Revealing the factors determining the selectivity of guaiacol HDO reaction pathways using ZrP-supported Co and Ni catalysts

Han, Geun-Ho; Lee, Min Woo; Park, Soohyung; Kim, Ho-Joong; Ahn, Jae Pyoung; Seo, Myung Gi

doi:10.1016/j.jcat.2019.07.034

Cited by 43 publications

(12 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be observed that Ni is less active than Co when supported over both nitrogen-doped and undoped GOr in agreement with previous results over other carbon supports 53 and over Al-MCM-41 or zirconium phosphate (ZrP) or zeolites. 29,33,73 However, better hydrogenation activity of Ni compared to Co has also been reported for SBA-15 based catalysts in the gasphase HDO of anisole 74 and over CeO 2 for in situ hydrogenation using alcohols as hydrogen donors. 75 Moreover, the doped samples display better activity than their undoped counterparts.…”

Section: Methodsmentioning

confidence: 98%

Effect of the Support Functionalization of Mono- and Bimetallic Ni/Co Supported on Graphene in Hydrodeoxygenation of Guaiacol

Blanco

Carrales-Alvarado

Dongil

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Mono- and bimetallic Ni/Co catalysts were prepared over reduced graphene oxide undoped and doped with N and evaluated in the hydrodeoxygenation of guaiacol in a batch reactor. Catalysts were characterized by N2 physisorption, CO chemisorption, XRD, TEM, TPR, and XPS. Results showed that catalytic activity was improved in all the cases by doping with N. Such enhancement was ascribed to electron transfer from the support to the metal particles. In the case of bimetallic catalysts, measured activity was improved, which can be ascribed to a synergistic effect between Ni and Co. Such an effect was stronger over the unmodified graphene than the one modified by N. The product distribution was unaffected by the support but differed from the respective monometallic catalysts suggesting the formation of new active sites.

show abstract

Section: Methodsmentioning

confidence: 98%

Effect of the Support Functionalization of Mono- and Bimetallic Ni/Co Supported on Graphene in Hydrodeoxygenation of Guaiacol

Blanco

Carrales-Alvarado

Dongil

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The presence of two broad peaks in the ranges of 10-40°and 40-70°indicated that the amorphous nature remained intact on all ZrP-based catalysts, as compared with that of bare ZrP. [44][45][46] In case of the Ru/ZrP and RuÀ CoO/ZrP catalysts, there were no diffraction peaks corresponding to crystalline Ru 0 phases, implying that the reduced Ru species were highly dispersed. Comparatively, the XRD patterns of the Ru/CoO/ZrP showed three weak diffraction peaks at 38.2, 42.4, and 44.0°(JCPDS 65-1863), , propane, and other unidentified products.…”

Section: Catalyst Characterizationmentioning

confidence: 96%

Direct Transformation of Glycerol to Propanal using Zirconium Phosphate‐Supported Bimetallic Catalysts

et al. 2020

View full text Add to dashboard Cite

Selective transformation of glycerol to propanal (PA) provides a feasible route towards the sustainable synthesis of high valueadded chemicals. In this work, zirconium phosphate (ZrP) was studied as support and Ru and Co as metal sites for glycerol hydrogenolysis in a continuous-flow reactor. It was found that ZrP-supported CoÀ O species had a moderate selectivity to PA (49.5 %) in glycerol hydrogenolysis. Notably, once Ru species were doped into CoO/ZrP, the resulting catalyst exhibited not only an outstanding catalytic performance for glycerol hydrogenolysis to PA (a selectivity of 80.2 % at full conversion), but also a high stability at least a 50 h long-term performance. The spent catalyst could be regenerated by calcining in air to remove carbonaceous deposits. Characterization indicated that the acid sites on ZrP played a very critical role in the dehydration of glycerol into acrolein (AE), that the distribution of Co was uniform, basically consistent with that of Zr, P and Ru, and that an especially close contact between CoÀ O and Ru species was formed on Ru/CoO/ZrP catalyst. The further activity tests and characterizations confirmed that there was a strong interaction between the dispersed CoÀ O species and Ru 0 nanoparticles, which endowed Ru sites with high electronic density. This effect could play a role in facilitating the dissociation of H 2 , and thus in promoting the hydrogenation reaction. Besides, DFT calculations suggested that the CoÀ O species can adsorb more strongly the C=C bond of the intermediate AE on a highly coordinatively unsaturated Co (Co cus) site and thus lead to preferential hydrogenation at the C=C bond of AE to PA.

show abstract

“…It is a component of the typical CoMoS/Al 2 O 3 hydrotreating catalyst and is active for HDO. 29 HDO of guaiacol was performed using both Ni/ZrP and Co/ZrP catalysts by Han et al, 30 and they showed different reactions pathways, affecting selectivity, demonstrating that cobalt favors a less hydrogen-consuming reaction pathway, producing phenol and cyclohexane as main products. In addition, iron has been cited as a good promoter, because of its abundance, low cost, and effective catalytic performance improvement.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole

Ballesteros‐Plata

Barroso-Martín

Cervantes

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The effect of adding iron, cobalt or nickel to a prepared niobium-supported catalyst using mesoporous silica SBA-15 as a support was evaluated in the hydrodeoxygenation (HDO) reaction of anisole, chosen as a model compound in lignocellulosic biomass derived bio-oil. HDO activity as well as selectivity toward O-free products were highly dependent on the catalyst formulation: Ni incorporation showed the highest anisole conversion and selectivity to deoxygenated products, followed by Co and Fe counterparts. The activity was explained in terms of acidity, metal surface exposure and reducibility as a function of the interaction between the phases present. Regarding the characterization results, the better performance of NiNb/SBA-15 was associated with its lower acidity, higher Nb/Si surface exposure, NbO 2 /Nb 2 O 5 ratio and better interaction between Ni and Nb species.

show abstract

Revealing the factors determining the selectivity of guaiacol HDO reaction pathways using ZrP-supported Co and Ni catalysts

Cited by 43 publications

References 96 publications

Effect of the Support Functionalization of Mono- and Bimetallic Ni/Co Supported on Graphene in Hydrodeoxygenation of Guaiacol

Effect of the Support Functionalization of Mono- and Bimetallic Ni/Co Supported on Graphene in Hydrodeoxygenation of Guaiacol

Direct Transformation of Glycerol to Propanal using Zirconium Phosphate‐Supported Bimetallic Catalysts

Bimetallic Niobium-Based Catalysts Supported on SBA-15 for Hydrodeoxygenation of Anisole

Contact Info

Product

Resources

About