Web1 jun. 2024 · Effect of hydrothermal aging temperature on a Cu-SSZ-13/H-SAPO-34 composite for the selective catalytic reduction of NOx by NH3. ... RSC advances. 2024; Cu-SSZ-13 suffers activity loss after hydrothermal treatment at high temperatures, particularly above 850 °C. The stability of Cu-SSZ-13 can be enhanced by compositing with H-SAPO ... Web22 feb. 2024 · However, such activity loss was alleviated by further hydrothermal aging treatment. To reveal the reason for this interesting result, a variety of characterization techniques including NMR, H 2 -TPR, X-ray photoelectron spectroscopy, NH 3 -TPD, and in situ DRIFTS measurements were employed.
Impact of Non-Accelerated Aging on the Properties of Parylene C
Web25 jul. 2024 · However, fewer efforts have been made to study its damping properties after hydrothermal aging. In this paper, the effect of surface treatment (including … Web11 apr. 2024 · The addition of Pd to Pt-based diesel oxidation catalysts is known to enhance performance and restrict the anomalous growth of Pt nanoparticles when subjected to aging at high temperatures in oxidative environments. To gain a mechanistic understanding, we studied the transport of the mobile Pt and Pd species to the vapor phase, since vapor … hel neuvola
Catalysts Free Full-Text Effects of Hydrothermal Aging on CO …
Web13 mrt. 2013 · The influence of hydrothermal aging between 500 and 900 °C for 3 h, on the structure of a Cu-Beta catalyst was studied in this work. The XRD measurements indicated a structural breakdown of the zeolite upon 900 °C hydrothermal aging. This was confirmed from the loss of surface area as measured by BET method. The temperature for the … WebCu-exchanged SSZ-16 zeolite catalysts exhibit outstanding NH3-SCR activity, but their catalytic performance after hydrothermal treatments is not ideal. In order to improve the hydrothermal stability of Cu-SSZ-16, CuCex-SSZ-16 series catalysts were prepared via an ion exchange process, and the effect of Ce modification on the hydrothermal stability … Web25 feb. 2024 · With an aging-induced shift of T 50 by 27 °C towards higher temperatures, monometallic Pd/Al 2 O 3 exhibits the least pronounced deactivation after 16 h of hydrothermal treatment, which underscores the high thermal stability of Pd-based catalysts that was reported in the past [ 32, 33 ]. hel palvelu oy