Valorization of paper mill sludge using protic ionic liquids and deep eutectic solvents as a potential feedstock for biorefineries

SEMERCİ N. I., Unal B., Simsek N., Ozcan S. E.

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, cilt.42, sa.4, ss.274-285, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 4
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1080/02773813.2022.2085746
  • Dergi Adı: JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.274-285
  • Anahtar Kelimeler: Paper mill sludge, protic ionic liquid, deep eutectic solvent, cellulose, demineralization, PULP, PRETREATMENT, CELLULOSE, ACID, PYROLYSIS, HYDROGEN, LIGNIN, HEMICELLULOSE, FERMENTATION, BIOETHANOL
  • Ankara Üniversitesi Adresli: Evet

Özet

In this article, protic ionic liquids (PILs) and deep eutectic solvent (DESs) were explored to enrich the cellulose content of a paper mill sludge (PMS) received from a sanitary paper manufacturing plant. Compositional, morphological, physico-chemical, and thermal decomposition features of PMS were monitored using XRF, SEM, FTIR, XRD, and TGA. Triethylammonium hydrogen sulfate (TEAHSO(4)), which functioned selectively for the elimination of mineralogical content and cellulose enrichment of PMS, enhanced the cellulose content of the material from 45% to 74% following the pretreatment at 150 degrees C. Though DESs such as choline chloride-urea behaved poorly toward demineralization relative to PILs, they preserved cellulose effectively in the structure and gave satisfactory saccharification yields that reached over 90%. In addition to integrating the sustainable benefits of PILs and DESs into the valorization of PMS for the first time in literature, this work highlighted the competency of PMS as a cellulose-rich feedstock for biorefinery applications.