TY - JOUR
T1 - Bio-oil and biochar production from halophyte biomass: effects of pre-treatment and temperature onSalicornia bigeloviipyrolysis
AU - Iaccarino, Alessia
AU - Gautam, Ribhu
AU - Sarathy, Mani
N1 - KAUST Repository Item: Exported on 2021-05-06
Acknowledgements: This work was sponsored by King Abdullah University of Science and Technology (KAUST). AI acknowledges support from the KAUST Visiting Student Research Program (VSRP). We thank Mark Tester, Muppala Reddy, Gabriele Fiene, and Octavio Salazar Moya from the KAUST Center for Desert Agriculture for providing the biomass samples.
PY - 2021
Y1 - 2021
N2 - Salicornia bigelovii(SB) is a strategically important plant in many regions owing to its ability to grow in arid climates and saline water. This study evaluates the effects of halophyte biomass pre-treatment on the production of bio-oil and biocharviapyrolysis of SB. The pyrolysis experiments were performed in a quartz tube reactor at 600, 700, and 800 °C to understand the effect of the temperature on the products obtained from untreated SB (USB) and pre-treated SB (PSB). USB and PSB samples were characterized to determine their thermal stability, elemental composition, mineral composition, and functional group identification. Pre-treatment of SB reduced the ash and Na content by 71% and 45%, respectively. Ash removal favored the pyrolysis-assisted extraction of carboxylic acids, and their selectivity in the bio-oil increased from 20.7% (USB) to 33.4% (PSB) at 600 °C. The selectivity to phenolics was observed to be the highest at 800 °C in the bio-oil from USB (10.4%) and PSB (13.4%). PSB pyrolysis increased the specific surface area of biochar by four times, whereas carbon nanostructures were observed in the biochar from USB. The formation pathways of the major compounds from the pyrolysis of various amino acids, cellulose, hemicellulose, fatty acids, and lignin present in SB were elucidated by proposing a plausible reaction scheme.
AB - Salicornia bigelovii(SB) is a strategically important plant in many regions owing to its ability to grow in arid climates and saline water. This study evaluates the effects of halophyte biomass pre-treatment on the production of bio-oil and biocharviapyrolysis of SB. The pyrolysis experiments were performed in a quartz tube reactor at 600, 700, and 800 °C to understand the effect of the temperature on the products obtained from untreated SB (USB) and pre-treated SB (PSB). USB and PSB samples were characterized to determine their thermal stability, elemental composition, mineral composition, and functional group identification. Pre-treatment of SB reduced the ash and Na content by 71% and 45%, respectively. Ash removal favored the pyrolysis-assisted extraction of carboxylic acids, and their selectivity in the bio-oil increased from 20.7% (USB) to 33.4% (PSB) at 600 °C. The selectivity to phenolics was observed to be the highest at 800 °C in the bio-oil from USB (10.4%) and PSB (13.4%). PSB pyrolysis increased the specific surface area of biochar by four times, whereas carbon nanostructures were observed in the biochar from USB. The formation pathways of the major compounds from the pyrolysis of various amino acids, cellulose, hemicellulose, fatty acids, and lignin present in SB were elucidated by proposing a plausible reaction scheme.
UR - http://hdl.handle.net/10754/669097
UR - http://xlink.rsc.org/?DOI=D0SE01664K
UR - http://www.scopus.com/inward/record.url?scp=85104816703&partnerID=8YFLogxK
U2 - 10.1039/d0se01664k
DO - 10.1039/d0se01664k
M3 - Article
SN - 2398-4902
VL - 5
SP - 2234
EP - 2248
JO - Sustainable Energy and Fuels
JF - Sustainable Energy and Fuels
IS - 8
ER -