期刊
HELIYON
卷 6, 期 5, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2020.e04019
关键词
Chemical engineering; Environmental chemical engineering; Materials characterization; Adsorption; Biochar; Pyrolysis; Palm oil; CO2; RSM
资金
- Walailak University (WU)
- New Strategic Research (P2P) Project (Phase 2), Walailak University, Thailand
The amount of palm oil mill residues increases rapidly and will become a severe problem in the future. One potential technique for alleviating this concerning environmental problem is to convert these residues into biochar by the pyrolysis process. Pyrolysis of three types of palm oil mill residues (namely, palm kernel shells, empty palm fruit bunches, and oil palm fibers) was conducted in a fixed bed reactor at 500 degrees C and 2 L/min of nitrogen flow rate for 60 min. The optimization of biochar production was performed using the Box-Behnken design and analyzed using response surface methodology. The effects of three potential factors, including pyrolysis temperatures, nitrogen flow rates, and biomass particle sizes, were studied. The results showed that the highest biochar yield (44.91 wt%) was obtained from pyrolysis of palm kernel shells at 525 degrees C with a nitrogen flow rate of 2 L/min and a particle size of 750 mu m. Application of biochar produced from palm kernel shells for carbon dioxide capture was tested in a packed bed adsorber of 3.0 g of biochar sample by flowing 1,400 ppm of carbon dioxide in the gas feed mixture at 2.5 L/min. The capacity of the biochar sample for CO2 adsorption was 0.46 mmol/g.
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