Why is torrefaction used in the biomass to energy process?
Torrefaction improves the physical properties, chemical composition, and energy and storage properties of biomass. Torrefaction of biomass at 300°C increases the energy content by about 30% as compared to the raw biomass.
What do you mean by biomass torrefaction?
Torrefaction of biomass, e.g., wood or grain, is a mild form of pyrolysis at temperatures typically between 200 and 320 °C. Torrefaction changes biomass properties to provide a better fuel quality for combustion and gasification applications.
What happens during torrefaction?
Torrefaction is the slow heating of biomass in an inert or reduced environment to a maximum temperature of approximately 300°C. Torrefaction can also be defined as a group of products resulting from the partially controlled and isothermal pyrolysis of biomass occurring in a temperature range of 200–280ºC.
Which is torrefaction reaction?
Torrefaction is a thermal pretreatment process to pretreat biomass in the temperature range of 200–300 °C under an inert atmosphere. It is known that the torrefaction process strongly depends on the decomposition temperature of the lignocellulosic constituents in biomass, namely, hemicellulose, cellulose, and lignin.
How is the carbonation of biomass different from the torrefaction of biomass?
Torrefaction is a thermal decomposition that takes place at low temperature and within a narrow temperature range of 200~300℃, while carbonization is 600℃ destructive distillation process. Carbonization produces more energy dense fuel than torrefaction, but it has a much lower energy yield. 3.
Why biomass gasification is useful?
Biomass gasification allows the conversion of different biomass feedstocks to a more convenient gaseous fuel that can then be used in conventional equipment (e.g., boilers, engines, and turbines) or advanced equipment (e.g., fuel cells) for the generation of heat and electricity.
How is pyrolysis different from torrefaction?
Pyrolysis produce liquid with gas and solid, whereas torrefaction generates only gas and solid. Additionally, the proportions are not the same : around 90% of solid with torrefaction, against 10% of solid with pyrolysis (and about 70% of liquid and 10% of gas).
How is torrefaction different from pyrolysis?
What is biomass gasification process?
Biomass gasification is a mature technology pathway that uses a controlled process involving heat, steam, and oxygen to convert biomass to hydrogen and other products, without combustion.
What is biomass torrefaction?
What is Torrefaction. Biomass torrefaction is a thermal process used to produce high-grade solid biofuels from various streams of woody biomass or agro residues.
How is torrefaction degree related to biomass weight loss?
Different combinations of temperature and residence time can be used to reach a given torrefaction degree, as expressed by the weight loss [159]. On the other hand, the crucial properties of the torrefied product such as HHV and saturated moisture uptake can be correlated by the weight loss or torrefaction severity of biomass [ 132, 159]
What is the torrefaction process?
Torrefaction is an upgrading process of biomass for other energy generation processes like direct combustion on an industrial scale. Torrefaction is the thermal degradation of organic biomass in an inert or nitrogen atmosphere, one atmosphere pressure and temperature in the range of 200–300°C, for several hours depending on the biomass [24].
What affects the torrefaction of lignocellulosic biomass?
The torrefaction of lignocellulosic biomass is significantly affected by these three basic components. Generally, the motives of torrefaction are to remove light VM in biomass which is mostly contained in hemicellulose and part of cellulose, and generate higher energy density products.