Supercritical extraction of biomass as an effective pretreatment step for the char yield control in pyrolysis

Trubetskaya A., Budarin V., Arshadi M., Magalhães D., KAZANÇ ÖZERİNÇ F., Hunt A. J.

Renewable Energy, cilt.170, ss.107-117, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 170
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.renene.2021.01.116
  • Dergi Adı: Renewable Energy
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Compendex, Environment Index, Geobase, Greenfile, Index Islamicus, INSPEC, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.107-117
  • Anahtar Kelimeler: Supercritical extraction, Char yield, Scots pine, Heating rate, Fluidisation, PINUS-SYLVESTRIS, CHEMICAL-COMPOSITION, DEVOLATILIZATION KINETICS, LIPOPHILIC EXTRACTIVES, SOLID RESIDUES, WOOD, FRACTIONS, BEHAVIOR, NEEDLES, SPRUCE
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

© 2021 The Author(s)This work demonstrates that the coupling of supercritical carbon dioxide extraction with pyrolysis is an effective method for the removal of extractives from forestry residues and generation of solid char with different properties from the remaining solid wood fractions. Extraction of the needles and stumps shows greater yields of resin acids, terpenes, steroids and other derivatives than that of pinewood bark, cones and branches. The char yields of both non-treated and scCO2 extracted wood fractions varied from approximately 17.5 to 38.5 wt. % on dry basis at fast heating rates. The catalytic effect of extractives is significant on the yields and morphology of solid chars in fast pyrolysis and less pronounced at slow heating rates. These results are promising as they show that both the composition and location of extractives inclusions in the interior of wood particle can affect the morphology of char samples. Moreover, the impact of alkali metals on the wood devolatilization appears to be less compared to the lignocellulosic composition in slow pyrolysis. These results demonstrate that supercritical carbon dioxide extraction can be integrated in biorefinery as a pretreatment step to control the properties of pyrolysis products by varying the heating rate.