Catalysis Today, volume 397-399, pages 511-525
The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion
Domoroshchina E.
1
,
Kuzmicheva Galina
1
,
Zhukova Anna I
2
,
Pirutko Larisa
3
,
Khramov Evgeniy
4
,
Dorokhov Andrey
1
,
3
4
Publication type: Journal Article
Publication date: 2022-08-01
General Chemistry
Catalysis
Abstract
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 (C 3 H 6 , PP ) and ethylene (C 2 H 4 , ETH ) and liquid ethanol conversion ( EC ; temperature range 150–360 °C) with the formation of diethyl ether ((C 2 H 5 ) 2 O, DEE ) and ETH . In the PC reaction the maximum selectivity (S ETH = 75%) and conversion (α P = 65%) were obtained on HZSM-5(40) (650 °С). With an increase in the NA content in NA/HZSM-5 S ETH value increases up to 85%. In the EC reaction S DEE/ETH ~98–99% was reached on HZSM-5(25) (200 °C) and HZSM-5(40) (300 °C); the α E 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 (α E to ETH ~98% at 280 °C) with S DEE/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. • Catalysts HZSM-5/nanosized anatase (NA) were obtained in situ by two methods. • Relationship between catalysts characteristics and catalytic activity was established. • NA/HZSM-5 (sol-gel method) show higher catalytic activity in propane conversion. • NA/HZSM-5 (hydrothermal method) show higher catalytic activity in ethanol conversion.
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- We do not take into account publications that without a DOI.
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Domoroshchina E. et al. The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion // Catalysis Today. 2022. Vol. 397-399. pp. 511-525.
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Domoroshchina E., Kravchenko G. V., Kuzmicheva G., Markova E., Zhukova A. I., Pirutko L., Khramov E., Dorokhov A., Koroleva A. V. The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion // Catalysis Today. 2022. Vol. 397-399. pp. 511-525.
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TY - JOUR
DO - 10.1016/j.cattod.2021.06.021
UR - https://doi.org/10.1016%2Fj.cattod.2021.06.021
TI - The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion
T2 - Catalysis Today
AU - Domoroshchina, E.
AU - Kravchenko, Galina V
AU - Kuzmicheva, Galina
AU - Markova, Ekaterina
AU - Zhukova, Anna I
AU - Pirutko, Larisa
AU - Khramov, Evgeniy
AU - Dorokhov, Andrey
AU - Koroleva, A. V.
PY - 2022
DA - 2022/08/01 00:00:00
PB - Elsevier
SP - 511-525
VL - 397-399
SN - 0920-5861
ER -
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@article{2022_Domoroshchina,
author = {E. Domoroshchina and Galina V Kravchenko and Galina Kuzmicheva and Ekaterina Markova and Anna I Zhukova and Larisa Pirutko and Evgeniy Khramov and Andrey Dorokhov and A. V. Koroleva},
title = {The role of the compositions of HZSM-5 zeolites modified with nanosized anatase in propane and ethanol conversion},
journal = {Catalysis Today},
year = {2022},
volume = {397-399},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016%2Fj.cattod.2021.06.021},
pages = {511--525},
doi = {10.1016/j.cattod.2021.06.021}
}