The hydrolytic hydrogenation of cellulose to sorbitol over M (Ru, Ir, Pd, Rh)-BEA-zeolite catalysts

Negoi, Alina; Triantafyllidis, Konstantinos S.; Pârvulescu, Vasile I.; Coman, Simona M.

doi:10.1016/j.cattod.2013.07.007

Cited by 85 publications

(61 citation statements)

References 37 publications

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“…Nonetheless, it would be advantageous to employ a more selective active phase to avoid the loss of metallic surface area by the addition of poisoning elements. In this sense, iridium has been studied and it has been shown to offer better selectivities compared to other noble metals [5,6].…”

Section: Introductionmentioning

confidence: 99%

Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes

et al. 2015

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In the present work we have studied the effect of carbon supports with different graphitic character (carbon nanotubes, mesoporous graphite and activated carbon) on the catalytic performance of iridium nanoparticles on the liquid phase chemoselective hydrogenation of para-chloronitrobenzene at room temperature. The effect of the oxygen groups was also evaluated by oxidizing a portion of the carbon nanotubes. The Raman and XRD spectra showed that the mesoporous graphite displayed the strongest graphitic character. The characterization of the catalysts by HR-TEM, XPS and TPR-H2, showed that the catalysts had similar particle size and that the catalysts prepared over the previously oxidized support, Ir/CNTox, was not fully reduced. The activity and selectivity achieved with the catalyst Ir/CNT was the best among the samples and the presence of irdium oxide on Ir/CNTox diminished the yield to p-chloroaniline, being the worse catalyst. The reactivity of different isomers was also studied over Ir/CNT and it followed the order m > o > p. This is a previous version of the article published in Catalysis Today. 2015Today. , 249: 72-78. doi:10.1016Today. /j.cattod.2014 Highlights -Ir catalysts supported on carbon materials with different graphitic character.-The effect of oxygen groups in carbon nanotubes has been evaluated.-Ir/CNT shows the best catalytic performance in p-chloronitrobenzene hydrogenation.-The reactivity of different isomers on Ir/CNT was m > o > p. AbstractIn the present work we have studied the effect of carbon supports with different graphitic character (carbon nanotubes, mesoporous graphite and activated carbon) on the catalytic performance of iridium nanoparticles on the liquid phase chemoselective hydrogenation of para-chloronitrobenzene at room temperature. The effect of the oxygen groups was also evaluated by oxidizing a portion of the carbon nanotubes. TheRaman and XRD spectra showed that the mesoporous graphite displayed the strongest graphitic character. The characterization of the catalysts by HR-TEM, XPS and TPR-H 2 , showed that the catalysts had similar particle size and that the catalysts prepared over the previously oxidized support, Ir/CNTox, was not fully reduced. The activity and selectivity achieved with the catalyst Ir/CNT was the best among the samples and the presence of irdium oxide on Ir/CNTox diminished the yield to p-chloroaniline, *Manuscript Click here to view linked References being the worse catalyst. The reactivity of different isomers was also studied over Ir/CNT and it followed the order m > o > p.

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Section: Introductionmentioning

confidence: 99%

Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes

et al. 2015

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“…Sorbitol ([2S,3R,4R,5R]-hexane-1,2,3,4,5, 6-hexol) is one of the most important intermediates, being widely used as sweetener, dispersing agent and humectant in pharmaceuticals, cosmetics, and textiles, as well as platform chemical for the synthesis of chemical compounds such as isosorbide, sorbitan, glycerol, L-sorbose, vitamin C, etc. [3,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…However, although some studies have succeeded in converting cellulose into sorbitol or other high-valued chemicals, the selective production of sorbitol with high yields as well as the valorisation of cellulose are still challenging [7,9], mostly due to the cellulose's robust crystalline structure and insolubility in conventional solvents. Most processes suffer from high energy consumption and low chemical selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Although exciting progress has been made by several groups [7,11,[16][17][18], intensive studies are still required for exploring high-performance catalysts. The aim of this work is to develop an efficient process for the one-pot catalytic conversion of cellulose to sorbitol, using different carbon supported metal catalysts under H 2 pressure.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of different catalysts for the direct conversion of cellulose to sorbitol

Ribeiro¹,

Órfão²,

Pereira³

2015

Green Processing and Synthesis

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Abstract:The catalytic conversion of lignocellulosic biomass to obtain high added value compounds and fuels is a rapidly developing field. Given the abundance of this renewable raw material and its reduced impact on the food chain, it is an attractive source for obtaining chemicals or fuels in the context of a sustainable economy. In this work, bi-functional catalysts were developed that were capable of performing in a single step the hydrolysis and hydrogenation of cellulose to produce compounds that may be used in the production of fine chemicals or easily converted into fuels (e.g., sorbitol). Different activated carbon (AC) supported metal catalysts were examined for the one-pot hydrolytic hydrogenation of cellulose. Among the prepared catalysts, 0.4% Ru/AC was shown to be the most active and selective for the conversion of cellulose into sorbitol. When microcrystalline cellulose was used, a conversion of 32% was reached after 5 h of reaction, with a selectivity to sorbitol of 30%. More over, ball-milled cellulose allowed attaining conversions over 50%, with selectivities to sorbitol of 45%. The results obtained showed that Ru/AC is effective for the hydrolytic hydrogenation of cellulose to sugar alcohols and that the conversion can be greatly improved by using the substrate after pre-treatment by ball-milling.

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“…Cassava dregs, a waste byproduct with a large lignocellulosic component, are generated during the cassava-based bioethanol production (He et al 2014;Kristensen et al 2014;Nguyen et al 2014). DSorbitol is an important chemical intermediate and a new energy chemical that has significant applications in food, medicine, textiles, and cosmetics, as well as in the chemical industry (Deng et al 2010;Zheng et al 2010;Liu et al 2011;Chen et al 2013;Negoi et al 2014;Ribeiro et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Efficient Conversion of D-Glucose into D-Sorbitol over Carbonized Cassava Dregs-Supported Ruthenium Nanoparticles Catalyst

Li¹,

Liu²,

Shu-bin³

2018

BioResources

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A carbonized cassava dregs-supported ruthenium nanoparticles catalyst (Ru/CCD) was prepared by a simple impregnation-chemical reduction method. The synthesized Ru/CCD catalysts were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The catalytic performances of the Ru/CCD catalysts were evaluated in the conversion of D-glucose into D-sorbitol under hydrogen atmosphere. Moreover, the effects of various parameters on glucose hydrogenation and the recyclability of the catalysts were investigated in detail. The optimized D-sorbitol yield reached up to 98.6% at 120 °C for 1.5 h with D-glucose conversion of 99.7%. The Ru nanoparticles played an important role in the hydrogenation of D-glucose into D-sorbitol, and the Ru particle was widely dispersed all over the support surface. In addition, the Ru/CCD catalyst was stable during the reaction and was reused for up to five successive runs with a slight decrease in D-sorbitol yield. Technology, Guangzhou, Guangdong, 510640, China; * Corresponding authors: amyliu@scut.edu.cn, shubinwu@scut.edu.cn Keywords: Cassava dregs; Ruthenium; D-Glucose; D-Sorbitol Contact information: State Key Laboratory of Pulp and Paper Engineering, South China University of INTRODUCTIONWith the gradual depletion of fossil feedstock and the deteriorating pollution situation, new renewable alternatives to fossil feedstock are being explored (Zhang et al. 2012;Xi et al. 2013;Dabbawala et al. 2016). Biomass, a sustainable resource for the energy and carbon cycles in nature, has aroused worldwide attention (Kobayashi et al. 2011;Han and Lee 2012;Liao et al. 2014;Zhu et al. 2014). Cassava dregs, a waste byproduct with a large lignocellulosic component, are generated during the cassava-based bioethanol production (He et al. 2014;Kristensen et al. 2014;Nguyen et al. 2014). DSorbitol is an important chemical intermediate and a new energy chemical that has significant applications in food, medicine, textiles, and cosmetics, as well as in the chemical industry (Deng et al. 2010;Zheng et al. 2010;Liu et al. 2011;Chen et al. 2013;Negoi et al. 2014;Ribeiro et al. 2017).Recently, D-sorbitol has been produced by catalytic hydrogenation of D-glucose in industrial production. A Raney-type Ni catalyst has been developed for the production of D-sorbitol. However, the Ni in the Raney-type Ni catalyst easily leaches into the solution . In addition, the easy deactivation of the catalyst is an important issue with Raney-type Ni catalysts (Dabbawala et al. 2016). To overcome the drawbacks of the Raney-type Ni catalysts, several catalysts have been applied in the hydrogenation of Dglucose, especially Ru-based catalysts (Mishra et al. 2014;Lazaridis et al. 2015). The Rubased catalysts have higher activity than Raney-type Ni catalysts. Furthermore, the Ru-PEER-REVIEWED ARTICLE bioresources.com Li et al. (2018). "Cassava dregs support for catalyst," BioResources 13(1), 1278-1288. 1279 based catalysts...

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The hydrolytic hydrogenation of cellulose to sorbitol over M (Ru, Ir, Pd, Rh)-BEA-zeolite catalysts

Cited by 85 publications

References 37 publications

Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes

Ir supported over carbon materials for the selective hydrogenation of chloronitrobenzenes

Comparative study of different catalysts for the direct conversion of cellulose to sorbitol

Efficient Conversion of D-Glucose into D-Sorbitol over Carbonized Cassava Dregs-Supported Ruthenium Nanoparticles Catalyst

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