Abstract
In order to decrease Cl content in waste plastics, dry density float-sink separation of Cl-contained and Cl-free plastics was explored using a semi-continuous rotating-type gas-solid fluidized bed separator with silica sand. The separator has two distinctive features: (1) the plastics can be fed at a middle height of the sand bed, and (2) when the plastics are recovered with the sand from a container after the float-sink, the recovery height of the sand bed can be changed to designate the plastics as floaters or sinkers. The waste plastics of Cl content = 5.4 wt% were used in this study. The separation was investigated by changing the experimental conditions. As a result, the float-sink of the plastics was affected by the air velocity for fluidization, the float-sink time and the feed amount of plastics. The possible causes of the effects were discussed by focusing on the apparent density of fluidized bed, the fluidization intensity, the size segregation of fluidized particle, the shape of the plastics, and the interactions between the plastics during the float-sink. When the recovery height was changed at the adjusted conditions, the Cl content in the floaters was successfully decreased to be 0.4-0.85 wt%, at which the recovery of the Cl-free plastics was 40-60%.
| Original language | English |
|---|---|
| Pages (from-to) | 69-74 |
| Number of pages | 6 |
| Journal | Advanced Powder Technology |
| Volume | 21 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2010 |
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Keywords
- Chlorine content
- Dry density separation
- Fluidized bed
- Plastic shape
- Waste plastic treatment
ASJC Scopus subject areas
- Chemical Engineering(all)
- Mechanics of Materials
Cite this
Decrease of Cl contents in waste plastics using a gas-solid fluidized bed separator. / Yoshida, Mikio; Nakatsukasa, Shingo; Nanba, Masaaki; Gotoh, Kuniaki; Zushi, Tatsuya; Kubo, Yasuo; Oshitani, Jun.
In: Advanced Powder Technology, Vol. 21, No. 1, 01.2010, p. 69-74.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Decrease of Cl contents in waste plastics using a gas-solid fluidized bed separator
AU - Yoshida, Mikio
AU - Nakatsukasa, Shingo
AU - Nanba, Masaaki
AU - Gotoh, Kuniaki
AU - Zushi, Tatsuya
AU - Kubo, Yasuo
AU - Oshitani, Jun
PY - 2010/1
Y1 - 2010/1
N2 - In order to decrease Cl content in waste plastics, dry density float-sink separation of Cl-contained and Cl-free plastics was explored using a semi-continuous rotating-type gas-solid fluidized bed separator with silica sand. The separator has two distinctive features: (1) the plastics can be fed at a middle height of the sand bed, and (2) when the plastics are recovered with the sand from a container after the float-sink, the recovery height of the sand bed can be changed to designate the plastics as floaters or sinkers. The waste plastics of Cl content = 5.4 wt% were used in this study. The separation was investigated by changing the experimental conditions. As a result, the float-sink of the plastics was affected by the air velocity for fluidization, the float-sink time and the feed amount of plastics. The possible causes of the effects were discussed by focusing on the apparent density of fluidized bed, the fluidization intensity, the size segregation of fluidized particle, the shape of the plastics, and the interactions between the plastics during the float-sink. When the recovery height was changed at the adjusted conditions, the Cl content in the floaters was successfully decreased to be 0.4-0.85 wt%, at which the recovery of the Cl-free plastics was 40-60%.
AB - In order to decrease Cl content in waste plastics, dry density float-sink separation of Cl-contained and Cl-free plastics was explored using a semi-continuous rotating-type gas-solid fluidized bed separator with silica sand. The separator has two distinctive features: (1) the plastics can be fed at a middle height of the sand bed, and (2) when the plastics are recovered with the sand from a container after the float-sink, the recovery height of the sand bed can be changed to designate the plastics as floaters or sinkers. The waste plastics of Cl content = 5.4 wt% were used in this study. The separation was investigated by changing the experimental conditions. As a result, the float-sink of the plastics was affected by the air velocity for fluidization, the float-sink time and the feed amount of plastics. The possible causes of the effects were discussed by focusing on the apparent density of fluidized bed, the fluidization intensity, the size segregation of fluidized particle, the shape of the plastics, and the interactions between the plastics during the float-sink. When the recovery height was changed at the adjusted conditions, the Cl content in the floaters was successfully decreased to be 0.4-0.85 wt%, at which the recovery of the Cl-free plastics was 40-60%.
KW - Chlorine content
KW - Dry density separation
KW - Fluidized bed
KW - Plastic shape
KW - Waste plastic treatment
UR - http://www.scopus.com/inward/record.url?scp=74549179643&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=74549179643&partnerID=8YFLogxK
U2 - 10.1016/j.apt.2009.11.002
DO - 10.1016/j.apt.2009.11.002
M3 - Article
VL - 21
SP - 69
EP - 74
JO - Advanced Powder Technology
JF - Advanced Powder Technology
SN - 0921-8831
IS - 1
ER -