Control of hydrocarbon cold-start emissions: A search for potential adsorbents
| Autor: | Mladen Eić, Serge Kaliaguine, M.H. Zahedi-Niaki, A. Iliyas |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Ethylene Thermal desorption spectroscopy Diffusion General Chemistry Condensed Matter Physics Molecular sieve Toluene chemistry.chemical_compound Adsorption Hydrocarbon chemistry Chemical engineering Mechanics of Materials Desorption Organic chemistry General Materials Science |
| Zdroj: | Microporous and Mesoporous Materials. 102:171-177 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2006.12.038 |
| Popis: | A principle of single-file diffusion has been successfully employed to control automotive hydrocarbon (HC) emissions particularly during the cold-start period. Temperature programmed desorption technique of toluene and ethylene, as probe sorbates, was employed to screen a series of as synthesized one-dimensional molecular sieves as potential HC traps. Ethylene was found to be trapped to varying degrees by the larger toluene molecules within the 1-D pores of the synthesized samples. In particular, ZSM-12 and SAPO-5 showed superior trapping performance for both sorbates. ZSM-12 was selected as a better candidate because of its higher temperature of desorption maximum for ethylene (150 °C), which is comparable to the light-off temperature of automotive catalytic converter. It was also found that this adsorbent was stable up to the desired temperature of operation i.e., 800 °C, however with some reduction in ethylene trapping capacity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect