globalchange  > 气候减缓与适应
DOI: 10.1016/j.jcou.2018.06.003
Scopus记录号: 2-s2.0-85048412386
论文题名:
Contribution of pyrolytic gas medium to the fabrication of co-impregnated biochar
作者: Cho D.-W.; Kim S.; Tsang D.C.W.; Bolan N.S.; Kim T.; Kwon E.E.; Ok Y.S.; Song H.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26
起始页码: 476
结束页码: 486
语种: 英语
英文关键词: Biochar ; Biomass ; Carbon dioxide ; Cobalt ; Nitrophenol reduction
Scopus关键词: Biomass ; Carbon dioxide ; Cobalt ; Degradation ; Fabrication ; Glucose ; Phenols ; Porosity ; Sodium Borohydride ; Bio chars ; Catalytic performance ; Degradation products ; External surfaces ; Nitrophenols ; Physicochemical characteristics ; Porous structures ; Spent coffee grounds ; Pyrolysis
英文摘要: Co-impregnated biochars were fabricated by pyrolysis of spent coffee grounds (SCG) or glucose as carbon (C) sources under N2 and CO2. The formed biochar samples were characterized with FE-SEM, TEM/EDS, XRD, TGA, Raman, XPS, and BET, and further used as catalytic medium for the reduction of p-nitrophenol in the presence of NaBH4. The physicochemical characteristics of biochar significantly changed with the types of C precursor and flow gas stream. The biochar from pyrolysis of SCG under N2 gas stream showed good dispersion of Co nanoparticles (10-20nm) in carbon matrix as compared to that produced under CO2 stream, but BET surface area was very small (4.5 m2 g-1) due to pore blockage by thermal degradation products. SCG-derived biochar formed in the presence of CO2 possessed highly porous structure due to CO2-assisted C volatilization. In contrast, for glucose-derived biochar, significant reduction in porosity of biochar occurred with excess devolatilization of C under CO2 conditions, while the pyrolysis under N2 flow produced porous biochar. These contrasting results demonstrated the significance of structure crystallinity and thermal degradability of C precursors. The catalytic performance of biochar was better correlated with the external surface area rather than microporosity. © 2018 Published by Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111865
Appears in Collections:气候减缓与适应

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作者单位: Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea; Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Global Centre for Environmental Remediation, University of Newcastle, Callaghan, NSW 2308, Australia; Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, NY 11794, United States; O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, South Korea

Recommended Citation:
Cho D.-W.,Kim S.,Tsang D.C.W.,et al. Contribution of pyrolytic gas medium to the fabrication of co-impregnated biochar[J]. Journal of CO2 Utilization,2018-01-01,26
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