| 摘要 |
<p>PURPOSE:To remove gaseous poison from exhaust gas in order to maintain the activity of a serving catalyst over a long period of time, by passing the exhaust gas through an integrally formed porous material coated with activated alumina, prior to the catalytic treatment. CONSTITUTION:The pretreating material is prepared by coating the foamed ceramics of about 87% porosity with activated alumina; this pretreating material is placed in front of the catalyst layer. A sample gas, containing about 500ppm butylene added with gaseous dimethylsilicone (concentration about 25mg/Nm<3>) as the poison, is passed through this catalyst with the wind velocity 0.9Nm/s; therefrom, the conversion efficiency of butylene is 45.0% after 140min.</p> |
