Hydrogenation of xylose to xylitol on sponge nickel catalyst: a study of the process and catalyst deactivation kinetics

Mikkola, Jyri Pekka; Salmi, Tapio; Villela, Alexandre; Vainio, H.; Mäki‐Arvela, Päivi; Kalantar, Ahmad; Ollonqvist, Tapio; Väyrynen, J.; Sjöholm, Rainer

doi:10.1590/s0104-66322003000300006

Cited by 16 publications

(10 citation statements)

References 3 publications

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“…Two factors could account for the dispersion effect of the ultrasound. On one hand, the mechanical effect originated from the asymmetric collapse of bubbles near the liquid-solid phase boundary disrupts the interface and impels jets of liquid into the surface of catalyst, [32][33][34][35] leading to the grind of the Ru-B samples to become smaller particles, revealing new, previously unexposed surface and therefore, to result in a dramatic increase in the surface area. On the other hand, the presence of much oxidized boron produced during the ultrasonication process can make the Ru-B alloy more highly dispersed, which increases the BET area.…”

Section: Effect Of Ultrasonic Irradiation On the Catalytic Performancementioning

confidence: 99%

Ultrasound‐assisted Cinnamaldehyde Hydrogenation to Cinnamyl Alcohol at Atmospheric Pressure over Ru‐B Amorphous Catalyst

2006

Chin. J. Chem.

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The ultrafine Ru-B amorphous alloy catalyst was prepared by chemical reduction with KBH 4 . During liquid phase hydrogenation of cinnamaldehyde at atmospheric pressure, the Ru-B catalyst prepared exhibited excellent selectivity to cinnamyl alcohol. When the hydrogenation was performed with ultrasonic irradiation, the reaction rate could be greatly enhanced while the selectivity to cinnamyl alcohol remained almost unchanged. The hydrogenation rate was increased with the increase of either the ultrasonic frequency or the irradiation time. According to various characterizations, such as XRD, XPS, TEM, BET and ICP, the effect of ultrasonic irradiation on the structural and electronic characteristics of Ru-B catalyst was studied briefly. Meanwhile, the promotion effect of ultrasonication on the catalytic performance was also discussed based on the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol.

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Section: Effect Of Ultrasonic Irradiation On the Catalytic Performancementioning

confidence: 99%

Ultrasound‐assisted Cinnamaldehyde Hydrogenation to Cinnamyl Alcohol at Atmospheric Pressure over Ru‐B Amorphous Catalyst

2006

Chin. J. Chem.

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“…The catalytic conversion of naturally occurring sugars, such as xylose and glucose, into their corresponding sugar alcohols is an attractive pathway for the production of value added chemicals, such as sweeteners and pharmaceutical intermediates [1][2][3][4][5][6][7][8][9][10][11]. Xylitol is an important artificial sweetener and has been widely used in various fields [12][13][14][15][16]. At present, the production of xylitol proceeds mainly through the reduction reaction of xylose derived from the hydrolysis of corncob [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Efficient Hydrogenation of Xylose and Hemicellulosic Hydrolysate to Xylitol over Ni-Re Bimetallic Nanoparticle Catalyst

Xia

Zhang

et al. 2019

Nanomaterials

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A disadvantage of the commercial Raney Ni is that the Ni active sites are prone to leaching and deactivation in the hydrogenation of xylose to xylitol. To explore a more stable and robust catalyst, activated carbon (AC) supported Ni-Re bimetallic catalysts (Ni-Re/AC) were synthesized and used to hydrogenate xylose and hemicellulosic hydrolysate into xylitol under mild reaction conditions. In contrast to the monometallic Ni/AC catalyst, bimetallic Ni-Re/AC exhibited better catalytic performances in the hydrogenation of xylose to xylitol. A high xylitol yield up to 98% was achieved over Ni-Re/AC (n Ni :n Re = 1:1) at 140 • C for 1 h. In addition, these bimetallic catalysts also had superior hydrogenation performance in the conversion of the hydrolysate derived from the hydrolysis reaction of the hemicellulose of Camellia oleifera shell. The characterization results showed that the addition of Re led to the formation of Ni-Re alloy and improved the dispersion of Ni active sites. The recycled experimental results revealed that the monometallic Ni and the bimetallic Ni-Re catalysts tended to deactivate, but the introduction of Re was able to remarkably improve the catalyst's stability and reduce the Ni leaching during the hydrogenation reaction.

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“…Mikkola et al also reported that catalyst deactivation is more rapid in water than in aqueous ethanol, and the treatment of the catalyst with hydrogen and ethanol was found to diminish the deactivation [12]. Mikkola et al additionally demonstrated that the mass transfer of the hydrogen from the gas to the liquid phase was faster when aqueous alcohol mixtures were used as the solvent [30]. Furthermore, aqueous ethanol allows more hydrogen to be dissolved, thus affecting the overall hydrogenation rate [12].…”

Section: Hydrogenation In a Continuous-flow Apparatusmentioning

confidence: 99%

Treatments of Lignocellulosic Hydrolysates and Continuous‐Flow Hydrogenation of Xylose to Xylitol

Fehér

Rozbach

et al. 2017

Chem Eng & Technol

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Xylitol is produced by the heterogeneous catalytic hydrogenation of xylose over Raney nickel. The hydrogenation must typically be followed by several purification steps, which makes the chemical production relatively complex and expensive. In this study, activated carbon and bio-purification treatments of corn stover hydrolysates and subsequent nickel-catalyzed hydrogenation of xylose to xylitol were investigated. The activated carbon treatment was used to eliminate inhibitory compounds and increase the efficiency of the bio-purification step. It was found that the glucose could be completely eliminated from the hydrolysate. The hydrogenation reactions of corn stover hydrolysate demonstrated that a high reaction temperature resulted in high sugar alcohol yields and selectivity. At a given temperature, the flow rate had no significant effect on xylitol yield. Figure 1. Hydrogenation of xylose to xylitol over Raney nickel.

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Hydrogenation of xylose to xylitol on sponge nickel catalyst: a study of the process and catalyst deactivation kinetics

Cited by 16 publications

References 3 publications

Ultrasound‐assisted Cinnamaldehyde Hydrogenation to Cinnamyl Alcohol at Atmospheric Pressure over Ru‐B Amorphous Catalyst

Ultrasound‐assisted Cinnamaldehyde Hydrogenation to Cinnamyl Alcohol at Atmospheric Pressure over Ru‐B Amorphous Catalyst

Efficient Hydrogenation of Xylose and Hemicellulosic Hydrolysate to Xylitol over Ni-Re Bimetallic Nanoparticle Catalyst

Treatments of Lignocellulosic Hydrolysates and Continuous‐Flow Hydrogenation of Xylose to Xylitol

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