The acid properties of H-ZSM-5 as studied by NH3-TPD and 27Al ...
2007年9月10日 · The acid properties of H-ZSM-5 zeolites with different SiO 2 /Al 2 O 3 ratios (30, 50, 80, 150, 280 and 1000) were examined by means of the temperature programmed …
Temperature Programmed Desorption (TPD) was first proposed by Amemiya and Cvetanovic in 1963. 1) In TPD, an adsorbent is adsorbed at equilibrium under predetermined conditions, and …
Interpretation of NH3-TPD Profiles from Cu-CHA Using First ...
2018年11月26日 · The present work shows that NH3-TPD from Cu-CHA can be reconciled with copper complexes as NH3 storage sites. Temperature-programmed desorption (TPD) with …
On the interpretation of the NH3-TPD patterns of H-ZSM-5 and ...
2001年10月1日 · The NH 3-TPD measurement shows a better resolution. We assign the LT peak essentially to the desorption of NH 3 molecules hydrogen-bound to NH 4 + cations. It can not …
NH3-TPD methodology for quantifying hydrothermal aging of …
2018年11月23日 · The NH 3-TPD experiment was performed by ramping temperature up from 200 to 550 °C, under a gas mixture of 8% CO 2, 7% H 2 O and balance N 2, at a rate of 10 …
Interpretation of NH3-TPD Profiles from Cu-CHA Using First ...
2019年2月1日 · Temperature-programmed desorption (TPD) with ammonia is widely used for zeolite characterization revealing information on acidity and adsorption sites. The …
Temperature-programmed desorption of ammonia (NH3-TPD ...
On the NH3-TPD curve of γ-alumina, two desorption peaks of ammonia centered at 237 and 335 °C were observed (Figure 3b).