Effect of Base Additives on the Selective Hydrogenolysis of Glycerol over Ru/TiO2 Catalyst

Feng, Jian; Wang, Jinbo; Zhou, Yafen; Fu, Haiyan; Chen, Hua; Li, Xianjun

doi:10.1246/cl.2007.1274

Cited by 86 publications

(52 citation statements)

References 15 publications

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“…The presence of NaOH resulted in a significant increase in the glycerol conversion from 5.2% to 22%, suggesting that the base can serve as a co-catalyst in the hydrogenolysis of glycerol. This agrees well with results obtained in literature by different catalysts under basic conditions, as an increase in the catalyst activity was expected in the [6,30]. In addition, a remarkable change in the selectivity of 1,2-PD, H-AC, AC, and EG was observed.…”

Section: Effect Of Stirring Speedsupporting

confidence: 92%

Hydrogenolysis of Glycerol over γ-Al2O3-Supported Iridium Catalyst

Ahmed

Abdelaziz

Roberts

2017

Period. Polytech. Chem. Eng.

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In recent years, much attention has been focused on the hydrogenolysis of biodiesel derived glycerol to other high IntroductionThe fluctuating increasing oil prices and the increased world-wide environmental concerns towards minimizing CO 2 emissions tend to highlight the necessity of renewable resources. Biodiesel derived from renewable resources comprising, for instance, vegetable oils and animal fats has attracted great attention recently. Glycerol is considered to be the main byproduct that results during biodiesel production. Nevertheless, increases in the production of glycerol from biodiesel refining accompanied with the tight markets of glycerol supply and demand created a glut in the glycerol market. This resulted in a significant fall in the glycerol price and limited options for glycerol byproduct management are hence available to biodiesel refiners [1]. Thus, finding solutions for the effective utilization of glycerol waste is crucial to achieve both economic and environmental benefits. Consequently, this will turn the biofuel producers to view the byproduct as a valuable resource for their own production processes instead of viewing glycerin as a waste [2,3].Over the past decades, the hydrogenolysis of higher polyols like sorbitol, xylitol, and glycerol has been investigated in literature [4,5]. Recently, the hydrogenolysis of glycerol into value-added chemicals emerged as an attractive process for glycerol valorization [6,7]

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Section: Effect Of Stirring Speedsupporting

confidence: 92%

Hydrogenolysis of Glycerol over γ-Al2O3-Supported Iridium Catalyst

Ahmed

Abdelaziz

Roberts

2017

Period. Polytech. Chem. Eng.

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“…In fact, there may be a competition of cleavage between the C-O bonds and C-C bonds. Many reports proposed and confirmed that glycerol hydrogenolysis was conducted by dehydration/hydrogenation mechanism [33][34][35] as shown in Fig. 11.…”

Section: Catalytic Performance Of Ni-co Catalysts and Ce Promoted Ni mentioning

confidence: 81%

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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“…Catalyst systems involving various compositions of copper chromite as well as supported noble metals have been reported for the conversion of glycerol to 1,2-PDO in presence of a solvent under high pressure and temperature conditions [9,[16][17][18]. Among noble metals, Pd, Pt, Ru and Rh have been used on various supports for the hydrogenolysis of glycerol [19,20]. Castle and Gomez first described glycerol hydrogenolysis using copper and zinc catalyst as well as sulfided Ru catalyst under very high pressure and temperature conditions (15 MPa; 513-545 K) with 75-85% selectivity to 1,2-PDO while [25% were cracked products such as EG, ethanol, methanol and lactic acid [21,22].…”

Section: Introductionmentioning

confidence: 99%

Cu:Al Nano Catalyst for Selective Hydrogenolysis of Glycerol to 1,2-Propanediol

et al. 2010

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Non-chromium Cu:Al nano catalyst prepared by simultaneous co-precipitation and digestion method without any template or stabilizer, showed three times higher activity than the bulk Cu-Cr catalyst for hydrogenolysis of glycerol in both isopropanol and water solvents, with the selectivity to 1,2-Propanediol (1,2-PDO) as high as 91% at 493 K and H 2 pressure of 7 MPa in 5 h. XRD pattern showed the presence of Cu ? species in the activated Cu:Al nano catalyst. Although Cu ? is catalytically inactive in glycerol hydrogenolysis reaction, the presence of Cu ? helps to stabilize the particle size in a narrow range of 7-11 nm by inhibiting the sintering of copper particles under reaction conditions.

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Effect of Base Additives on the Selective Hydrogenolysis of Glycerol over Ru/TiO2 Catalyst

Cited by 86 publications

References 15 publications

Hydrogenolysis of Glycerol over γ-Al2O3-Supported Iridium Catalyst

Hydrogenolysis of Glycerol over γ-Al2O3-Supported Iridium Catalyst

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

Cu:Al Nano Catalyst for Selective Hydrogenolysis of Glycerol to 1,2-Propanediol

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