期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 86, 期 -, 页码 67-75出版社
ELSEVIER
DOI: 10.1016/j.supflu.2013.11.022
关键词
Lignin; LignoBoost; Catalytic conversion; Hydrothermal conversion; Bio-oil; Near-critical water
资金
- Chalmers Energy Initiative - LignoFuel Project
- Metso Power AB
- Swedish Energy Agency
- Angpanneforenings Forskningsstiftelse
A high-pressure pilot plant was developed to study the conversion of LignoBoost Kraft lignin into bio-oil and chemicals in near-critical water (350 degrees C, 25 MPa). The conversion takes place in a continuous fixed-bed catalytic reactor (500 cm(3)) filled with ZrO2 pellets. Lignin (mass fraction of approximately 5.5%) is dispersed in an aqueous solution containing K2CO3 (from 0.4% to 2.2%) and phenol (approximately 4.1%). The feed flow rate is 1 kg/h (reactor residence time 11 min) and the reaction mixture is recirculated internally at a rate of approximately 10 kg/h. The products consist of an aqueous phase, containing phenolic chemicals, and a bio-oil, showing an increased heat value (32 MJ/kg) with respect to the lignin feed. The 1-ring aromatic compounds produced in the process are mainly anisoles, alkylphenols, guaiacols and catechols: their overall yield increases from 17% to 27% (dry lignin basis) as K2CO3 is increased. (C) 2013 Elsevier B.V. All rights reserved.
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