The Experts below are selected from a list of 540816 Experts worldwide ranked by ideXlab platform
Ulrik B. Henriksen - One of the best experts on this subject based on the ideXlab platform.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips—Process Optimization and Pellet Quality
BioEnergy Research, 2014Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips: Process Optimization and Pellet Quality
Bioenergy Research, 2013Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
Lei Shang - One of the best experts on this subject based on the ideXlab platform.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips—Process Optimization and Pellet Quality
BioEnergy Research, 2014Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips: Process Optimization and Pellet Quality
Bioenergy Research, 2013Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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quality effects caused by torrefaction of Pellets made from scots pine
Fuel Processing Technology, 2012Co-Authors: Lei Shang, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Jonas Dahl, Niels Nielsen, Tobias Pape Thomsen, Ulrik Birk HenriksenAbstract:Abstract The purpose of the study was to investigate the influence of torrefaction on the quality of Scots pine Pellets. Pellet samples were torrefied at 230, 250 and 270 °C for 1 h in nitrogen atmosphere. Higher heating value (HHV) was increased from 18.37 MJ kg − 1 to 24.34 MJ kg − 1 . The energy to crush a Pellet by mechanical compression was determined using a material tester and results showed a rapid decrease before torrefaction temperature reached 250 °C. Slightly further decrease was observed when increasing the temperature up to 270 °C. The strength loss was confirmed by determining the energy required for grinding the Pellet samples in a bench scale disc mill. Particle size distribution measurements after grinding indicated a significant increase of small particles (diameter ca. 2 mm). To further analyze the effect on strength, the mechanical durability of Pellets was tested according to wood Pellet standards, EN 15210-1. The results have shown a good correlation between Pellet durability and compression strength, and indicated that the Pellet durability can be estimated based on compression strength data of about 25 Pellets.
Jonas Dahl - One of the best experts on this subject based on the ideXlab platform.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips—Process Optimization and Pellet Quality
BioEnergy Research, 2014Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips: Process Optimization and Pellet Quality
Bioenergy Research, 2013Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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quality effects caused by torrefaction of Pellets made from scots pine
Fuel Processing Technology, 2012Co-Authors: Lei Shang, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Jonas Dahl, Niels Nielsen, Tobias Pape Thomsen, Ulrik Birk HenriksenAbstract:Abstract The purpose of the study was to investigate the influence of torrefaction on the quality of Scots pine Pellets. Pellet samples were torrefied at 230, 250 and 270 °C for 1 h in nitrogen atmosphere. Higher heating value (HHV) was increased from 18.37 MJ kg − 1 to 24.34 MJ kg − 1 . The energy to crush a Pellet by mechanical compression was determined using a material tester and results showed a rapid decrease before torrefaction temperature reached 250 °C. Slightly further decrease was observed when increasing the temperature up to 270 °C. The strength loss was confirmed by determining the energy required for grinding the Pellet samples in a bench scale disc mill. Particle size distribution measurements after grinding indicated a significant increase of small particles (diameter ca. 2 mm). To further analyze the effect on strength, the mechanical durability of Pellets was tested according to wood Pellet standards, EN 15210-1. The results have shown a good correlation between Pellet durability and compression strength, and indicated that the Pellet durability can be estimated based on compression strength data of about 25 Pellets.
Jens Kai Holm - One of the best experts on this subject based on the ideXlab platform.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips—Process Optimization and Pellet Quality
BioEnergy Research, 2014Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips: Process Optimization and Pellet Quality
Bioenergy Research, 2013Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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quality effects caused by torrefaction of Pellets made from scots pine
Fuel Processing Technology, 2012Co-Authors: Lei Shang, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Jonas Dahl, Niels Nielsen, Tobias Pape Thomsen, Ulrik Birk HenriksenAbstract:Abstract The purpose of the study was to investigate the influence of torrefaction on the quality of Scots pine Pellets. Pellet samples were torrefied at 230, 250 and 270 °C for 1 h in nitrogen atmosphere. Higher heating value (HHV) was increased from 18.37 MJ kg − 1 to 24.34 MJ kg − 1 . The energy to crush a Pellet by mechanical compression was determined using a material tester and results showed a rapid decrease before torrefaction temperature reached 250 °C. Slightly further decrease was observed when increasing the temperature up to 270 °C. The strength loss was confirmed by determining the energy required for grinding the Pellet samples in a bench scale disc mill. Particle size distribution measurements after grinding indicated a significant increase of small particles (diameter ca. 2 mm). To further analyze the effect on strength, the mechanical durability of Pellets was tested according to wood Pellet standards, EN 15210-1. The results have shown a good correlation between Pellet durability and compression strength, and indicated that the Pellet durability can be estimated based on compression strength data of about 25 Pellets.
Jesper Ahrenfeldt - One of the best experts on this subject based on the ideXlab platform.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips—Process Optimization and Pellet Quality
BioEnergy Research, 2014Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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Lab and Bench-Scale Pelletization of Torrefied Wood Chips: Process Optimization and Pellet Quality
Bioenergy Research, 2013Co-Authors: Lei Shang, Niels Peter K. Nielsen, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Maria Puig Arnavat, Lars S. Bach, Jonas Dahl, Ulrik B. HenriksenAbstract:Combined torrefaction and Pelletization is used to increase the fuel value of biomass by increasing its energy density and improving its handling and combustion properties. In the present study, a single-Pellet press tool was used to screen for the effects of Pellet die temperature, moisture content, additive addition, and the degree of torrefaction on the Pelletizing properties and Pellet quality, i.e., density, static friction, and Pellet strength. Results were compared with Pellet production using a bench-scale Pelletizer. The results indicate that friction is the key factor when scaling up from single-Pellet press to bench-scale Pelletizer. Tuning moisture content or increasing the die temperature did not ease the Pellet production of torrefied wood chips significantly. The addition of rapeseed oil as a lubricant reduced the static friction by half and stabilized Pellet production; however, the Pellet quality, strength, and density were negatively affected. The Pellets produced from pine wood torrefied at 250 and 280 °C were shorter than Pellets produced from untreated wood and their quality did not match conventional wood Pellet standards. However, the heating value of the torrefied Pellets was higher and the particle size distribution after grinding the Pellets was more uniform compared to conventional wood Pellets.
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quality effects caused by torrefaction of Pellets made from scots pine
Fuel Processing Technology, 2012Co-Authors: Lei Shang, Wolfgang Stelte, Jesper Ahrenfeldt, Jens Kai Holm, Jonas Dahl, Niels Nielsen, Tobias Pape Thomsen, Ulrik Birk HenriksenAbstract:Abstract The purpose of the study was to investigate the influence of torrefaction on the quality of Scots pine Pellets. Pellet samples were torrefied at 230, 250 and 270 °C for 1 h in nitrogen atmosphere. Higher heating value (HHV) was increased from 18.37 MJ kg − 1 to 24.34 MJ kg − 1 . The energy to crush a Pellet by mechanical compression was determined using a material tester and results showed a rapid decrease before torrefaction temperature reached 250 °C. Slightly further decrease was observed when increasing the temperature up to 270 °C. The strength loss was confirmed by determining the energy required for grinding the Pellet samples in a bench scale disc mill. Particle size distribution measurements after grinding indicated a significant increase of small particles (diameter ca. 2 mm). To further analyze the effect on strength, the mechanical durability of Pellets was tested according to wood Pellet standards, EN 15210-1. The results have shown a good correlation between Pellet durability and compression strength, and indicated that the Pellet durability can be estimated based on compression strength data of about 25 Pellets.
