Selective Hydrogenation of Benzene to Cyclohexene Over Colloidal Ruthenium Catalyst Stabilized by Silica

Ning, Jianbo; Xu, Jie; Liu, Jing; Lu, Fang

doi:10.1007/s10562-006-0075-1

Cited by 66 publications

(40 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8a. It is well considered that higher dispersion of ruthenium leads to higher hydrogenation activity, as well as the improvement of cyclohexene selectivity for the catalyst calcined at lower temperature due to the small size of ruthenium crystallite [26]. Notably, the slight decrease of the selectivity at lower temperature in our work could be explained by the higher concentration of cyclohexene in the oil phase, which led to enhanced mass transfer of cyclohexene from the oil phase to catalyst surface and sacrificed the beneficial effect of the small grain size on the selectivity.…”

Section: Effect Of the Calcination Temperature Of Ruthenium Catalystmentioning

confidence: 99%

Preparation and Characterization of Ru/Al2O3/Cordierite Monolithic Catalysts for Selective Hydrogenation of Benzene to Cyclohexene

et al. 2009

View full text Add to dashboard Cite

A series of Ru/Al 2 O 3 /cordierite monolithic catalysts were prepared and characterized by BET, XRD, TPR, TEM and SEM-EDAX. The catalytic performances in selective hydrogenation of benzene to cyclohexene were investigated in a continuous fixed-bed reactor. The preparation conditions significantly influence morphology, particle size, and surface area of the catalyst, subsequently affecting the catalytic performances. It was found that higher calcination temperature of the Ru-based monolithic catalyst led to the conglomeration and crystallite growth of the t-RuO 2 , which will decrease the catalytic activity. The lower thickness and the larger pore size of the alumina washcoating layer are the preferential choices to obtain higher cyclohexene selectivity due to the improved internal mass transfer of cyclohexene. It was also found that high ruthenium loading resulted in deep hydrogenation of cyclohexene. Moreover, the reduction temperature was optimized to 473 K and excess high temperature led to the deterioration of both activity and cyclohexene selectivity.

show abstract

Section: Effect Of the Calcination Temperature Of Ruthenium Catalystmentioning

confidence: 99%

Preparation and Characterization of Ru/Al2O3/Cordierite Monolithic Catalysts for Selective Hydrogenation of Benzene to Cyclohexene

et al. 2009

View full text Add to dashboard Cite

show abstract

“…In recent years, great progress has been made in this field. Ning et al 6 prepared Ru-SiO 2 catalysts by microemulsion processing and obtained a maximum cyclohexene yield of 42%. Liu et al 7 prepared a Ce-promoted Ru/SBA-15 catalyst by a "two solvents" impregnation method and achieved a cyclohexene yield of 53.8%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Organic Additives on the Performance of Nano‐sized Ru‐Zn Catalyst

et al. 2011

View full text Add to dashboard Cite

A novel Ru-Zn catalyst was prepared by coprecipitation. The catalyst was characterized by XRF, XRD and TEM. The effects of organic additives on the performance of the Ru-Zn catalyst for benzene selective hydrogenation to cyclohexene were investigated. The results showed that the catalyst was composed of Ru and Zn in molar ratio of 33.8∶1, and the most probable value of the Ru crystallite size in the catalyst was 5.1 nm. The modification of Ru with Zn and the small size effect were the main cause why the catalyst exhibited the high activity and the excellent cyclohexene selectivity. When PEG (polyethylene glycol) was used as an additive, the activity of the catalyst decreased, and the cyclohexene selectivity increased with the increase of the PEG molecular weight. With the addition of PEG-20000, a cyclohexene selectivity of 78.9% at a benzene conversion of 68.7% and a maximum cyclohexene yield of 61.4% were obtained. With diethanolamine and triethanolamine as additives, cyclohexene yields were as high as 58.9% and 58.2%, respectively.

show abstract

“…It was shown that the increased levels of partially hydrogenated products were due in part to the higher solubility of the diene relative to the monoene in the IL, which results in its spontaneous elimination from the catalyst phase [34]. Partial reduction of benzene also has been reported using nanoparticle catalysts in ILs [35,36]. Because far more active catalysts are required to hydrogenate arenes compared with alkenes, by virtue of the need to break the aromaticity, suppressing further hydrogenation is a considerable challenge and results in somewhat lower selectivity toward the partial hydrogenation product compared with dienes; for example, cyclohexadiene can be converted to cyclohexene with a selectivity of 96% with high conversion [31].…”

Section: Hydrogenation Of Benzene and Arene Derivativesmentioning

confidence: 99%

Ionic-liquid-like copolymer stabilized nanocatalysts in ionic liquids: II. Rhodium-catalyzed hydrogenation of arenes

Zhao

Wang

Yan

et al. 2007

Journal of Catalysis

View full text Add to dashboard Cite

Selective Hydrogenation of Benzene to Cyclohexene Over Colloidal Ruthenium Catalyst Stabilized by Silica

Cited by 66 publications

References 30 publications

Preparation and Characterization of Ru/Al2O3/Cordierite Monolithic Catalysts for Selective Hydrogenation of Benzene to Cyclohexene

Preparation and Characterization of Ru/Al2O3/Cordierite Monolithic Catalysts for Selective Hydrogenation of Benzene to Cyclohexene

Effect of Organic Additives on the Performance of Nano‐sized Ru‐Zn Catalyst

Ionic-liquid-like copolymer stabilized nanocatalysts in ionic liquids: II. Rhodium-catalyzed hydrogenation of arenes

Contact Info

Product

Resources

About