Aqueous hydrogenolysis of glycerol over Ni–Ce/AC catalyst: Promoting effect of Ce on catalytic performance

Yu, Weiqiang; Zhao, Jiuzhou; Ma, Hong; Miao, Hong; Song, Qi; Xu, Jie

doi:10.1016/j.apcata.2010.05.023

Cited by 89 publications

(51 citation statements)

References 24 publications

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“…This behavior demonstrated that the incorporation of ceria decreased the reduction temperature of metal oxides species and caused a strong interaction with the active components and support. Yu reported that cerium addition to Ni/AC catalyst would decrease the reduction temperature and facilitate the hydrogenation of acetol [19]. Ye et al [27] also found that the introduction of cerium to the Ni/Al 2 O 3 catalysts slightly lowered the reduction temperature of nickel oxides but considerably enhanced the H 2 -chemisorption amount.…”

Section: Physicochemical Propertiesmentioning

confidence: 91%

“…On the other hand, promoters including alkali metal oxides and rare-earth metal oxides were usually introduced into the catalysts to improve the catalytic performance. Yu et al [19,20] prepared a type of Ni/AC catalyst and investigated the promoting effect of cerium on glycerol hydrogenolysis. The glycerol conversion could reach 90.4 % at 200°C under 5 MPa of H 2 .…”

Section: Introductionmentioning

confidence: 99%

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Hydrogenolysis of glycerol aqueous solution to glycols over Ni–Co bimetallic catalyst: effect of ceria promoting

Jiang

Kong

et al. 2015

Appl Petrochem Res

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A series of Ni-Co bimetallic catalysts supported on c-Al 2 O 3 with different Ni/Co mass ratio were prepared by incipient wetness impregnation method for glycerol hydrogenolysis. The catalyst with a Ni/Co mass ratio of 1:3 (denoted as Ni 1 Co 3 ) exhibited the highest conversion. The performance was compared with that of catalysts promoted by Ce. Moreover, the addition of Ce showed a remarkable promoting effect on the catalytic performance when the cerium content was 2.5 wt%. The physicochemical properties of the supported Ni-Co catalysts were characterized by N 2 physisorption, XRD, H 2 -TPR, NH 3 -TPD, XPS and TEM. H 2 -TPR profiles revealed that the coexistence of Ni and Co components on support changed the respective reduction behavior of Ni or Co alone, showing the synergistic effect between Ni and Co species. Compared with the TPR profiles of Ni 1 Co 3 , it was clearly observed that the reduction peak of nickel oxide and/or cobalt oxide shifted down to the lower temperature zone gradually with the addition of Ce. It was most probable that the addition of Ce favored the formation of the strong interaction between metal species and ceria. The TEM images showed that the addition of Ce component could improve the dispersion of Ni-Co species on support and inhibited the agglomeration of metal particles during the reaction process, which might be responsible for the enhanced stability.

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Section: Physicochemical Propertiesmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Hydrogenolysis of glycerol aqueous solution to glycols over Ni–Co bimetallic catalyst: effect of ceria promoting

Jiang

Kong

et al. 2015

Appl Petrochem Res

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“…The hydrogenolysis of glycerol to propanediol is a promising option [1,2]. Until now, supported Cu [3], Co [4], Ni [5], Ru [6], Pt [7], Rh [8] and Ir [9] catalysts have been reported to be active towards glycerol hydrogenolysis. However, the sintering of the metal particles during the course of the reaction often resulted in catalyst deactivation [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Guo

Song

et al. 2011

Catal Lett

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Co catalysts, obtained from a layered double Co-Zn-Al hydroxide, are highly active and stable towards the hydrogenolysis of glycerol to 1,2-propanediol (1,2-PDO) in aqueous media. The Co-673 catalyst, containing a CoO species, provided a glycerol conversion of 67.7% and a 1,2-PDO selectivity of 50.5%. The Co-873 catalyst comprising 16 nm Co nanoparticles gave a glycerol conversion of 70.6% and a 1,2-PDO selectivity of 57.8%. It was revealed that the CoO species in the Co-673 catalyst was readily converted to 50 nm Co particles under the glycerol hydrogenolysis conditions. The Co catalysts maintained a stable size and phase in recycling tests.

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“…Cu(14%)/Al 2 O 3 muestra dos picos de consumo de H 2 indicando la presencia de dos fases de Cu, una α y otra β, lo cual está de acuerdo con datos previos reportados [12]. Las especies de Cu incorporadas comienzan a reducirse a 170°C, presentando el pico principal su máximo centrado a 200-250ºC, según el soporte.…”

Section: Resultados Y Discusionunclassified

Catalizadores de cobre soportado parareducción selectiva de glicerol

Ferrari¹,

Comelli²

2015

Matéria (Rio J.)

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RESUMENLa industria del biodiesel ha traído aparejada una oferta creciente de glicerol, el cual es el subproducto del proceso, generando una caída de su precio. La transformación del glicerol en compuestos con valor agregado interesa pues mejoraría la ecuación económica global de la producción del biocombustible permitiendo un desarrollo ambiental sustentable al utilizar materia prima renovable. En Argentina, la provincia de Santa Fe tiene una capacidad instalada de 2,5 millones de toneladas/año de biodiesel, con las consiguientes 250.000 tn/año de glicerol, por lo que la temática es de sumo interés para el medio socio-productivo regional. Una ruta para valorizar el glicerol es a través de la reacción catalítica de hidrogenólisis, mejor llamada reducción selectiva, para obtener propanodioles. Catalizadores del tipo metal soportado fueron reportados como activos para conducir la hidrogenólisis en fase líquida, encontrando escasa información para la reacción en fase gas. Por este motivo, se prepararon catalizadores del tipo Metal/Soporte por impregnación por humedad incipiente, siendo evaluados en fase líquida en un sistema con reactor de acero inoxidable y operación semicontinua y en fase gas en un sistema continuo con reactor de lecho fijo y flujo descendente. La reacción se siguió por cromatografía de gases, siendo en línea para la fase no condensada. El rango de condiciones de operación evaluado fue 170-240°C y presiones 1-30 kg cm -2 . Para fase líquida, los niveles de actividad y selectividad a 1,2-propanodiol alcanzados fueron similares a los reportados, mejorando la conversión con el incremento de temperatura y presión. Para fase gas, conversión y selectividad fueron fuertemente influenciadas por las condiciones de reacción, siendo el principal co-producto el acetol, indicado como intermediario de la reacción. Los materiales que presentaron mejor comportamiento fueron caracterizados por RTP, DRX y FTIR para determinar sus características, relacionar la actividad catalítica y optimizar la preparación.Palabras clave: Glicerol, Propanodioles, Cu/Alúmina, Cu/Ferrierita, Cromita de cobre. ABSTRACTThe biodiesel industry has brought with it an oversupply of glycerol, which is the byproduct of the process, generating a fall in its price. The transformation of glycerol into value-added compounds interest as it would improve the overall economic balance of biofuel production enabling environmentally sustainable development by using renewable raw material. In Argentina, the province of Santa Fe has an installed capacity of 2.5 million TM/year of biodiesel, with consequent 250,000 TM/year of glycerol, so the topic is of great interest to the regional socio-productive means. One route to valorize glycerol is the catalytic hydrogenolysis reaction, better called selective reduction, to obtain propanediols. Metal supported catalysts were reported as assets to drive the liquid phase hydrogenolysis, finding little information for the gas phase reaction. For this reason, Metal/Support type catalysts were prepared by impregna...

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Aqueous hydrogenolysis of glycerol over Ni–Ce/AC catalyst: Promoting effect of Ce on catalytic performance

Cited by 89 publications

References 24 publications

Hydrogenolysis of glycerol aqueous solution to glycols over Ni–Co bimetallic catalyst: effect of ceria promoting

Hydrogenolysis of glycerol aqueous solution to glycols over Ni–Co bimetallic catalyst: effect of ceria promoting

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Catalizadores de cobre soportado parareducción selectiva de glicerol

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