Oil recovery and heat transfer performance of polyurethane sponges coated with 3D carbon nano networks

Zheng Li; Lixin Xue; Guojun Jiang; Congjie Gao

doi:10.1016/j.jhazmat.2024.137045

Oil recovery and heat transfer performance of polyurethane sponges coated with 3D carbon nano networks

J Hazard Mater. 2024 Dec 31:486:137045. doi: 10.1016/j.jhazmat.2024.137045. Online ahead of print.

Authors

Zheng Li¹, Lixin Xue², Guojun Jiang³, Congjie Gao⁴

Affiliations

¹ Center for Membrane Separation and Water Science & Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
² College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China; Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, 325024, China; International Innovation Center for New Materials, Cangnan, Wenzhou, 325900, China. Electronic address: [email protected].
³ Zhijiang College, Zhejiang University of Technology, Shaoxing 312000, China. Electronic address: [email protected].
⁴ Center for Membrane Separation and Water Science & Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.

PMID: 39778482
DOI: 10.1016/j.jhazmat.2024.137045

Abstract

Heatable super hydrophobic polyurethane (PU) sponges (S-GNS/CNT/PVA@PU) containing three-dimensional (3D) carbon nano-networks (CNNs) coatings made from two-dimensional (2D) expanded graphite nano-sheets (GNS) bridged by one-dimensional (1D) carbon nano-tubes (CNT) were constructed using polyvinyl alcohol (PVA) as binder, in which light and/or electric energy could be rapidly converted into heat to reduce the viscosity of spilled heavy oils, resulting in greatly increased oil. Their heavy oil recovery rate could reach 792 kg/(m²·h) under combined light and Joule heating of 1 sun and 5 V. Surface heat dissipating coefficient Ks, heat dissipating index n, and surface heat absorption capacity Cs were studied relating to sizes and shapes of surface heating fields under varied heating modes. Deviations from Newton's law of cooling were observed, with n values varying from 1.070 to 1.690.

Keywords: Absorbent; Carbon nano network; Heat dissipation; Heavy oil recovery; Surface heating field.

Publication types

Letter