A chemo-microbial hybrid process for the production of 2-pyrone-4,6-dicarboxylic acid as a promising bioplastic monomer from PET waste
- 주제(기타) Chemistry, Multidisciplinary
- 주제(기타) Green & Sustainable Science & Technology
- 설명문(일반) [Kang, Myung Jong; Lee, Min-Woo; Kim, Kyung-An; Cha, Hyun Gil] Korea Res Inst Chem Technol KRICT, Res Ctr Biobased Chem, Div Specialty & Biobased Chem Technol, Ulsan 44429, South Korea; [Kim, Hee Taek; Khang, Tae Uk; Joo, Jeong Chan] Korea Res Inst Chem Technol KRICT, Res Ctr Biobased Chem, Div Specialty & Biobased Chem Technol, Daejeon 34602, South Korea; [Song, Hye Min; Park, Si Jae] Ewha Womans Univ, Div Chem Engn & Mat Sci, Seoul 03760, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 ROYAL SOC CHEMISTRY
- 발행년도 2020
- URI http://www.dcollection.net/handler/ewha/000000169571
- 본문언어 영어
- Published As https://dx.doi.org/10.1039/d0gc00007h
초록/요약
In this study, 2-pyrone-4,6-dicarboxylic acid (PDC), a valuable monomer for bio-degradable plastics, was synthesised using terephthalic acid (TPA) derived from PET waste by a comprehensive chemo-microbial hybrid process. Depolymerisation of PET into TPA was performed via microwave-assisted hydrolysis using biomass-derived SiO2 catalysts with thiol functionalisation. The increased PET hydrolysis efficiency was investigated by reaction kinetics studies. The conversion of TPA obtained by depolymerisation of PET waste into PDC was achieved using two recombinant Escherichia coli strains expressing tphAabc and tphB genes for TPA degradation into protocatechuic acid (PCA) through 3,4-dihydroxy-cyclohexa-1,5-diene-1,4-dicarboxylic acid (DCD) (E. coli PCA strain) and using ligABC genes to convert PCA to PDC through 4-carboxy-2-hydroxymuconate semialdehyde (CHMS) (E. coli PDCPCA strain). Based on the high chemical depolymerisation of PET waste into TPA (over 97% efficiency), the double-catalyst system composed of the E. coli PCA strains with TPA degradation module and PDC synthesis module enables PET waste to be used in the PDC production platform with 96.08% of the overall efficiency.
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