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DOI	10.1016/j.jcou.2019.07.031
	Reduction of Na and K contents in bio-heavy oil using micro-/nano-sized CO2 bubbles
	Kim Y.; Oh J.-I.; Zhang M.; Lee J.; Park Y.-K.; Ho Lee K.; Kwon E.E.
发表日期	2019
ISSN	22129820
起始页码	430
结束页码	436
卷号	34
英文摘要	Co-combustion of bunker-C oil and bio-heavy oil for power generation provides a strategic way for mitigating the environmental burdens (climate change) due to the intrinsic carbon neutrality of bio-heavy oil. Prior to the co-combustion process, the high content of Na and K in heavy oil should be removed for the operational safety. Given that the washing process has been currently practiced for metal removal, it is desirable to develop the chemical-free washing process. Note that H2SO4 was commonly used during the washing process. To this end, this study laid great emphasis on the possible use of CO2 for the washing process. To increase the removal efficiency of Na and K, this study particularly employed micro-/nano-sized CO2 bubbles. To access the in-depth insights, a computational fluid dynamics (CFD) simulation was conducted prior to a lab-scale experimental work. The CFD simulation suggests that CO2 bubbling expedited the mixability during the washing process. Also, the CFD simulation suggested that the CO2 bubbling effects could be enhanced because the high viscosity of bio-heavy oil cancelled out the buoyancy force. A lab-scale experimental work was also in good agreement with the CFD simulation. In the presence of CO2 bubbles, 80% of Na and K was removed when the volumetric ratio of water and bio-heavy oil was 8. Even under the volumetric ratio condition of 0.125, the metal removal efficiency was not substantially reduced. Thus, all experimental findings signify that metal removal by micro-/nano-sized CO2 bubbling should be done by a cascade system. Elsevier Ltd.
英文关键词	Bio-heavy oil; CO2; Metal removal; Micro-/nano-bubbles; Waste-to-energy
scopus关键词	Bubble formation; Carbon dioxide; Climate change; Computational fluid dynamics; Crude oil; Sodium; Washing; Waste incineration; Carbon neutralities; Computational fluid dynamics simulations; Environmental burdens; Metal removal; Micro-/nano-bubbles; Operational safety; Removal efficiencies; Waste to energy; Heavy oil production
来源期刊	Journal of CO2 Utilization
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176151
作者单位	Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea; Advanced Technology Department, Land and Housing Institute, Daejeon, 34047, South Korea; Department of Environmental Engineering, China Jiliang University No, 258, Xueyuan Street, Hangzhou, Zhejiang, 310018, China; Department of Environmental and Safety Engineering, Ajou University, Suwon, 16499, South Korea; School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea; Department of Aerospace Engineering, Sejong University, Seoul, 05006, South Korea
推荐引用方式 GB/T 7714	Kim Y.,Oh J.-I.,Zhang M.,et al. Reduction of Na and K contents in bio-heavy oil using micro-/nano-sized CO2 bubbles[J],2019,34.
APA	Kim Y..,Oh J.-I..,Zhang M..,Lee J..,Park Y.-K..,...&Kwon E.E..(2019).Reduction of Na and K contents in bio-heavy oil using micro-/nano-sized CO2 bubbles.Journal of CO2 Utilization,34.
MLA	Kim Y.,et al."Reduction of Na and K contents in bio-heavy oil using micro-/nano-sized CO2 bubbles".Journal of CO2 Utilization 34(2019).