Properties of biofuel fly ash and capabilities of its use for agricultural needs
Laen...
Kuupäev
2019
Kättesaadav alates
Autorid
Kulokas, M.
Zaleskas, V.
Pedišius, N.
Praspaliauskas, M.
Buinevičius, K.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The use of various types of biomass for energy production provides great prospects for
reducing the consumption of fossil fuels and the negative impact on the environment. However,
the use of biomass, in particular agromass for this purpose, results in relatively large amounts of
bottom ashes and fly ashes, the composition and properties of which also raise a number of
additional environmental problems. The composition and properties of fly ash are investigated in
the paper, taking into account the possibilities of utilizing them for soil fertilization and other
applications. Fly ash samples were collected from bunkers of flue gas cleaning equipment
(electrostatic precipitator and cyclones) installed after water heating boilers, which are firing
wood chips and chuffed straw. The composition of fly ash was determined using Inductively
Coupled Plasma Optical Emission Spectrometry (ICP-OES) and Scanning Electron Microscopy
with Energy Dispersive Spectroscopy (SEM/EDS) while particle size distribution was obtained
using scattered-light aerosol spectrometer. Electrical Low Pressure Impactor (ELPI) was used to
separate fly ash into 14 groups by particle diameter, and the analysis of their composition showed
differences in the composition of the fly ash collected in cyclones and Electrostatic Precipitators
(ESP). An analysis of the composition of samples in regard to the existing heavy metals norms
and considering concentrations of elements beneficial to the growth of plants, enables to prepare
recommendations for fertilization. The determined alkalinity of fly ash pH 13 confirms the
possibility of their use for reducing soil acidity. The analysis of fly ash composition has shown
that they contain elements, important for plant growth (Ca, Mg, K, P, N, S), and their
concentrations determine the further use for soil quality improvement because the amount of these
elements in the acid soils is reduced.
Kirjeldus
Article
Märksõnad
agromass, biofuel, fly ash, chemical and physical properties, articles