期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 7, 期 1, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2019.102905
关键词
Pyrolysis; Neem press seed cake; Response Surface Methodology; Bio-oil; GC-MS
资金
- Indian government department of science and technology under the bioenergy scheme [GAP-0363]
Slow pyrolysis of neem press seed cake (NPSC) was carried out in a fixed bed batch reactor to study the effects of temperature, retention time, and nitrogen (N-2) flow rate on liquid and char yields. Response surface methodology (RSM) based on Box-Behnken design was used to determine the optimum operating conditions to maximize the liquid yield. The highest liquid yield of 52.1 wt% was obtained at 512.5 degrees C, after 60 min using 0.5 L/min N-2 flow rate. Scanning electron microscopy (SEM), elemental analysis, bomb calorimeter, Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction techniques and gas chromatography-mass spectrometry (GCeMS) were used to determine the physicochemical properties of NPSC and char, and chemical properties of liquid. GCeMS analysis showed that the bio-oil was rich in 9-octadecenamide, 2-propenyl decanoate, heptadecanenitrile, and oleanitrile. The higher heating value of the bio-oil and NPSC were 32.8 and 16.05 MJ/kg, respectively at 575 degrees C. The FT-IR results showed a decrease in the number of O-H (hydroxyl), C=H (alkanes), C=O (esters), -C-H (alkanes), and C-O (primary alcohol) groups in NPSC with increasing pyrolysis temperature.
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