期刊
CHEMICAL ENGINEERING JOURNAL
卷 448, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137502
关键词
Pyrolysis; Catalyst; Biofuel; Biochar; Bentonite; Arsenic adsorption
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF 2019R1A4A1027795]
- Basic Research Project of the Korea Institute of Geoscience and Mineral Resources [22-3412]
- National Research Council of Science & Technology (NST), Republic of Korea [22-3412] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, Fe-impregnated bentonite was used as a catalyst in the pyrolysis of grass cut to improve the production of syngas, the quality of bio-oil, and the sorptive property of biochar. The addition of Fe-impregnated bentonite significantly increased the production of H2 and CO, resulting in more homogeneous chemical species and higher sorption capacity in the produced bio-oil and biochar, respectively.
Fe-impregnated bentonite was employed in CO2-assisted pyrolysis of grass cut as a catalyst to improve syngas production, bio-oil quality, and biochar sorptive property. The gas analysis revealed that H-2 and CO production was enhanced by 332 and 7,110%, respectively, by applying Fe-impregnated bentonite in pyrolysis of grass cut while untreated bentonite had a limited influence on syngas production. Bio-oil produced from Fe-impregnated bentonite and grass cut (Fe-BG) had more homogenized chemical species in bio-oil as compared to that produced from pyrolysis of grass cut, and contained methyl 1,1-methyl-dodecanoate ((C14H2O2)-O-8), one of the major components in biodiesel. The produced biochar had high surface area (69.2 m2 g-1) and possessed Fe0 and graphitic carbon structure, which was deemed to arise from reduction of Fe-oxides by syngas. Biochar also showed high As (V) adsorption capacity. The overall results of this work demonstrated the beneficial utility of Fe-impregnated bentonite in pyrolysis of biomass to improve syngas production as well as the quality of pyrogenic products.
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