One-pot transformation of lignocellulosic biomass into crude bio-oil with metal chlorides via hydrothermal and supercritical ethanol processing [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 662.7 Coke and charcoal
• Thông tin xuất bản: Oak Ridge, Tenn. : Oak Ridge, Tenn. : Oak Ridge National Laboratory ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: Article No. 121500 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 264275
• Chủ đề: 1. 09 biomass fuels; 2. Bio-oil; 3. Metal chloride; 4. Supercritical ethanol processing

Tóm tắt

 Grape seeds were deconstructed in both hydrothermal and supercritical ethanol media with a combination of two metal chlorides (TiCl<
 sub>
 4<
 /sub>
 :MgCl<
 sub>
 2<
 /sub>
 ) to produce bio-oils. The use of metal chloride additives in supercritical ethanol achieved the highest bio-oil yield of 49.2 wt% (300 �C, 30 min). Both the hydrothermal and supercritical ethanol deconstruction with the additives (TiCl<
 sub>
 4<
 /sub>
 :MgCl<
 sub>
 2<
 /sub>
  = 4 mmol:4mmol) produced the bio-oils with a higher heating value (HHV) of 35 MJ/Kg. Here, gas chromatography-mass spectrometry (GC-MS) analysis of the bio-oils showed that the major products in bio-oils from the hydrothermal deconstruction were acids while the majority products in bio-oils form the supercritical ethanol deconstruction were esters. Nuclear magnetic resonance (NMR) data of the bio-oils suggested that both hydrothermal and supercritical ethanol deconstruction with metal chlorides significantly reduced the non-condensed OH and oxygenated lignin sub-units in bio-oils
  while only supercritical ethanol deconstruction with metal chlorides reduced the aliphatic OH and O-alkylated structures in bio-oils.