Hydrogenation in supercritical conditions catalyzed by palladium supported on modified activated carbon

Liu, Lujie; Guo, Hongmei; Xue, Bo; Liu, Hui; Chen, Min

doi:10.1039/c5ra14284a

Cited by 22 publications

(16 citation statements)

References 32 publications

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“…A recent study used density functional theory to show that furan (decarbonylation product) forms under low hydrogen coverage but furfuryl alcohol (hydrogenation product) forms at high hydrogen coverage . Experimental studies supported these computational results by demonstrating that the selectivity for furan shifted to furfuryl alcohol at increased H 2 pressure . Hydrogen coverage also affects relative selectivity toward hydrodeoxygenation over hydrogenation.…”

Section: Introductionmentioning

confidence: 94%

“…[43] Experimental studies supported these computational results by demonstrating that the selectivity for furan shifted to furfuryl alcohol at increased H 2 pressure. [41,53,54] Hydrogen coverage also affects relative selectivity toward hydrodeoxygenation over hydrogenation. Under H 2rich conditions, Cu/SiO 2 yields higher selectivity for furfuryl alcohol at lower temperatures and for 2-methylfuran at higher temperatures due to the proposed Eley-Rideal mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Selective Hydrogenation of Furfural in a Proton Exchange Membrane Reactor Using Hybrid Pd/Pd Black on Alumina

et al. 2019

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Conventional thermocatalytic hydrogenation employs high temperatures and pressures and often exhibits low selectivity toward desired products. Electrochemical hydrogenation can reduce energy input by operating at ambient conditions and improving process control and selectivity; however, electrocatalysts face stability and conductivity limitations. To overcome these obstacles, we physically mixed a traditional electrocatalyst (Pd black) with a hydrogenation‐active metal (Pd) supported on a conventional metal oxide support (alumina, Al2O3) and investigated electrochemical hydrogenation of furfural, a model biomass compound. Experiments were conducted in a proton exchange membrane (PEM) reactor, in which synthesized electrocatalysts were used as cathodes. Catalysts with Pd black and varying loadings of Pd on Al2O3 were used to determine the impact of hydrogen spillover on electrocatalytic hydrogenation mechanisms, selectivity, and rates. Observed hydrogenation rates and selectivities were linked to structural and compositional properties of the catalyst mixtures. Of the Pd black cathodes tested, 5 wt % Pd/Al2O3 exhibited production rates as high as pure Pd black and higher selectivity towards completely hydrogenated products. Improved selectivity and rates were attributed to a synergistic interaction between Pd black and 5 wt % Pd/Al2O3 in which Pd/Al2O3 increased the number of active sites, while Pd black provided stable conductivity.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenation of Furfural in a Proton Exchange Membrane Reactor Using Hybrid Pd/Pd Black on Alumina

et al. 2019

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“…Furfural (99%), Ni(NO 3 ) 2 $6H 2 O (98%), and Cu(NO 3 ) 2 $3H 2 O (99%) were purchased from Aladdin Chemistry Co. Ltd. CNTs was purchased from Beijing DK nano technology Co. Ltd (purity >95%). Our previous studies have proved that oxygenated functional groups on the surface of support mainly play a key role for the metal dispersed [31]. Raw CNTs (97.6 m 2 /g) was pretreated with 140 mL of concentrated HNO 3 at 120 C for 4 h with continuous magnetic stirring.…”

Section: Chemicalsmentioning

confidence: 99%

“…Finally, the reactor was cooled down, and the liquid products were analyzed by GCeMS and GC (equipped with HP-5 capillary column and flame ionization detector (FID)). The quantitative analysis was by the formerly described procedure using known standards and an internal normalization method [31]. Performance of catalysts was evaluated in terms of (%) conversion of furfural and (%) selectivity to THFA calculated on the amount of converted furfural.…”

Section: Experimental Set Up and Reaction Proceduresmentioning

confidence: 99%

Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol over Ni/CNTs and bimetallic Cu Ni/CNTs catalysts

Liu

Chen

2016

International Journal of Hydrogen Energy

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151

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“…However, the environmental regulations have directed the catalyst development from chromium to more harmless metals, such as Ni and noble metals . The majority of the studied noble metal and Ni catalysts have been commercial or prepared on commercial activated carbon supports: Ru/C, Pt/C, Pd/C, and Ni/C . However, little is known about the effect of the structure of activated carbon (AC) on furfural hydrotreatment.…”

Section: Introductionmentioning

confidence: 99%

Study of Ni, Pt, and Ru Catalysts on Wood‐based Activated Carbon Supports and their Activity in Furfural Conversion to 2‐Methylfuran

et al. 2018

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Bio‐based chemicals can be produced from furfural through hydrotreatment. In this study, 2‐methylfuran (MF), a potential biofuel component, was produced with Pt, Ru, and Ni catalysts supported on wood‐based activated carbons. The catalytic hydrotreatment experiments were conducted in a batch reactor at 210–240 °C with 2‐propanol as solvent and 40 bar H2 pressure. Two types of activated carbon supports were prepared by carbonization and activation of lignocellulosic biomass (forest‐residue‐based birch and spruce from Finland). Both types of activated carbons were suitable as catalyst supports, giving up to 100 % furfural conversions. The most important factors affecting the MF yield were the metal dispersion and particle size as well as reaction temperature. The highest observed MF yields were achieved with the noble metal catalysts with the highest dispersions at 240 °C after 120 min reaction time: 3 wt % Pt on spruce (MF yield of 50 %) and 3 wt % Ru on birch (MF yield of 49 %). Nickel catalysts were less active most likely owing to lower dispersions and incomplete metal reduction. Interesting results were obtained also with varying the metal loadings: the lower Pt loading (1.5 wt %) achieved almost the same MF yield as the 3 wt % catalysts, which can enable the production of MF with high yields and reduced catalyst costs. Based on this study, biomass‐based renewable activated carbons can be used as catalyst supports in furfural hydrotreatment with high conversions.

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Hydrogenation in supercritical conditions catalyzed by palladium supported on modified activated carbon

Cited by 22 publications

References 32 publications

Selective Hydrogenation of Furfural in a Proton Exchange Membrane Reactor Using Hybrid Pd/Pd Black on Alumina

Selective Hydrogenation of Furfural in a Proton Exchange Membrane Reactor Using Hybrid Pd/Pd Black on Alumina

Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol over Ni/CNTs and bimetallic Cu Ni/CNTs catalysts

Study of Ni, Pt, and Ru Catalysts on Wood‐based Activated Carbon Supports and their Activity in Furfural Conversion to 2‐Methylfuran

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