Molecular Catalysis, volume 529, pages 112527
Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane
Publication type: Journal Article
Publication date: 2022-08-01
Catalysis
Physical and Theoretical Chemistry
Process Chemistry and Technology
Abstract
• There are two types of LAS on the Pd/WZ surface with different origin. • H 2 -reduction of Pd/WZ above 300 °C forms of additional LAS, which include W 5+ atoms. • Pd additions into catalysts enhance their acidity by forming new Lewis acid sites. • This type of LAS is responsible for high selectivity of heptane isomerization. The activity of Pd/WO 3 -ZrO 2 catalysts in the reaction of heptane isomerization is determined by a complex of acid sites, primarily by the presence of LAS on the catalysts surface formed by the inclusion of W 5+ atoms in their composition. This type of acid sites ensures high heptane conversion and acceptable selectivity in the formation of heptane isomers. The contribution of these acid sites to the activity of catalysts can be optimized at the stages of high-temperature activation in a hydrogen flow. The optimal temperature conditions for H 2 -activation should be chosen in the average temperature range of 200–300 °С, sufficient to achieve a fraction of W 5+ atoms on the catalyst surface of ca. 35% (at. W 5+ /at. W 6+ ). The second group includes Lewis acid sites, which are formed upon the introduction of palladium into the composition of the tungstated zirconia catalyst. The optimal loading of Pd is ca. 0.1 wt.%; above this amount, the acid sites are covered with dispersed palladium, which leads to a decrease in the total acidity of the catalyst. Stabilization of medium strength acid sites on the catalysts surface after the addition of Pd to the catalyst ensures the heptane isomerization reaction in hydrogen atmosphere at a moderate temperature of 200 °C with a high selectivity of 91.1–91.7%.
Citations by journals
|
1
2
|
|
|
Molecular Catalysis
|
Molecular Catalysis
2 publications, 28.57%
|
|
Kataliz v promyshlennosti
|
Kataliz v promyshlennosti, 1, 14.29%
Kataliz v promyshlennosti
1 publication, 14.29%
|
|
Industrial & Engineering Chemistry Research
|
Industrial & Engineering Chemistry Research
1 publication, 14.29%
|
|
RSC Advances
|
RSC Advances
1 publication, 14.29%
|
|
Applied Catalysis B: Environmental
|
Applied Catalysis B: Environmental
1 publication, 14.29%
|
|
International Journal of Hydrogen Energy
|
International Journal of Hydrogen Energy
1 publication, 14.29%
|
|
1
2
|
Citations by publishers
|
1
2
3
4
|
|
|
Elsevier
|
Elsevier
4 publications, 57.14%
|
|
Kalvis
|
Kalvis, 1, 14.29%
Kalvis
1 publication, 14.29%
|
|
American Chemical Society (ACS)
|
American Chemical Society (ACS)
1 publication, 14.29%
|
|
Royal Society of Chemistry (RSC)
|
Royal Society of Chemistry (RSC)
1 publication, 14.29%
|
|
1
2
3
4
|
- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
{"yearsCitations":{"type":"bar","data":{"show":true,"labels":[2023,2024],"ids":[0,0],"codes":[0,0],"imageUrls":["",""],"datasets":[{"label":"Citations number","data":[5,2],"backgroundColor":["#3B82F6","#3B82F6"],"percentage":["71.43","28.57"],"barThickness":null}]},"options":{"indexAxis":"x","maintainAspectRatio":true,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":1,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Citations per year","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}},"journals":{"type":"bar","data":{"show":true,"labels":["Molecular Catalysis","Kataliz v promyshlennosti","Industrial & Engineering Chemistry Research","RSC Advances","Applied Catalysis B: Environmental","International Journal of Hydrogen Energy"],"ids":[4906,25503,12141,3100,18270,8699],"codes":[0,0,0,0,0,0],"imageUrls":["\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp","","\/storage\/images\/resized\/iLiQsFqFaSEx6chlGQ5fbAwF6VYU3WWa08hkss0g_medium.webp","\/storage\/images\/resized\/leiAYcRDGTSl5B1eCnwpSGqmDEUEfDPPoYisFGhT_medium.webp","\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp","\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp"],"datasets":[{"label":"","data":[2,1,1,1,1,1],"backgroundColor":["#3B82F6","#3B82F6","#3B82F6","#3B82F6","#3B82F6","#3B82F6"],"percentage":[28.57,14.29,14.29,14.29,14.29,14.29],"barThickness":13}]},"options":{"indexAxis":"y","maintainAspectRatio":false,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":null,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Journals","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}},"publishers":{"type":"bar","data":{"show":true,"labels":["Elsevier","Kalvis","American Chemical Society (ACS)","Royal Society of Chemistry (RSC)"],"ids":[17,6927,40,123],"codes":[0,0,0,0],"imageUrls":["\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp","","\/storage\/images\/resized\/iLiQsFqFaSEx6chlGQ5fbAwF6VYU3WWa08hkss0g_medium.webp","\/storage\/images\/resized\/leiAYcRDGTSl5B1eCnwpSGqmDEUEfDPPoYisFGhT_medium.webp"],"datasets":[{"label":"","data":[4,1,1,1],"backgroundColor":["#3B82F6","#3B82F6","#3B82F6","#3B82F6"],"percentage":[57.14,14.29,14.29,14.29],"barThickness":13}]},"options":{"indexAxis":"y","maintainAspectRatio":false,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":null,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Publishers","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}}}
Metrics
Cite this
GOST |
RIS |
BibTex
Cite this
GOST
Copy
Smolikov M. D. et al. Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane // Molecular Catalysis. 2022. Vol. 529. p. 112527.
GOST all authors (up to 50)
Copy
Smolikov M. D., Shkurenok V. A., Bikmetova L. I., Prosvirin I. P., Gulyaeva T. I., Bukhtiyarov A. V., Paukshtis E. A., Bukhtiyarov V. I., Lavrenov A. V. Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane // Molecular Catalysis. 2022. Vol. 529. p. 112527.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1016/j.mcat.2022.112527
UR - https://doi.org/10.1016%2Fj.mcat.2022.112527
TI - Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane
T2 - Molecular Catalysis
AU - Smolikov, Mikhail D
AU - Shkurenok, Violetta A
AU - Bikmetova, Liliya I
AU - Prosvirin, Igor P.
AU - Gulyaeva, T I
AU - Bukhtiyarov, Andrey V
AU - Paukshtis, Evgeny A
AU - Bukhtiyarov, Valery I
AU - Lavrenov, Alexander V
PY - 2022
DA - 2022/08/01 00:00:00
PB - Elsevier
SP - 112527
VL - 529
SN - 2468-8231
ER -
Cite this
BibTex
Copy
@article{2022_Smolikov,
author = {Mikhail D Smolikov and Violetta A Shkurenok and Liliya I Bikmetova and Igor P. Prosvirin and T I Gulyaeva and Andrey V Bukhtiyarov and Evgeny A Paukshtis and Valery I Bukhtiyarov and Alexander V Lavrenov},
title = {Effect of hydrogen reduction and palladium promotion of tungstate-modified zirconia on isomerization of heptane},
journal = {Molecular Catalysis},
year = {2022},
volume = {529},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016%2Fj.mcat.2022.112527},
pages = {112527},
doi = {10.1016/j.mcat.2022.112527}
}
Profiles