The effect of lanthanum in Cu/La(-Zr)-Si oxide catalysts for aqueous ethanol conversion into 1,3-butadiene

The work deals with the reaction of ethanol conversion over chromium copper binary oxide catalysts. It showed that acetaldehyde is the main product of the ethanol conversion reaction. As the temperature rises, the direction of the ethanol conversion reaction shifts toward dehydration of ethanol into ethylene. Studies revealed that the atomic ratio of chromium to copper in the composition of the catalyst also has a strong effect on the activity of chromium-copper oxide catalysts. It established that samples with high chromium content in the composition of the catalyst display the greatest activity in the reaction of acetic aldehyde formation. So, on the sample Cr-Cu = 6-4, the yield of acetaldehyde reaches 82.5% with a selectivity of 97.6%. X-ray studies found that Cr-Cu-O catalysts consist mainly of initial oxides and in some samples indicate the chemical compound. X-ray studies showed that as the copper content decreases, the degree of crystallinity increases in the studied catalytic system. Comparison of the activity of Cr-Cu-O catalysts with their crystallinity degree revealed that the rise in crystallinity degree of chromium-copper oxide catalysts leads to the increase of acetic aldehyde yield and its selectivity in the ethanol conversion reaction.

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Production ofC3+Olefins and Propylene from Ethanol by Zr-Modified H-ZSM-5 Zeolite Catalysts

Advances in Materials Science and Engineering ◽

10.1155/2012/293485 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 13

Author(s):

Megumu Inaba ◽

Kazuhisa Murata ◽

Isao Takahara ◽

Ken-ichiro Inoue

Keyword(s):

Carbon Deposition ◽

Aqueous Ethanol ◽

Zeolite Catalysts ◽

Ethanol Conversion ◽

Initial Yield ◽

Zeolite Support ◽

Propylene Yield ◽

Zr Modification ◽

Catalytic Deactivation

Ethanol conversion to C3+olefins, especially propylene, using Zr-modified H-ZSM-5 catalysts was investigated. Zr-modification to H-ZSM-5 zeolite could improve the initial yield of C3+olefins and propylene and could reduce the initial yield of ethylene. In general, catalysts exhibiting the higher initial yield of propylene showed the steeper decrease in propylene yield as the reaction proceeded. However, Zr-modification to H-ZSM-5 could depress the decrease in propylene yield for aqueous ethanol. As cause of catalytic deactivation, carbon deposition on catalyst and framework collapse of zeolite support can be considered. The addition of water to Zr-modified H-ZSM-5 catalyst could depress carbon deposition in some degree, and, as a result, the decrease in propylene yield could be depressed.

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Ethanol conversion into 1,3-butadiene over Zn Zr mixed oxide catalysts supported on ordered mesoporous materials

Fuel Processing Technology ◽

10.1016/j.fuproc.2019.106317 ◽

2020 ◽

Vol 200 ◽

pp. 106317 ◽

Cited By ~ 3

Author(s):

Chang-Il Ahn ◽

Chansoo Kim ◽

Jong Wook Bae ◽

Jonghyun Jeon ◽

Hyun Seung Jung ◽

...

Keyword(s):

Mesoporous Materials ◽

Mixed Oxide ◽

Oxide Catalysts ◽

Ethanol Conversion ◽

Ordered Mesoporous Materials ◽

Mixed Oxide Catalysts ◽

Ordered Mesoporous

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Carbon-Supported Mg–Al Oxide Hybrid Catalysts for Aqueous Ethanol Conversion into 1-Butanol in a Flow Reactor

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.1c02153 ◽

2021 ◽

Author(s):

Olga V. Larina ◽

Pavlo I. Kyriienko ◽

Nataliya D. Shcherban ◽

Pavlo S. Yaremov ◽

Dmytro Yu. Balakin ◽

...

Keyword(s):

Aqueous Ethanol ◽

Flow Reactor ◽

Ethanol Conversion ◽

Hybrid Catalysts ◽

Al Oxide

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Recent advancement in the electrocatalytic synthesis of ammonia

Nanoscale ◽

10.1039/d0nr01359e ◽

2020 ◽

Vol 12 (15) ◽

pp. 8065-8094 ◽

Cited By ~ 6

Author(s):

Xudong Wen ◽

Jingqi Guan

Keyword(s):

Metal Oxide ◽

Oxide Catalysts ◽

Single Atom ◽

Metal Oxide Catalysts ◽

Metal Free ◽

Recent Advancement ◽

Nanocomposite Catalysts

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.

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