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Chemical recycling of waste Poly Vinyl Chloride (PVC) by the liquid-phase treatment

  • SPECIAL FEATURE: ORIGINAL ARTICLE
  • 6th 3R International Scientific Conference (6th 3RINCs 2020)
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Abstract

Liquid-phase treatment of waste Poly Vinyl Chloride (PVC) was performed. Chlorine change rate was high when using alcohol, cresol and terpene compared with that observed in the treatment without solvent, so the importance of solvent for dechlorination from PVC was confirmed. By the treatment in alcohol, generation of porous structure was confirmed, which were not observed in the treatment of PVC alone. We were able to propose a method of utilizing carbon resources after chlorine is removed from a different perspective than previous reports. The number of pores and pore size were controlled by adding CO2 gas and basic compound, especially Na2CO3 in 1-Butanol. It indicated that these elements were effective for the production of porous structure based on the liquid-phase treatment. On the other hand, solubilization rate reached near 90% by using terpene at 300 °C in air atmosphere. The most effective solvent for solubilization was o-Cresol and solubilization rate reached to 99.8% at 250 °C in air atmosphere. This result indicates that PVC can be completely decomposed by these solvents in the presence of oxygen. From this research, it is possible to utilize and decompose solid residue by selecting the conditions.

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Authors and Affiliations

  1. Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan

    Kazushi Nozue & Hideyuki Tagaya

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  1. Kazushi Nozue
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  2. Hideyuki Tagaya
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Correspondence to Hideyuki Tagaya.

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10163_2020_1153_MOESM1_ESM.pdf

Fig.S1 (a) FT - IR spectrum, (b) TG curve of the solid residue after the treatment of PVC alone at 230 °C for 2 h (PDF 226 KB)

Fig.S2 TG curves of the solid residue after the treatment in (a) 1-Propanol, (b) 1-Hexanol, (c) Linalool (pdf 721 KB)

10163_2020_1153_MOESM3_ESM.pdf

Fig.S3 TG curves of the solid residue after the treatment in alcohol at 200 °C. (a) 1-Propanol, (b) 1-Butanol, (c) 1-Heptanol, (d) 1-Decanol (pdf 719 KB)

10163_2020_1153_MOESM4_ESM.pdf

Fig.S4 SEM images of the solid residue after the treatment in (a) 1-Propanol, (b) 1-Butanol (Small material size), (c) 1-Pentanol, (d) 1-Hexanol, (e) 1-Heptanol, (f) 1-Octanol and (g) shows the digitization for images Fig.9b-I, c, Fig.S5b-I, c–e-I, f-I, *(b) (I): One side, (II): The other side, *(e) (I): One side, (II): The other side, *(f) (I): One side, (II): The other side (pdf 1536 KB)

10163_2020_1153_MOESM5_ESM.pdf

Fig.S5 SEM images of the solid residue after the treatment in various conditions. (a) 1-Butanol + CO2, (b) 1-Decanol + CO2, (c) 1-Butanol + NaHCO3 (0.3eq), (d) 1-Decanol + NaHCO3 (0.3eq), (e) 1-Butanol + Na2CO3(0.3eq), (f) 1-Decanol + Na2CO3 (0.3eq), *(c) (I): One side, (II): The other side, *(d): (I): Part of production of pore, (II): One side, (III) The other side (pdf 1227 KB)

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Nozue, K., Tagaya, H. Chemical recycling of waste Poly Vinyl Chloride (PVC) by the liquid-phase treatment. J Mater Cycles Waste Manag 23, 489–504 (2021). https://doi.org/10.1007/s10163-020-01153-9

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  • DOI: https://doi.org/10.1007/s10163-020-01153-9

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