| Project/Area Number |
06555235
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
反応・分離工学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HASHIMOTO Kenji Kyoto Univ., Grad.School of Eng.Professor, 工学研究科, 教授 (20025919)
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| Co-Investigator(Kenkyū-buntansha) |
KUWAHARA Hiroshi Sanwakakoh Ltd.R&D Researcher, 開発本部, 研究員
MUKAI Shin Kyoto Univ., Grad.School of Eng.Instructor, 工学研究科, 助手 (70243045)
KAWASE Motoaki Kyoto Univ., Grad.School of Eng..Instructor, 工学研究科, 助手 (60231271)
MASUDA Takao Kyoto Univ., Grad.School of Eng.Associate Professor, 工学研究科, 助教授 (20165715)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥18,500,000 (Direct Cost: ¥18,500,000)
Fiscal Year 1995: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1994: ¥14,600,000 (Direct Cost: ¥14,600,000)
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| Keywords | Waste plastics / Chemical recycling / Pyrolysis / Catalytic cracking / Trickle bed type reactor / Gasoline / Zeolite catalyst / Steam / 脱塩素 / ポリエチレン / PVC / PET / 固体触媒 |
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| Research Abstract |
Increasing amount of waste plastics which causes serious pollution problem is a cheap and abundant source of chemicals and energy. The chemical recycling method, which converts waste plastics to useful hydrocarbons, such as gasoline, was recognized as a useful approach. The representative waste plastics are polyolefin, polysyrene (PS), polyethylene terephthalate (PET) and polyvinyl chloride (PVC). The main objective of this work is to recover useful hydrocarbons from these waste plastics. PS can be easily recycled, whereas it is difficult to recover valuable chemicals of high yeild from other plastics. Hence, we researched the chemical recycling of the remaining plastics, and got the following results :
1. PET was succeeded to be degraded to monomers in steam atmosphere without any carbonaceous residue. Furthermore, using iron oxide catalyst, produced terephthalic acid could be converted to benzene and toluene.
2. PVC was completely dechlorinated in the temperature range of 573 to 653 K in each of nitrogen or steam atmosphere.
3. Polyethylene (PE), which is one of polyolefins, could be degraded above 773 K.
4. Trickle bed type reactor was developed for the decomposition of waste plastics. This reactor enables to achieve a good contact between melted plastics and carrier gas.
5. Nickel supported rare-earth metal exchanged Y-type zeolite (Ni/REY) was newly developed, which could crack heavy oil produced by the decomposition of plastics, yielding high quality gasoline in steam atmosphere.
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