An efficient Fe2O3/HY catalyst for Friedel–Crafts acylation of m-xylene with benzoyl chloride

RSC Advances ◽  
2014 ◽  
Vol 4 (70) ◽  
pp. 36951-36958 ◽  
Author(s):  
Manman Mu ◽  
Ligong Chen ◽  
Yunlong Liu ◽  
Wangwang Fang ◽  
Yang Li
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Benzoyl Chloride ◽  
Catalytic Performance ◽  
Reaction Parameters ◽  
Hy Zeolite ◽  
Lewis Acidic Sites ◽  
Acidic Sites ◽  
Excellent Catalytic Performance

Iron oxide supported on HY zeolite was prepared and exhibited excellent catalytic performance in the acylation of m-xylene with benzoyl chloride. It was characterized by XRD, BET, XPS, NH3-TPD and Py-IR. The catalytic activity of Fe2O3/HY is enhanced with the increase of Lewis acidic sites. Furthermore, the reaction parameters were optimized. Finally, the catalyst was easily separated reused for five runs without appreciable loss of catalytic activity.

scholarly journals Effect of Fe Additives on the Catalytic Performance of Ion-Exchanged CsX Zeolites for Side-Chain Alkylation of Toluene with Methanol

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 829 ◽  
Author(s):  
Zhang ◽  
Yuan ◽  
Miao ◽  
Li ◽  
Shan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
High Yield ◽  
Side Chain ◽  
Impregnation Method ◽  
Basic Sites ◽  
Lewis Acidic Sites ◽  
X Zeolite ◽  
Acidic Sites ◽  
Negative Effect

The side-chain alkylation of toluene with methanol was investigated over some Fe-modified Cs ion-exchanged X zeolite (CsX) catalysts prepared via the impregnation method using different iron sources. The absorption/activation behaviors of the reactants on the surface of the catalysts were studied by in situ Fourier-transform infrared (FT-IR) spectroscopy and temperature programmed desorption (TPD) mass measurements. Modification of CsX with a small amount of FeCl3 could result in a considerable decrease in catalytic activity, due mainly to the remarkable decrease in the density of acidic and basic sites of the catalysts. Interestingly, the Fe(NO3)3-modified CsX with an optimum Fe loading of 0.15 wt.% shows improved catalytic activity and high yield compared to the side-chain alkylation products. Modification of CsX with Fe(NO3)3 could also result in a decrease in basic sites of the catalyst. However, such a change does not bring an obvious negative effect on the adsorption/activation of toluene, while it could effectively inhibit the generation of the undesired bidentate formate. Furthermore, the introduced FeOx species (derived from the decomposition of Fe(NO3)3) may also act as new Lewis acidic sites to participate in the activation of methanol and to stabilize the formed active intermediates (i.e., unidentate formate). Therefore, modification of CsX with a suitable amount of Fe(NO3)3 may adjust its adsorption/activation ability for reagents by changing the acid–base properties of the catalyst, which can finally enhance the catalytic performance for the side-chain alkylation of toluene with methanol.

Unique mesoporous amorphous manganese iron oxide with excellent catalytic performance for benzene abatement under UV-vis-IR and IR irradiation

2019 ◽  
Vol 6 (4) ◽  
pp. 1233-1245
Author(s):  
Cheng Chen ◽  
Yuanzhi Li ◽  
Yi Yang ◽  
Qian Zhang ◽  
Jichun Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Catalytic Performance ◽  
Excellent Catalytic Performance

Mesoporous amorphous manganese iron oxide exhibits excellent catalytic activity with UV-vis-IR and IR irradiation due to light-driven thermocatalysis and novel photoactivation.

Facile preparation of a hierarchically porous metal–organic nanocomposite with excellent catalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97399-97403 ◽  
Author(s):  
Rui Kuang ◽  
Luyi Zheng ◽  
Ethan Cottrill ◽  
Ning Pan ◽  
Yanhui Chi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aging Process ◽  
Porous Metal ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Hierarchically Porous ◽  
Hierarchical Porous ◽  
Metal Organic ◽  
Facile Preparation ◽  
Excellent Catalytic Performance

A hierarchical porous MOF nanocrystal, hpCuL (L = 2,4,6-tris(3,5-dicarboxylatephenylamino)-1,3,5-triazine) was prepared via a facile gel-aging process. This nanocomposite exhibits high catalytic activity and stability for the reduction of 4-nitrophenol.

Pd nanoparticles stabilized with phosphine-functionalized porous ionic polymer for efficient catalytic hydrogenation of nitroarenes in water

2020 ◽  
Vol 44 (9) ◽  
pp. 3681-3689 ◽  
Author(s):  
Yizhu Lei ◽  
Zaifei Chen ◽  
Guosong Lan ◽  
Renshu Wang ◽  
Xiao-Yu Zhou
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Ionic Polymer ◽  
Electron Donation ◽  
Nano Size ◽  
Excellent Catalytic Performance

Small palladium nanoparticles stabilized with phosphine-functionalized PIP displayed high catalytic activity for nitroarenes hydrogenation. Nano-size Pd particles, electron-donation effect of phosphine ligand, and surface wettability account for its excellent catalytic performance.

One-Step FSP Synthesis of Nanocrystalline Fe/Al2O3 and Fe-Ce/Al2O3 Catalyst for CO2 Hydrogenation Reaction

2018 ◽  
Vol 916 ◽  
pp. 134-138 ◽  
Author(s):  
Kanyarat Piriyasurawong ◽  
Sunthon Piticharoenphun ◽  
Okorn Mekasuwandumrong
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Flame Spray ◽  
One Step ◽  
Temperature Programmed ◽  
The One ◽  
Long Chain ◽  
Chain Hydrocarbon

Nanocrystalline Fe/Al2O3and Fe-Ce/Al2O3catalysts doped with various amounts of cerium were prepared using the one-step flame spray pyrolysis (FSP) technique. The characterization of the catalysts was measured by several methods such as X-ray diffraction, nitrogen physisorption and hydrogen temperature programmed reduction (H2-TPR) techniques. The results revealed that the FSP-made catalyst exhibited the characteristic pattern of FeAl2O4phase without any phases of aluminum or iron oxide. In addition, cerium (Ce) dopant did not alter crystal structure at low content. However, 7 wt% content of cerium dopant resulted in the formation of ceria (CeO) and iron oxide (Fe2O3) phase. The catalytic performance of the FSP-made catalyst was tested in carbon dioxide hydrogenation for selective production of long chain hydrocarbon, and was compared to conventional impregnation-made catalysts. In the comparison, the FSP-made catalyst exhibited lower catalytic activity but possessed a higher long chain hydrocarbon selectivity. After doping with Ce, the catalytic activity was improved while the hydrocarbon selectivity was decreased and shifted to the short chain hydrocarbon product. In the case of conventional-made catalysts, the activity remained unchanged but the hydrocarbon selectivity was decreased. Among all catalysts, the FSP-made Fe-Ce/Al2O3catalyst with 3% Ce-promoted catalyst exhibited the best performance in terms of selectivity to long chain hydrocarbon.

A DFT study on direct benzene hydroxylation catalyzed by framework Fe and Al sites in zeolites

2014 ◽  
Vol 4 (8) ◽  
pp. 2490-2493 ◽  
Author(s):  
Gang Yang ◽  
Lijun Zhou
Keyword(s):  
Catalytic Activity ◽  
Dft Study ◽  
Benzene Hydroxylation ◽  
Lewis Acidic Sites ◽  
Acidic Sites

Framework Fe rather than Al Lewis acidic sites in zeolites are demonstrated to show superior catalytic activity for benzene hydroxylation.

Fabrication of hollow Cu2O@CuO-supported Au–Pd alloy nanoparticles with high catalytic activity through the galvanic replacement reaction

2015 ◽  
Vol 3 (8) ◽  
pp. 4578-4585 ◽  
Author(s):  
Wang Yao ◽  
Fei-Long Li ◽  
Hong-Xi Li ◽  
Jian-Ping Lang
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
Galvanic Replacement ◽  
High Catalytic Activity ◽  
Alloy Nanoparticles ◽  
Galvanic Replacement Reaction ◽  
Replacement Reaction ◽  
Pd Alloy ◽  
Excellent Catalytic Performance

Cu2O@CuO-supported Au–Pd alloy nanoparticles prepared through the galvanic replacement approach exhibit an excellent catalytic performance in reducing 4-nitrophenol to 4-aminophenol.

scholarly journals Nanochannel-based heterometallic {ZnIIHoIII}–organic framework with high catalytic activity for the chemical fixation of CO2

RSC Advances ◽  
2021 ◽  
Vol 11 (16) ◽  
pp. 9731-9739
Author(s):  
Tao Zhang ◽  
Hongtai Chen ◽  
Hongxiao Lv ◽  
Qiaoling Li ◽  
Xiutang Zhang
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Chemical Fixation ◽  
Efficient Detection ◽  
Honeycomb Material ◽  
Excellent Catalytic Performance ◽  
Organic Framework

The robust, double-walled, honeycomb material {[ZnHo(TDP)(H2O)]·2DMF·4H2O}n exhibits an excellent catalytic performance in the chemical fixation of CO2 and the efficient detection of Fe(iii) ions in aqueous solution.

Magnesium Hydrogen Phosphate: An Efficient Catalyst for Acrylic Acid Production from Biorenewable Lactic Acid

2021 ◽  
Vol 21 (3) ◽  
pp. 1537-1548
Author(s):  
Nagaraju Nekkala ◽  
Putrakumar Balla ◽  
Srinivasarao Ginjupalli ◽  
Harisekher Mitta ◽  
S. K. Hussain ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acrylic Acid ◽  
Biomass Conversion ◽  
Catalytic Performance ◽  
Hydrogen Phosphate ◽  
Efficient Catalyst ◽  
Synthetic Process ◽  
Calcination Temperatures ◽  
Lewis Acidic Sites ◽  
Acidic Sites

A series of Magnesium hydrogen phosphate (MgHP) catalysts with different magnesium to phosphorous (Mg/P) mole ratios at varying calcination temperatures has been synthesised, bearing in mind the effectiveness as well as the stability of MgHP to catalyse acrylic acid (AA) production from biorenewable lactic acid (LA), a synthetic process applicable to biomass conversion. The physicochemical properties of the MgHP catalysts have been thoroughly characterised and the formation of Mg(NH4)PO4, MgHPO4 and Mg2P2O7 with different structural and acidic properties have been reported. The high catalytic performance of MgHP catalysts with high AA yields (100% conversion and 85% selectivity) at high space velocities (WHSVLA = 3.13 h−1) have been achieved at 360 °C. NH3-Temperature programmed desorption (TPD) and pyridine FTIR have shown that the effectiveness of a catalyst is accounted for not primarily by the actual strength of acidic sites, but is due to the presence of Lewis acidic sites compared to Bronsted sites.

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