Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Mallesham, Baithy; Sudarsanam, Putla; Reddy, B.; Reddy, Benjaram M.

doi:10.1016/j.apcatb.2015.07.037

Cited by 80 publications

(60 citation statements)

References 69 publications

(94 reference statements)

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“…Moreover, the intensities of Cu and ZnO crystallite diffraction peaks appeared much stronger after several experimental cycles of the spent catalyst, indicating the worse dispersion as well as larger crystallite size due to agglomeration of Cu and ZnO during the reaction. The reusability of Ce promoted Cu-Mg catalyst was investigated by Mallesham and co-workers (89). The authors performed 4 cycles using the same catalyst at 200°C, 870 psi H 2 , 50 g of 20 wt% aqueous glycerol, 1 g reduced catalyst for 10 h reaction time.…”

Section: Catalyst Deactivationmentioning

confidence: 99%

Recent advancements in catalytic conversion of glycerol into propylene glycol: A review

et al. 2016

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The renewability of bio-glycerol has made it an attractive platform for the production of diverse compounds. Selective hydrogenolysis of glycerol to propylene glycol (PG) is one of the most promising routes for glycerol valorization, since this compound is an important chemical intermediate in a number of applications. In this article, advancements in the catalytic conversion of glycerol into propylene glycol are reviewed, which include advances in process development, effects of preparation and activation methods on catalytic activity and stability, and the performance of various types of catalysts. The feasibility of using bio-hydrogen and the challenges of utilizing crude glycerol for glycerol hydrogenolysis are also discussed. ARTICLE HISTORY

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Section: Catalyst Deactivationmentioning

confidence: 99%

Recent advancements in catalytic conversion of glycerol into propylene glycol: A review

et al. 2016

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“…The rest of the products formed differ in concentration depending on the catalyst used. Over CC mainly 3-HP and 1,3-PDO (reactions (5) and (6)) are formed. Over CA mainly AOL hydrogenation products appear (EtOH and MeOH) (reaction (8)) and products of dehydration of 1,2-PDO (AO) (reaction (9)).…”

Section: Study Of Reaction Conditionsmentioning

confidence: 99%

“…Among the plentiful chemicals derived from Gly, propylene glycol (1,2‐propanediol, 1,2‐PDO) has attracted much attention from researchers in recent years because of its multiple applications. Uses of 1,2‐PDO are in unsaturated polyester resins, functional fluids (antifreeze, de‐icing and heat transfer), pharmaceuticals, foods and animal feed, cosmetics, liquid detergents, tobacco humectants, flavors and fragrances, personal care products, paints, agricultural adjuvants and chemical commodities …”

Section: Introductionmentioning

confidence: 99%

“…Uses of 1,2-PDO are in unsaturated polyester resins, functional fluids (antifreeze, de-icing and heat transfer), pharmaceuticals, foods and animal feed, cosmetics, liquid detergents, tobacco humectants, flavors and fragrances, personal care products, paints, agricultural adjuvants and chemical commodities. [4][5][6][7][8] The catalytic hydrogenolysis of Gly to 1,2-PDO is now being recognized as a green and sustainable process for production of propanediols, compared with the traditional and industrially established petroleum-based route of hydration of propylene oxide. 9 Until now a lot of effort has been devoted to developing an efficient hydrogenolysis process.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogenolysis of glycerol to 1,2‐propanediol in a continuous flow trickle bed reactor

Manuale

Santiago

Torres

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Hydrogenolysis of glycerol to glycols in continuous flow three phase reactors is of practical importance due to the need to give value to huge amounts of surplus glycerol. Thermodynamic and kinetic aspects must be revised for a proper design. The system was studied in a trickle‐bed reactor using copper chromite and Cu/Al2O3 as catalysts. RESULTS Phase equilibrium and flow pattern were verified. Solid, liquid and gas phases were present, with the liquid phase in ‘trickling’ flow. Catalysts were characterized by inductively coupled plasma (ICP), nitrogen sortometry, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), temperature programmed reduction (TPR) and pyridine thermal programmed desorption (TPD). The average reaction rate was found to be practically constant under different process conditions. A theoretical analysis indicated that the resistance to the transfer of hydrogen from the gas to the liquid phase dominated the overall kinetics. Selectivity to 1,2‐propanediol varied with temperature, with a maximum at 230 °C (97%). Selectivity was a function of the catalyst acidity. When the pressure was increased the selectivity to 1,2‐propanediol was increased, up to 97% at 14 bar. Higher pressures did not modify this value. CONCLUSIONS Optimum reaction conditions for maximum selectivity to 1,2‐propanediol with Cu‐based catalysts are 230 °C and 14 bar. System kinetics are, however, dominated by the gas–liquid mass transfer resistance. © 2017 Society of Chemical Industry

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“…The conversion and selectivity to five‐membered cyclic acetals can be controlled by judicious choice of the suitable solid catalyst. In view of this, several heterogeneous catalysts such as ion‐exchange resin , Zeolite Beta, K‐10 montmorillonite , metal oxides (MoO x /TiO 2 ‐ZrO 2 ) , H‐ZSM‐5 , SO 3 –H‐SBA‐15 , Al‐modified zeolites , Amberlyst‐47 , SnO 2 , Zr‐SBA‐16 , metal phosphates mesoporous MoO 3 /SiO 2 catalyst and supported heteropolyacids and so forth have been reported as a suitable catalysts for glycerol acetalization. Zeolite Beta is a potential catalyst and showed a comparable activity with other heterogeneous catalysts .…”

Section: Introductionmentioning

confidence: 99%

Solvent free acetalization of glycerol with formaldehyde over hierarchical zeolite of BEA topology

Sonar

Shinde

Asok

et al. 2017

Env Prog and Sustain Energy

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The hierarchical H/BEA zeolites were prepared by postsynthesis treatment. The portion of the parent H/BEA zeolite was treated with aqueous 0.1 M NaOH solution with different alkali volume to H/BEA zeolite weight (5, 10, 30,150, and 300 mL/g) ratios. The physicochemical properties of samples were evaluated by powder X‐ray diffraction, Pyridine Fourier transform infrared spectroscopy, NH3 temperature programme desorption, Nitrogen adsorption/desorption isotherms, and magic angle spinning nuclear magnetic resonance spectroscopy. The catalytic performance of various catalysts was investigated in solvent free acetalization of glycerol with formaldehyde. Among all the catalysts, a hierarchical H/BEA prepared by treating H/BEA with 5 mL aqueous 0.1 M NaOH solution per gram of H/BEA exhibited the highest specific surface area and high acidity. This optimal hierarchical H/BEA5 catalyst has shown an excellent catalytic activity with glycerol conversion of 78% and 1,3 dioxalane selectivity of 85% under mild operating parameters than reported. H/BEA5 was found to be highly stable and recyclable. The acetalization of glycerol with formaldehyde follows first order reversible using PseudoHomogeneous model. In present study, the activation energy for this reaction is found to be 46.95 KJmol−1 which is lower than reported. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 797–807, 2018

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Development of cerium promoted copper–magnesium catalysts for biomass valorization: Selective hydrogenolysis of bioglycerol

Cited by 80 publications

References 69 publications

Recent advancements in catalytic conversion of glycerol into propylene glycol: A review

Recent advancements in catalytic conversion of glycerol into propylene glycol: A review

Hydrogenolysis of glycerol to 1,2‐propanediol in a continuous flow trickle bed reactor

Solvent free acetalization of glycerol with formaldehyde over hierarchical zeolite of BEA topology

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