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论文类型：会议论文

发表时间：2015-04-07

收录刊物：EI、CPCI-S、SCIE、Scopus

卷号：29

页面范围：828-832

关键字：carbonaceous deposits; remanufacturing; supercritical CO2; FE-SEM; FT-IR

摘要：Carbonaceous deposits can reduce the durability and performance of diesel engines. Chemical cleaning methods are widely used to remove the deposits in remanufacturing industry but the wasted liquid is harmful to the environment. In this paper the supercritical CO2 cleaning technology, an environmentally friendly approach, has been used to remove these contaminants. The surfaces of diesel engine valve before and after cleaned were examined by field emission scanning electron microscope (FE-SEM) and Fourier transform infrared spectroscope (FT-IR). The testing results showed that most organic compounds were dissolved and the stubborn contaminants were changed to be removed easily after cleaning by supercritical CO2 fluid. The new cleaning method can reduce carbonaceous deposits significantly without changing the surface properties of the diesel engine valve. (C) 2015 The Authors. Published by Elsevier B.V.