А fuel index usage for evaluating the fitness of new types of granulated biofuels biofuels

Issue 24(1) 2019
Pages 49-55

R.L. Isemin1, D.V. Klimov2, A.V. Michalev2, O.Yu. Milovanov1, V.S. Kogh-Tatarenko1

1Tambov State Technical University
2Clean Energy Ltd

Keywords: biofuel, annealing, fuel index

Biomass is considered as CO2 - a neutral fuel, because when it is combusted, the same amount of carbon dioxide is released, which the plant absorbed while it grows, which generally provides zero emissions of carbon dioxide into the atmosphere. Biomass also includes many types of bio-waste, including agricultural waste, which processing and utilization allows to solve important environmental, economic and social problems. At the same time, the combustion process is associated with a number of problems caused by the low ash melting point, emissions of dust and ash particles, etc. It is important to assess the likelihood of these problems occurring without biomass burning experiments conducting. For these purposes, fuel indices were calculated according to the chemical composition analysis, which allow predicting the processes of micronutrient emission, ash melting with the slag agglomerates formation, and also the boiler surfaces corrosion during the combustion of three types of biofuel (pellets from straw, sunflower husk and poultry litter). Both “raw” granules and annealed granules (treated in an oxygen-free medium at 250 °C) were subjected to the analysis. Fuel indices analysis showed that biofuel produced from the poultry litter is the most suitable for use, provided that it is disinfected, which can be achieved in the process of biofuel annealing.