Powder and structured Pt/Ce0.75Zr0.25O2-based catalysts: Water gas shift performance and quasi in situ XPS studies

A. M. Gorlova, M. A. Panafidin, V. A. Shilov, V. P. Pakharukova, P. V. Snytnikov, D. I. Potemkin

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

The data on the performance in water gas shift reaction of a powder 5 wt% Pt/Ce0.75Zr0.25O2 and a structured 0.33 wt% Pt/Ce0.75Zr0.25O2/θ-Al2O3/FeCrAl catalysts are reported in this work. For the powder one the lowest outlet CO concentrations were shown to be 0.5, 0.9 and 1.5 vol% corresponding to the initial ones of 5, 10 and 15 vol%, respectively; the temperature required to reach these values did not exceed 310 °C. The quasi in situ XPS data have shown that doping CeO2 with Zr enhances the reducibility of the oxide allowing Ce3+ formation without any treatment. Additionally, it was found that there are 20–30% of nonmetallic Pt atoms on the surface even after a treatment in CO at 300 °C. For the structured catalyst the downward temperature gradient along the monolith was observed with a dispersion of 50–60 °C. The lowest CO concentrations were observed at the temperatures at the catalyst's back point of 280 °C–3.9 and 4.3 vol% CO in the dry gas for 15,700 and 31,400 cm3·gcat−1·h−1, respectively, for 10 vol% CO in the feed gas.

Язык оригиналаанглийский
ЖурналInternational Journal of Hydrogen Energy
Ранняя дата в режиме онлайн30 июн 2022
DOI
СостояниеЭлектронная публикация перед печатью - 30 июн 2022

Предметные области OECD FOS+WOS

  • 2.07 ЭНЕРГЕТИКА И РАЦИОНАЛЬНОЕ ПРИРОДОПОЛЬЗОВАНИЕ
  • 1.07 ПРОЧИЕ ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ
  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ

Fingerprint

Подробные сведения о темах исследования «Powder and structured Pt/Ce0.75Zr0.25O2-based catalysts: Water gas shift performance and quasi in situ XPS studies». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать