• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME Internal Combustion Engine Division technical conference >REACTION OF SULFURIC ACID IN LUBE OIL: IMPLICATIONS FOR LARGE TWO- STROKE DIESEL ENGINES
【24h】

REACTION OF SULFURIC ACID IN LUBE OIL: IMPLICATIONS FOR LARGE TWO- STROKE DIESEL ENGINES

机译：润滑油中的硫酸反应：对大二冲程柴油机的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Slow-steaming operation and an increased pressure in the combustion chamber have contributed to increased sulfuric acid (H_2SO_4) condensation on the cylinder liners in large two-stroke marine diesel engines, thus causing increased corrosion wear. To cope with this, lube oils are formulated with overbased detergent additives present as CaCO_3 reverse micelles to neutralize the condensing H_2SO_4. In this present work, a mixed flow reactor (MFR) setup aims to investigate the neutralization reaction by varying Ca/S molar ratio, stirrer speed, H_2SO_4 inlet concentration, and residence time. Lube oil samples from the outlet of the MFR were analysed by use of Fourier Transform Infrared Spectroscopy (FTIR) and a titration method. The MFR results indicate that the CaCO_3-H_2SO_4 reaction is very fast in a real engine, if the cylinder liner is well-wetted, the oil-film is well-mixed, and contains excess of CaCO_3 compared to the condensed H_2SO_4. The observed corrosion wear in large two-stroke marine diesel engines could consequently be attributed to local molar excess of H_2SO_4 compared to CaCO_3 reverse micelles on the cylinder liners.
机译：缓慢的蒸汽运行和燃烧室内的压力增加，导致大型二冲程船用柴油机的气缸套上的硫酸（H_2SO_4）冷凝增加，从而导致腐蚀磨损增加。为了解决这个问题，润滑油以高碱性清净剂添加剂配制，以CaCO_3反胶束的形式存在，以中和冷凝的H_2SO_4。在本工作中，混合流反应器（MFR）的设置旨在通过改变Ca / S摩尔比，搅拌器速度，H_2SO_4入口浓度和停留时间来研究中和反应。使用傅里叶变换红外光谱（FTIR）和滴定法分析了MFR出口的润滑油样品。 MFR结果表明，在真正的发动机中，CaCO_3-H_2SO_4反应非常快，如果汽缸套润湿良好，则油膜混合均匀，并且与冷凝的H_2SO_4相比，含有过量的CaCO_3。因此，相比于气缸套上的CaCO_3反胶束，在大型二冲程船用柴油机中观察到的腐蚀磨损可能归因于H_2SO_4的局部摩尔过量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号