The Role of the Compositions of HZSM-5 Zeolites Modified with Nanosized Anatase in Propane and Ethanol Conversion | Sciact - CRIS-system of Boreskov Institute of Catalysis

The Role of the Compositions of HZSM-5 Zeolites Modified with Nanosized Anatase in Propane and Ethanol Conversion Full article

Journal

Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308

Output data

Year: 2022, Volume: 397-399, Pages: 511-525 Pages count : 15 DOI: 10.1016/j.cattod.2021.06.021

Tags

Composition; Ethanol conversion; HZSM-5 zeolites; Nanocomposites; Nanoscale anatase; Propane conversion

Authors

Domoroshchina Elena ¹ , Kravchenko Galina ¹ , Kuz'micheva Galina ¹ , Markova Ekaterina ² , Zhukova Anna ² , Pirutko Larisa ³ , Khramov Evgeniy ⁴ , Dorokhov Andrey ¹ , Koroleva Alexandra ⁵

Affiliations

1	MIREA - Russian Technological University (RTU MIREA), 78 Vernadsky Avenue, Moscow 119454 Russia
2	Peoples Friendship University of Russia (RUDN University), 6, Miklukho-Maklaya str., Moscow 117198, Russia
3	Boreskov Institute of Catalysis, Siberian Branch, 5, Lavrentiev Ave., Novosibirsk 630090, Russia
4	National Research Center “Kurchatov Institute”, 1, Akademika Kurchatova pl., Moscow 123182, Russia
5	Saint Petersburg State University, 13B Universitetskaya Emb., St Petersburg 199034, Russia

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

0706-2020-0026

For the first time catalytic systems based on HZSM-5 zeolites (Si/Al=12, 25, 40) with nanosized anatase (NA) were obtained in situ by a modified hydrothermal method and a sol-gel method. Initial HZSM-5 and NA/HZSM-5 were characterized (XRPD, XAS, FT-IR, DSC, BET, XPS, SEM, TPD) and analyzed in the reactions of propane (liquefied petroleum gas) conversion (РС; temperature range 200–870 °С) with the formation of the main products propylene (C3H6, PP) and ethylene (C2H4, ETH) and liquid ethanol conversion (EC; temperature range 150–360 °C) with the formation of diethyl ether ((C2H5)2O, DEE) and ETH. In the PC reaction the maximum selectivity (SETH = 75%) and conversion (αP = 65%) were obtained on HZSM-5(40) (650 °С). With an increase in the NA content in NA/HZSM-5 SETH value increases up to 85%. In the EC reaction SDEE/ETH~98–99% was reached on HZSM-5(25) (200 °C) and HZSM-5(40) (300 °C); the αE to ETH is comparable (94%) for all HZSM-5 (300 °C). Modification of HZSM-5 with NA leads to a shift in the EC reaction temperature to lower temperature region (αE to ETH ~98% at 280 °C) with SDEE/ETH~94–100% for NA/HZSM-5(25) and NA/HZSM-5(12) obtained by a modified hydrothermal method. It was established the relationship between HZSM-5 and NA/HZSM-5 catalytic activity and their characteristics: Si/Al, NA content and Ti coordination number (NA/HZSM-5), the content of “zeolite water” with OH groups, specific surface area, meso- and micropores volume and spherical particles size (HZSM-5), surface energy of adsorption centers (HZSM-5 and NA/HZSM-5), and hence the content of acid sites, the strength of which is also determined by the temperature of the catalytic reaction. The reaction mechanisms have been presented. The obtained NA/HZSM-5 catalysts have a higher or comparable catalytic activity to commercial ones, but low cost, ease of preparation, and versatility. © 2021 Elsevier B.V.

Domoroshchina E. , Kravchenko G. , Kuz'micheva G. , Markova E. , Zhukova A. , Pirutko L. , Khramov E. , Dorokhov A. , Koroleva A.
The Role of the Compositions of HZSM-5 Zeolites Modified with Nanosized Anatase in Propane and Ethanol Conversion
Catalysis Today. 2022. V.397-399. P.511-525. DOI: 10.1016/j.cattod.2021.06.021 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Apr 1, 2021
Accepted:	Jun 25, 2021
Published online:	Jun 27, 2021
Published print:	Aug 22, 2022

Web of science:	WOS:000810423200003
Scopus:	2-s2.0-85109089406
Elibrary:	46868653
Chemical Abstracts:	2021:1594899
Chemical Abstracts (print):	179:24922
OpenAlex:	W3176920590

DB	Citing
Scopus	7
Elibrary	8
Web of science	10
OpenAlex	10