...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Selective Catalytic Reduction Operation with Heavy Fuel Oil: NO_x, NH_3, and Particle Emissions
【24h】

Selective Catalytic Reduction Operation with Heavy Fuel Oil: NO_x, NH_3, and Particle Emissions

机译：重油的选择性催化还原操作：NO_x，NH_3和颗粒物排放

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To meet stringent NO_x emission limits, selective catalytic reduction (SCR) is increasingly utilized in ships, likely also in combination with low-priced higher sulfur level fuels. In this study, the performance of SCR was studied by utilizing NO_x, NH_3, and particle measurements. Urea decomposition was studied with ammonia and isocyanic acid measurements and was found to be more effective with heavy fuel oil (HFO) than with light fuel oil. This is suggested to be explained by the metals found in HFO contributing to metal oxide particles catalyzing the hydrolysis reaction prior to SCR. At the exhaust temperature of 340 ℃ NO_x, reduction was 85-90%, while at lower temperatures the efficiency decreased. By increasing the catalyst loading, the low temperature behavior of the SCR was enhanced. The drawback of this, however, was the tendency of particle emissions (sulfate) to increase at higher temperatures with higher loaded catalysts. The particle size distribution results showed high amounts of nanoparticles (in 25-30 nm size), the formation of which SCR either increased or decreased. The findings of this work provide a better understanding of the usage of SCR in combination with a higher sulfur level fuel and also of ship particle emissions, which are a growing concern.
机译：为了满足严格的NO_x排放限值，船舶中越来越多地使用选择性催化还原（SCR），也可能与低价高硫水平的燃料结合使用。在这项研究中，通过利用NO_x，NH_3和颗粒测量研究了SCR的性能。通过氨气和异氰酸的测量研究了尿素分解，发现重油（HFO）比轻油更有效。建议用HFO中发现的金属解释，这有助于在SCR之前催化催化氧化反应的金属氧化物颗粒。在排气温度为340℃NO_x时，还原度为85-90％，而在较低温度下，效率下降。通过增加催化剂负载量，SCR的低温性能得到增强。但是，这样做的缺点是，在较高的催化剂负载下，较高的温度下颗粒排放物（硫酸盐）趋于增加。粒度分布结果显示大量纳米颗粒（尺寸为25-30 nm），SCR的形成或多或少。这项工作的发现使人们对SCR与更高硫含量的燃料结合使用以及船舶颗粒物排放的使用有了更好的了解，这是一个日益受到关注的问题。

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