Effect of dealumination on the catalytic performance of Cr-containing Beta zeolite in carbon dioxide assisted propane dehydrogenation
Authors:
- Piotr Michorczyk,
- Kamila Zeńczak-Tomera,
- Barbara Michorczyk,
- Adam Węgrzyniak,
- Marcelina Basta,
- Yannick Millot,
- Laetitia Valentin,
- Stanislaw Dzwigaj
Abstract
New active and selective catalysts for propane to propene dehydrogenation in assistance of CO2 (CO2-PDH) were prepared by chromium incorporation in siliceous SiBeta. The Cr-containing SiBeta zeolite catalysts were obtained by two-step postsynthesis preparation procedure which consist, in the first step, removal of aluminum from TEABeta zeolite with Si/Al of 17 by treatment with nitric acid solution to obtain an aluminium-free SiBeta support with Si/Al ratio of 1000 and, in the second step, various amounts of Cr were introduced into the siliceous SiBeta zeolite structure by wet impregnation. The well correlation between the number of redox Cr sites and propene yield up to 2 wt % of Cr has been determined. Comparing of catalytic activity of Cr-containing Beta zeolite catalysts with the identical Cr content (2 wt % of Cr) supported on SiBeta and AlBeta revealed that the dealumination has great impact on catalytic properties. Low acidity of SiBeta is suitable for achieving high selectivity to propene (above 80 %) while high acidity of starting AlBeta promotes propane cracking to lighter hydrocarbons. Moreover, in switch operation mode between propane dehydrogenation in presence and absence of CO2 the formation rate of propene raises in mode with CO2 only over Cr-containing SiBeta zeolite catalyst, while over Cr-containing AlBeta zeolite catalyst a negative effect on the rate of propene formation was observed.
- Record ID
- CUTc4fa063d803a4351ae9d376f666fdb9a
- Publication categories
- ;
- Author
- Journal series
- Journal of CO2 Utilization, ISSN 2212-9820, e-ISSN 2212-9839
- Issue year
- 2020
- Vol
- 36
- Pages
- 54-63
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 63; Bibliografia (liczba pozycji) - 66; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2019-11-09; Numeracja w czasopiśmie - Vol. 36
- Keywords in English
- propene, dehydrogenation, utilization of CO2, beta zeolite, chromium oxide-based catalyst
- DOI
- DOI:10.1016/j.jcou.2019.09.018 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S2212982019307012?via%3Dihub Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTc4fa063d803a4351ae9d376f666fdb9a/
- URN
urn:pkr-prod:CUTc4fa063d803a4351ae9d376f666fdb9a
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.