Impact of using additives on quality of agricultural biomass pellets
2018
Gageanu, I., National Inst. of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest (Romania) | Cujbescu, D., National Inst. of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest (Romania) | Persu, C., National Inst. of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest (Romania) | Voicu, G., University Politehnica of Bucharest (Romania)
The benefits of biofuels, compared to traditional fuels, target higher energy security, lower environmental impact, financial savings and socio-economic benefits related to the rural sector. The concept of sustainable development embodies the idea of inter-connectivity and balance between economic, social and environmental concerns. Materials with lignocellulosic structure (wood, straws, stalks, etc.) represent important renewable energy resources. Their main disadvantage consists in the fact that they have very low bulk density, which leads to difficulties in the process of handling, transport, storage, respectively increased production costs. Besides this, high variations of moisture in the material can generate difficulties in the operation and adjustment of processes within the installations where they are used. These drawbacks can be improved by drying and densifying the material at very high pressures, thus obtaining solid biofuels with a uniform structure, such as pellets. Quality attributes of pellets can be influenced by using different additives and binders in the production process. Changes in the recipes used can lead to increased yields and also to improved product quality (in terms of density, inferior calorific value, durability, etc.). The paper presents a series of experimental researches conducted on pellets obtained from agricultural biomass, with and without using additives in the recipes, determining the influence of these additives on the quality of pellets used for energy purposes.
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