Modified temperature programmed desorption evaluation of hydrocarbon trapping by CsMOR zeolite under cold start conditions

作者：Wesson Paul J; Snurr Randall Q^*

来源：Microporous and Mesoporous Materials, 2009, 125(1-2): 35-38.

DOI：10.1016/j.micromeso.2009.03.026

• Temperature programmed desorption
• Cold start
• Single-file diffusion
• Mordenite
• Hydrocarbon trap

A cesium-exchanged mordenite zeolite was tested as a hydrocarbon trap for cold-start automotive applications using a modified temperature programmed desorption (TPD) procedure. In the modified TPD procedure, a step increase in feed concentration was performed simultaneously with the start of the temperature ramp to more closely mimic cold start conditions. The feed stream contained mixtures of toluene, propane, and water. The cesium-exchanged mordenite trapped propane under these dynamic conditions, demonstrated improved propane trapping when toluene was coadsorbed, and retained its trapping capacity after nearly 40 h of hydrothermal treatment.

• 出版日期2009-10-1
• 单位西北大学