Lubrication Properties of Bio-Oil and Its Emulsions with Diesel Oil

Energies

Qiang Lu¹  Zhi-Bo Zhang²  Hang-Tao Liao²  Xiao-Chu Yang² 

[1] National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;

关键词: bio-oil;    lubrication property;    emulsion;    four-ball tester;    SEM;    XPS;   

DOI  :  10.3390/en5030741

来源: mdpi

【 摘 要 】

Bio-oil from fast pyrolysis of biomass is a low-grade liquid fuel, which can be upgraded through the emulsification with diesel oil. In this study, we prepared two rice husk bio-oil samples with different solid char contents and three bio-oil/diesel-oil emulsion samples with the bio-oil content of 10 wt%, 30 wt% and 50 wt%, respectively. The lubrication properties of these oil samples were evaluated by a four-ball tester. The morphologies of the worn ball surface were observed by scanning electron microscope (SEM). The chemical states of the elements on the worn surface and non-worn surface were analyzed by X-ray photoelectron spectroscope (XPS). The results showed that the bio-oil possessed better extreme-pressure, anti-wear and friction-reducing properties than the commercial diesel oil (number zero). The solid char particles in the bio-oil could improve its lubrication performance. Moreover, the lubrication ability of the emulsions would be enhanced with the increasing of the bio-oil content in the emulsions.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.