Abstract
Present trends in the global energy sector effectively drive the development of technologies using renewable energy sources and the improvement of combustion technology towards increasing its efficiency and removing environmentally harmful flue gases. One solution is to replace fossil energy sources with renewable sources, including biomass. The degree of biomass utilization depends on the size of resources and processing technology. There are more and more different types of biomass on the market. There are many technologies for its energetic use. In recent years, fluidized combustion technology has been considered as one of the main directions of development of professional energy in the world. Many units in the world in fluidized combustion technology use as primary or supplementary fuel: sludge, wood waste and biomass, as well as municipal waste, etc. Fluidized bed boilers also allow the implementation of the dynamically developing oxy-combustion technology, which perfectly fits the prevailing trends due to the key advantages of increased energy conversion, as well as the possibility of direct sequestration of carbon dioxide. During experimental research, the mass loss of biomass pellets of various origins was analyzed in an oxidizing and inert atmosphere in a two-phase flow with the use of inert material. The obtained results allow to state that the large variety of biomass offered by suppliers requires a thorough knowledge of its properties and determination of its impact on the process and installations when used in the power industry.
Highlights
Growing concerns on the greenhouse gas emissions and their potential impact on climate change demand the application of CO2 capture and storage (CCS) technologies to large point anthropogenic CO2 emission sources such as coal and natural gas fired power plants and the implementation of CO2 negative combustion technologies such as Bio-energy with Carbon Capture and Storage (BECCS) with in the decades. [1,2]
Increasing the value of the stream of inert material caused a reduction of the combustion time by about 10%
Biomass is a source of energy characterized by dispersion and different fuel properties compared to fossil fuels, among which there should be mention of lower calorific value and high moisture content
Summary
Growing concerns on the greenhouse gas emissions and their potential impact on climate change demand the application of CO2 capture and storage (CCS) technologies to large point anthropogenic CO2 emission sources such as coal and natural gas fired power plants and the implementation of CO2 negative combustion technologies such as Bio-energy with Carbon Capture and Storage (BECCS) with in the decades. [1,2]. The main objective of their study was to investigate the pollutant emissions of the co-firing of biomass with coal under oxyfuel combustion conditions experiments firing only the biomass fuels were carried out for comparison purposes They observed lower NO emissions in the oxy-fuel atmosphere compared with those with air combustion. The objective of the work [1] was oxy-fuel combustion of biomass fuels firing three kind of biomass fuels, two non-woody (miscanthus and straw) and one woody (wood), in a 20 kWth bubbling fluidized bed (BFB) combustor, studying the effects of the combustion atmosphere (air and oxy-fuel) and the oxygen concentration in the oxy-fuel oxidant on the gas emissions and temperature profiles.
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