Torrefied Biomass Size for Combustion in Existing Boilers

Panahi, Aidin; Tarakçıoğlu, Mahmut Cem; Levendis, Yiannis A.

doi:10.31224/osf.io/42hg7

Cited by 2 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Upon reaching the final temperature, each sample was treated at constant conditions for 30 min. All torrefied biomass fuels were air-dried, chopped in a household blender, and size classified by sieving to obtain size cuts of (212-300 µm) based on the findings of previous study in this laboratory [23,24]. In a different study [25], it was observed that the torrefaction process reduced the particle aspect ratios and enhanced the uniformity of particle sizes.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

Oxy-combustion Behavior of Torrefied Biomass Particles

Panahi¹,

Toole²,

Yang³

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

A fundamental investigation was conducted on the combustion characteristics of torrefied biomass in both air and O2/CO2 gases containing 21% or 30% oxygen mole fractions. These gases simulated oxy-combustion environments. The targeted torrefied biomass types were waste crops, both herbaceous and woody. The experimental setup that was used in this investigation consisted of a drop-tube furnace, operated at a wall temperature of 1400 K, a high-speed high-resolution camera. Entire luminous particle combustion profiles of single particles were recorded by means of highspeed high-resolution cinematography. Combustion of these particles took place in two phases. Initially, volatiles evolved and burned in spherical/ellipsoidal envelope flames; then, upon extinction of these flames, char residues ignited and burned. Replacing air as the furnace background gas with 21%O2-79%CO2 reduced the luminosity of flame and the lengthened the burnout times; and increasing the oxygen mole fraction further to 30% increased the luminosity of the flame and shortened the burnout times.

show abstract

Section: Preparation Of Samplesmentioning

confidence: 99%

Oxy-combustion Behavior of Torrefied Biomass Particles

Panahi¹,

Toole²,

Yang³

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…All torrefied biomass fuels were air-dried, chopped in a household blender, and size classified by sieving to obtain size cuts of (212-300 µm). This size was selected to minimize the grinding costs, based on the findings of a previous study in this laboratory [53,54]. The pretreated fuels can be seen in Fig.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

Oxy-combustion behavior of torrefied biomass particles

Toole¹

View full text Add to dashboard Cite

A fundamental investigation was conducted on the combustion characteristics of torrefied biomass in both air and simulated oxy-combustion conditions containing 21% or 30% oxygen mole fractions in a carbon dioxide balance. The targeted torrefied biomass types were herbaceous, waste crop, and woody. The experimental setup that was used in this investigation consisted of a droptube furnace, operated at a wall temperature of 1400 K coupled to an optical pyrometer and a highspeed high-resolution camera. Entire luminous particle combustion profiles of single particles were recorded pyrometrically and cinematographically. Combustion of these particles took place in two phases. Initially, volatiles evolved and burned in spherical envelope flames; then, upon extinction of these flames, char residues ignited and burned. Replacing the background gas from air to an oxy-fuel atmosphere, at 21% O2 reduced the luminosity of flame; reduced the particle combustion temperatures and prolonged their burnout times. Increasing the oxygen mole fraction in CO2 to 30% increased the luminosity of the flame. For each biomass sample, the necessary oxygen concentration that would produce combustion temperature and time parameters most similar to those encountered in air combustion was determined through experiments at lower and upper thresholds. A correlation was derived for exploratory predictions of the oxygen level requirement for effective oxy-combustion of a fuel, based on its physical and chemical properties.Accurate experimental determination of this level is still necessary to minimize the amount of the oxygen that needs to be supplied by an air-separation unit in order to reduce the energy consumption penalty associated with this process.

show abstract

Torrefied Biomass Size for Combustion in Existing Boilers

Cited by 2 publications

References 31 publications

Oxy-combustion Behavior of Torrefied Biomass Particles

Oxy-combustion Behavior of Torrefied Biomass Particles

Oxy-combustion behavior of torrefied biomass particles

Contact Info

Product

Resources

About