Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 113, Issue -, Pages 27-34Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2014.09.028
Keywords
Fast pyrolysis; Bio-oil; Magnesium; Recombination; Inorganic distribution; Aromatic hydrocarbons
Funding
- Korea Forest Service [S111313L010110]
- National Research Foundation (NRF) - Ministry of Education, Science and Technology, Republic of Korea [2013R1A2A2A01011112]
- Korea Forest Service [S111313L010110] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2013R1A2A2A01011112] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Fast pyrolysis of yellow poplar impregnated with different concentrations of MgCl2 was carried out at 450, 500, and 550 degrees C to investigate the effects of magnesium on the characteristics of the pyrolytic products. Analysis of the physicochemical properties of bio-oil, bio-char, and non-condensed pyrolytic compounds was carried out accordingly. The results indicate that the yield of char as well as some physicochemical properties of the bio-oil was influenced by the magnesium concentration. The water content increased due to a dehydration reaction induced by magnesium. Additionally, the viscosity significantly increased from 45 cSt to 216 cSt as the magnesium content increased. Magnesium promoted a repolymerization reaction leading to increases of the average molecular weight and solid content of the bio-oil from 950 Da to 1670 Da and 0.37 wt% to 0.73 wa, respectively. Also, the amounts of levoglucosan and other small molecules detected by gas chromatography-mass spectroscopy analysis decreased as large fractions such as oligomers or char fines were formed. Meanwhile, the yield and elemental composition of the bio-oil barely changed. Following the pyrolysis, most of the inorganic metals remained in the bio-char. Furthermore, the various forms of aromatic hydrocarbons obtained from the non-condensed pyrolytic gas fractions were identified and quantified in this study. (C) 2014 Elsevier B.V. All rights reserved.
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