Journal
ADVANCED MATERIALS
Volume 33, Issue 36, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202100074
Keywords
continuous recovery; environmental remediation; magnetic heating; oil-spill clean-up sponges; viscous crude oil
Categories
Funding
- National Natural Science Foundation of China [51572067, 51972090, 21501039, 21701165, 51732011, 21761132008, 51502281]
- Fundamental Research Funds for the Central Universities [WK2060000033, JZ2021HGPB0059]
- Natural Science Foundation of Anhui Province [2008085J06]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
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By fabricating ferrimagnetic sponges with hydrophobic porous channels, it is possible to remotely heat heavy crude oil, reducing its viscosity and increasing the flow rate into the pores. When equipped with a self-priming pump, continuous recovery of viscous crude oil can be achieved via remote magnetic heating.
The high viscosity and low fluidity of heavy crude oil hinder its sorption by conventional porous sorbents, so the efficient clean-up of such heavy crude oil spills is challenging. Recently, Joule heating has been emerging as a new tool to reduce the viscosity of heavy crude oil dramatically. However, this direct-contact heating approach presents a potential risk due to the high voltage applied. To develop a non-contact recovery of viscous crude oil, here, a new approach for the fabrication of a series of ferrimagnetic sponges (FMSs) with hydrophobic porous channels is reported, whose surface can be remotely heated to 120 degrees C within 10 s under an alternating magnetic field (f = 274 kHz, H = 30 kA m(-1)). Compared with the solar-driven superficial heating, the integral magnetic heating in FMSs can result in a higher internal temperature of the sponges because of the confinement of thermal transport in the porous channels, which contributes to a dramatic decrease in oil viscosity and a significant increase in oil flow into the pores of FMSs. Furthermore, FMSs assembled with a self-priming pump can achieve continuous recovery of viscous crude oil (33.05 g h(-1) cm(-2)) via remotely magnetic heating.
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