounds in the atmosphere, making them useful as an alternative ecologic fuel
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