Study of Cu modified Zr and Al mixed oxides in ethanol conversion: The structure-catalytic activity relationship

Zhukova, Anna I.; Chuklina, Sofia G.; Maslenkova, S. A.

doi:10.1016/j.cattod.2021.02.015

Cited by 11 publications

(14 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The activity of several acid catalysts for ethanol conversion was described in our previous studies [28–30] . The present study focuses on the surface properties of (Zr+Ce)O 2 ‐Al 2 O 3 catalysts with different mol.…”

Section: Introductionmentioning

confidence: 96%

“…The activity of several acid catalysts for ethanol conversion was described in our previous studies. [28][29][30] The present study focuses on the surface properties of (Zr + Ce)O 2 -Al 2 O 3 catalysts with different mol. ratios (5,10,20,50, and 75 % alumina), and their influence on the selectivity for diethyl ether (DEE), ethylene (E), or acetaldehyde (AcH) production in ethanol test reaction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Selectivity of Ethanol Conversion on Al/Zr/Ce Mixed Oxides: Dehydration and Dehydrogenation Pathways Based on Surface Acidity Properties

et al. 2022

View full text Add to dashboard Cite

Zirconia-alumina mixed oxides (Zr + Ce)O 2 À Al 2 O 3 with various mol. ratios (5, 10, 20, 50, and 75 % alumina) were prepared using the sol-gel method. The catalysts were characterised via XRD, SEM, DTA/TG, BET, and FT-IR spectroscopy. The acidities of the catalysts were measured through the absorption of anthraquinone and pyridine probe molecules using EPR and IR spectroscopy, respectively. Catalytic activity and selectivity were investigated for ethanol conversion to acetaldehyde, ethylene, and diethyl ether, which were used as model reactions to identify surface-active sites. The relationship between the surface structure and the dehydration/dehydrogenation activity was evaluated. Diethyl ether formation is promoted by the presence of the ZrO 2 tetragonal phase at a low ZrO 2 /Al 2 O 3 ratio in the sample composition, at which the Lewis acid site has an aluminum-oxygen environment. The reaction mechanism was also discussed. In the low-temperature reaction region, dehydrogenation competes with dehydration; ethylene and acetaldehyde share a common reactive intermediate.

show abstract

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Selectivity of Ethanol Conversion on Al/Zr/Ce Mixed Oxides: Dehydration and Dehydrogenation Pathways Based on Surface Acidity Properties

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Ethanol has many practical applications in the (petro)chemical industry such as (i) solvent, (ii) additive to gasoline, and (iii) renewable raw material for production of other chemicals, ethanal, 1 esters, ethylene, 2 higher alcohols, higher hydrocarbons, and more, which are usually produced from crude oil. 3,4 Esters represent a solvent for paint, organic compounds in the food and beverage industry, and also a substitute of aromatic compounds in many applications. 5 For example, toluene can be replaced by ethyl acetate, which is less toxic and environmentally more friendly.…”

Section: Introductionmentioning

confidence: 99%

Transition Metal-Promoted Mg-Fe Mixed Oxides for Conversion of Ethanol to Valuable Products

et al. 2023

View full text Add to dashboard Cite

The conversion of ethanol into petrochemicals, such as ethyl and butyl acetate, butanol, hexanol, and so forth was studied. The conversion was catalyzed by Mg-Fe mixed oxide modified with a second transition metal (Ni, Cu, Co, Mn, or Cr). The main aim was to describe the influence of second transition metal on (i) the catalyst itself and (ii) reaction products such as ethyl acetate, butanol, hexanol, acetone, and ethanal. Moreover, the results were compared with the results of pure Mg-Fe. The reaction was carried out in the gas phase in a flow reactor with a weight hour space velocity of 4.5 h–1 for 32 h at three reaction temperatures (280, 300, and 350 °C). The metals Ni and Cu in Mg-Fe oxide enhanced the ethanol conversion due to the population of active dehydrogenation sites. Despite the lower acido-basicity, Cu, Co, and Ni supported the yield of ethyl acetate, and Cu and Ni also promoted the yield of higher alcohols. Ni was related to the extent of the gasification reactions. Moreover, long-term stability (by leaching of metals) test was carried out for all catalysts (128 h).

show abstract

“…2 Various bimetallic, trimetallic, and conducting polymers have been tested in order to develop more active, robust, and low-cost catalysts to replace Pt in the cathode for the oxygen reduction reaction (ORR). Many nanoparticles, such as Pt, [25][26][27][28][29][30][31][32][33][34][35] Au, [36][37][38][39] Pd, 40,41 Cu, [42][43][44][45][46][47][48][49][50][51][52][53][54] Ag, [55][56][57] Ir, [58][59][60] Ru, 61 and alloys [62][63][64][65][66][67][68][69][70][71][72][73]…”

Section: Introductionmentioning

confidence: 99%

DFT Studies of Pt8V4Fe14 Nanoparticles and the O2 Adsorption

Toth

Wang

2023

Preprint

View full text Add to dashboard Cite

The ability to produce cheap and efficient catalysts for oxygen reduction is essential for cost reduction in fuel cells. This work reports the density functional theory (DFT) results of the investigation of ~1 nm trimetallic nanocatalysts of 26 atoms with a composition of Pt8V4Fe14. The relative stability of ~50 Pt8V4Fe14 nanoparticles (NPs) were analyzed to conclude that the most stable NPs had vanadium atoms located at the center of the NP with scattered platinum atoms attached to them from the outside. Adsorption of O2 on the most stable nanocatalyst was also analyzed at 14 various adsorption sites; it was determined that oxygen preferred to bond to vanadium and iron atoms located at the surface of the NP. Compared to the small sub-nanometer PtVFe clusters of the same composition, the O2 adsorption strength is slightly decreased on the ~1nm PtVFe NPs. These findings provided important insights into the effectiveness of PtVFe nanocatalysts towards oxygen reduction.

show abstract

Study of Cu modified Zr and Al mixed oxides in ethanol conversion: The structure-catalytic activity relationship

Cited by 11 publications

References 38 publications

Selectivity of Ethanol Conversion on Al/Zr/Ce Mixed Oxides: Dehydration and Dehydrogenation Pathways Based on Surface Acidity Properties

Selectivity of Ethanol Conversion on Al/Zr/Ce Mixed Oxides: Dehydration and Dehydrogenation Pathways Based on Surface Acidity Properties

Transition Metal-Promoted Mg-Fe Mixed Oxides for Conversion of Ethanol to Valuable Products

DFT Studies of Pt8V4Fe14 Nanoparticles and the O2 Adsorption

Contact Info

Product

Resources

About