the flue gas, to reduce the emission levels. Thus primary measures are dealing with the combustion zone and improvements to this area, while secondary measures look at the exit of combustion chamber, i.e. Primary measures are used to avoid creation of these emissions, while secondary measures remove the emissions from the exhaust gas. corrosion and fouling) To avoid emissions, both primary measures and secondary measures can be used. In addition to the three main elements: O, H and C as the major part, there are also some other minor or trace elements included in the biomass structure such as N, S, Cl and ash elements, contributing to emissions and operational problems (e.g. Thermochemical technology (including pyrolysis, gasification and combustion) is the most widely used technology to utilize biomass. To utilize biomass, the conversion pathway could be done in three different ways: thermochemical, biological and physical. It can be material that has been taken from a primary production process (chip wood from forestry) or re-claimed material (such as used, clean untreated pallets, waste …). Biomass as one of the renewable sources of energy and the only carbon containing renewable resource is known as a collective term for many different forms of combustible material derived from plant sources.
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