Thermochemical conversion of cobalt-loaded spent coffee grounds for production of energy resource and environmental catalyst
- Authors
- Cho, Dong-Wan; Tsang, Daniel C. W.; Kim, Sohyun; Kwon, Eilhann E.; Kwon, Gihoon; Song, Hocheol
- Issue Date
- Dec-2018
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Engineered biochar; Carbon-based catalyst; CO2 utilization; Lignin valorization; Waste biomass recycling; Catalytic reduction
- Citation
- BIORESOURCE TECHNOLOGY, v.270, pp.346 - 351
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 270
- Start Page
- 346
- End Page
- 351
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190835
- DOI
- 10.1016/j.biortech.2018.09.046
- ISSN
- 0960-8524
- Abstract
- Thermochemical conversion of cobalt (Co)-loaded lignin-rich spent coffee grounds (COSCG) was carried out to find the appropriate pyrolytic conditions (atmospheric gas and pyrolytic time) for syngas production (H-2 and CO) and fabricate Co-biochar catalyst (CBC) in one step. The use of CO2 as atmospheric gas and 110-min pyrolytic time was optimal for generation of H2 (similar to 1.6 mol% in non-isothermal pyrolysis for 50 min) and CO (similar to 4.7 mol% in isothermal pyrolysis for 60 min) during thermochemical process of COSCG. The physicochemical properties of CBC fabricated using optimized pyrolytic conditions for syngas production were scrutinized using various analytical instruments (FE-SEM, TEM, XRD, and XPS). The characterizations exhibited that the catalyst consisted of metallic Co and surface wrinkled carbon layers. As a case study, the catalytic capability of CBC was tested by reducing p-nitrophenol (PNP), and the reaction kinetics of PNP in the presence of CBC was measured from 0.04 to 0.12 s(-1).
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