Synthesis and tribological studies of nanoparticle additives for pyrolysis bio-oil formulated as a diesel fuel

Research output: Contribution to journalArticle


  • Yufu Xu
  • Yubin Peng
  • Xiaojing Zheng
  • Xianguo Hu

Colleges, School and Institutes

External organisations

  • Institute of Tribology, Hefei University of Technology, Hefei 230009, PR China
  • School of Arts and Media, Hefei Normal University, Hefei 230601, China
  • Institute of Tribology, School of Mechanical and Automotive Engineering, Hefei University of Technology


The tribological behaviour of pyrolysis bio-oil with a synthesized nano-Lanthanum oxide (La<inf>2</inf>O<inf>3</inf>) additive was evaluated using a point contact four ball tribometer under different frictional conditions. Results were compared against a micro (μ)-La<inf>2</inf>O<inf>3</inf> additive and an un-additised bio-oil as a control. The results show that nano-La<inf>2</inf>O<inf>3</inf> impregnated bio-oil had better tribological properties than the control groups. Under the operating loads, the optimum nanoparticle concentration within the bio-oil was investigated. At these levels, the combined action of adsorbed bio-oil films on the worn surfaces and the bearing effects of the nano-La<inf>2</inf>O<inf>3</inf> minimized friction and wear. The tribo-mechanisms were ascribed to adhesive wear as a result of lubrication starvation under high loads, and abrasive wear at high rotational speeds as a result of combined deformation and aggregation of the nano-La<inf>2</inf>O<inf>3</inf> particles.


Original languageEnglish
Pages (from-to)80-88
Number of pages9
Early online date20 Mar 2015
Publication statusPublished - 1 Apr 2015


  • Alternative fuel, Lubricity, Nano-La2O3, Nanoparticle, Pyrolysis bio-oil

ASJC Scopus subject areas