Synthesis of 1,6-hexanediol from HMF over double-layered catalysts of Pd/SiO2 + Ir–ReOx/SiO2 in a fixed-bed reactor

Xiao, Bin; Zheng, Mingyuan; Li, Xinsheng; Pang, Jifeng; Sun, Ruiyan; Wang, Hua; Pang, Xiaoli; Wang, Aiqin; Wang, Xiaodong; Zhang, Tao

doi:10.1039/c5gc02228b

Cited by 137 publications

(104 citation statements)

References 52 publications

(73 reference statements)

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“…According to previous reports, the L acid sites were significantly generated by the MoO x species in ruthenium–molybdenum catalysts . Zhang's groups studied the B acid sites and provided evidence that they are produced by hydroxyl groups on the metal oxide . Thus, the disappearance could be due to the decomposition of hydroxyl groups at high temperatures.…”

Section: Resultsmentioning

confidence: 99%

Influence of Impregnation Processes on Ruthenium–Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass‐Derived Sorbitol into Renewable Alkanes

et al. 2018

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Sorbitol, as a C6 sugar related compound derived from cellulose, is regarded as a promising biomass‐derived substrate and has characteristically higher oxygen content than in fossil‐based resources. In this work, ruthenium–molybdenum carbon catalysts prepared by different impregnation processes were employed and extensively studied in a trickle‐bed reactor for sorbitol hydrodeoxygenation (HDO). Interestingly, these catalysts afforded remarkably different HDO performance. Ruthenium–molybdenum catalysts prepared by ultrasonic treatment and calcination obtained high HDO performance in sorbitol conversion with 79.8 % carbon yield of C5/C6 alkanes (pentane and hexane), almost twice that of ruthenium–molybdenum catalysts prepared without using a calcination processes. Therefore, a series of characterization studies (N2‐adsorption, XRD, HRTEM, XPS, H2‐TPR, CO‐TPD, NH3‐TPD, Py‐IR spectra, etc.) were performed over relevant catalysts to study the catalytic mechanism. The results suggest that prior calcination offers a better chance for the proximity between Ru and Mo precursors to produce the bimetallic catalytic structure Ru–MoOx, which produces high HDO performance.

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Section: Resultsmentioning

confidence: 99%

Influence of Impregnation Processes on Ruthenium–Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass‐Derived Sorbitol into Renewable Alkanes

et al. 2018

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“…The addition of different noble metal Ru, Pt or Rh to Ir‐ReO x /SiO 2 could not promoted the catalytic activity and exhibited similar performance as observed for Ir‐ReO x /SiO 2 , while Pd drastically enhanced the catalytic affinity and resulted in 20.4 % yield of 1,5‐PeD with suppressed polymerization at 393 K and 6 MPa H 2 under aqueous reaction conditions. Furthermore, two‐step temperature facilitated the higher yield of the desired product where at lower temperature (323 K for 2 h) transformation of furfural to THFAL occurs (and hence inhibited the polymerization of furfural), followed by the hydrogenolysis of THFAL into 1,5‐PeD with enhanced yield up to 62.4 % at 393 K in 24 h. Analogously, an efficient catalytic transformation of HMF to 1,6‐HDO with 57.8 % yield was also reported over double‐layered catalysts of Pd/SiO 2 +Ir‐ReO x /SiO 2 in a fixed‐bed reactor at 373 K using 7.0 MPa H 2 in a mixture of water and THF (2:3 v/v) . Study inferred that the upper layer of catalyst, Pd/SiO 2 , promoted the hydrogenation of HMF, while the bottom layer of Re‐based catalyst, catalysed the hydrogenolysis of BHMTF to 1,6‐HDO.…”

Section: Catalytic Furan Ring Opening Reaction Of Biomass‐derived Furmentioning

confidence: 99%

Metal Catalysts for the Efficient Transformation of Biomass‐derived HMF and Furfural to Value Added Chemicals

2018

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Catalytic transformation of biomass‐derived compounds to different platform chemicals and liquid fuel is a prominent way to reduce the global dependence on fossil resources. In past few decades, biomass‐derived furans such as 2‐furfuraldehyde (furfural) and 5‐hydroxymethyl‐2‐furfural (HMF) have received outstanding attention because of their wide applications in the production of various industrially important value‐added chemicals and fuel components. Various catalytic systems and methodologies have been extensively explored for the transformation of these furans to a wide range of products including open ring diketones, ketoacids, alcohols and long chain alkanes. This Review is aimed to provide an extensive overview of the recent developments of several high‐performing heterogeneous catalysts for the catalytic upgradation of the key biomass‐derived furans (furfural and HMF) to value‐added chemicals. Moreover, the role of these catalysts in the catalytic transformations including hydrogenation, decarbonylation, oxidation, hydrogenolysis and ring opening reactions, and the mechanistic pathways are also highlighted in this Review.

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“…Therein, the tailored Brønsted acidity of the support was proposed to facilitate C – O bond cleavage of the furan ring. The group of Zhang demonstrated above 57 % yield in a fixed‐bed reactor with a H 2 O/THF solvent mixture using two catalyst layers, namely Pd/SiO 2 and Ir‐ReO x /SiO 2 .…”

Section: Biomass As Renewable Resourcementioning

confidence: 99%

Sustainable Carbon Sources and Renewable Energy: Challenges and Opportunities at the Interface of Catalysis and Reaction Engineering

Palkovits

2018

Chemie Ingenieur Technik

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Limited fossil resources and the need to reduce greenhouse gas emissions require the development of environmentally benign production processes. Economic, energy and carbon‐efficient value chains based on lignocellulosic biomass are essential for a sustainable and potentially CO2‐neutral chemical industry. Biomass presents a concentrated renewable carbon source for base and fine chemicals, polymers and liquid fuels of high energy density. Research studies have highlighted the need for novel process concepts to account for the high degree of functionality of lignocellulosic biomass. Major challenges include selective deoxygenation of the highly functionalized starting materials, energy‐intensive separation and processes bridging chemo‐catalysis, biotechnology and electro‐catalysis. In the following, these challenges are exemplarily discussed. The showcases are selected to illustrate concepts and not meant to provide a comprehensive overview of the field.

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Synthesis of 1,6-hexanediol from HMF over double-layered catalysts of Pd/SiO₂ + Ir–ReO_x/SiO₂ in a fixed-bed reactor

Abstract: 1,6-Hexanediol (1,6-HDO) was effectively prepared from 5-hydroxymethylfurfural (HMF) over double-layered catalysts of Pd/SiO2 + Ir–ReOx/SiO2 in a fixed-bed reactor.

Cited by 137 publications

References 52 publications

Influence of Impregnation Processes on Ruthenium–Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass‐Derived Sorbitol into Renewable Alkanes

Influence of Impregnation Processes on Ruthenium–Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass‐Derived Sorbitol into Renewable Alkanes

Metal Catalysts for the Efficient Transformation of Biomass‐derived HMF and Furfural to Value Added Chemicals

Sustainable Carbon Sources and Renewable Energy: Challenges and Opportunities at the Interface of Catalysis and Reaction Engineering

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