CO2-cofeeding catalytic pyrolysis of macadamia nutshell
- Authors
- Jung, Sungyup; Kwon, Dohee; Tsang, Yiu Fai; Park, Young-Kwon; Kwon, Eilhann E.
- Issue Date
- Apr-2020
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Waste-to-energy; Catalytic pyrolysis; Macadamia nutshell; Syngas; Carbon dioxide
- Citation
- Journal of CO2 Utilization, v.37, pp.97 - 105
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of CO2 Utilization
- Volume
- 37
- Start Page
- 97
- End Page
- 105
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190747
- DOI
- 10.1016/j.jcou.2019.12.001
- ISSN
- 2212-9820
- Abstract
- Here in this study, we laid great stress on a development of sustainable waste-to-energy (WtE) platform via CO2-cofeeding catalytic pyrolysis of macadamia nutshell (MNS) at mild temperature region. To this end, one-stage and two-stage (non-catalytic/catalytic) pyrolysis of MNS was performed to establish the fundamental relationship of temperature effect on syngas formation. The formation of gaseous pyrolysates was substantially enhanced when two-stage pyrolysis of MNS was applied, and second heating zone isothermally ran at 700 degrees C. Such the enhanced generation of gaseous pyrolysates from two-stage MNS pyrolysis of MNS was likely due to temperature-driven cracking of volatile organic compounds (VOCs). Also, catalytic two-stage pyrolysis of MNS was performed at lower isothermal running temperature (500 degrees C) over Ni/SiO2 and Co/SiO2. The enhanced formation of syngas (H-2 and CO) was observed from catalytic pyrolysis of MNS. Therefore, pyrolysis of MNS over Ni/SiO2 or Co/SiO2 could be a reliable platform for enhancing syngas formation at mild temperature (<= 500 degrees C) under CO2 environment. In addition, all experimental findings suggested that the use of CO2 is beneficial in the WtE platform, and the use of CO2 could be a practical climate change mitigation measure.
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