Vapor phase hydrogenolysis of glycerol to 1,2-propanediol over γ-Al 2 O 3 supported copper or nickel monometallic and copper–nickel bimetallic catalysts

Pandhare, Nitin Naresh; Pudi, Satyanarayana Murty; Biswas, Prakash; Sinha, Shishir

doi:10.1016/j.jtice.2015.12.028

Cited by 31 publications

(23 citation statements)

References 27 publications

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“…The catalyst-to-glycerol ratio (on a weight basis) was varied from 0.011 to 0.033. As observed, increasing the catalyst-to-glycerol ratio from 0.011 to 0.033 increased the glycerol conversion and the 1,2-PDO yield from 29.4% to 69.8% and 24.5% to 59.3%, respectively, because the number of active sites increased with the increasing catalyst-to-glycerol ratio 33 , 36 . It was also observed that the selectivity of 1,2-PDO did not change much in this range for the catalyst-to-glycerol ratio; the selectivity of 1,2-PDO was approximately 83–86%, implying that over hydrogenolysis of 1,2-PDO did not occur.…”

Section: Resultssupporting

confidence: 53%

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Mondach

Chanklang

Somchuea

et al. 2021

Sci Rep

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Glycerol is a low-cost byproduct of the biodiesel manufacturing process, which can be used to synthesize various value-added chemicals. Among them, 1,2-propanediol (1,2-PDO) is of great interest because it can be used as an intermediate and additive in many applications. This work investigated the hydrogenolysis of glycerol to 1,2-PDO over Co–Cu bimetallic catalysts supported on TiO2 (denoted as CoCu/TiO2) in aqueous media. The catalysts were prepared using the co-impregnation method and their physicochemical properties were characterized using several techniques. The addition of appropriate Cu increased the glycerol conversion and the 1,2-PDO yield. The highest 1,2-PDO yield was achieved over a 15Co0.5Cu/TiO2 catalyst at 69.5% (glycerol conversion of 95.2% and 1,2-PDO selectivity of 73.0%). In the study on the effects of operating conditions, increasing the reaction temperature, initial pressure, and reaction time increased the glycerol conversion but decreased the selectivity to 1,2-PDO due to the degradation of formed 1,2-PDO to lower alcohols (1-propanol and 2-propanol). The reaction conditions to obtain the maximum 1,2-PDO yield were a catalyst-to-glycerol ratio of 0.028, a reaction temperature of 250 °C, an initial H2 pressure of 4 MPa, and a reaction time of 4 h.

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Section: Resultssupporting

confidence: 53%

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Mondach

Chanklang

Somchuea

et al. 2021

Sci Rep

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“…Vapor-phase hydrogenolyis of glycerol was carried out in a continuous fixed bed down flow vertical tubular reactor (Chemito Technologies, India) consisting of a stainless steel tube 540 mm in length and 12.5 mm i.d. The schematic diagram of the flow reactor unit is shown in our previous work . The catalyst was placed on a quartz wool bed inside the reactor.…”

Section: Methodsmentioning

confidence: 99%

“…It is also reported that dispersion of Cu metal and the acidity of the catalyst played an important role on 1,2-PDO selectivity. Recently, we also have developed an active and selective Cu–Ni/γ-Al 2 O 3 catalyst, which showed very high yield (88%) of 1,2-PDO at 98.5% glycerol conversion at very low H 2 /glycerol mole ratio of 54.6 and at 220 °C and 0.75 MPa pressure …”

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenolysis of Glycerol to 1,2-Propanediol over Highly Active and Stable Cu/MgO Catalyst in the Vapor Phase

Pandhare

Pudi

Biswas

et al. 2016

Org. Process Res. Dev.

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Highly active, selective, and stable Cu/MgO catalyst was developed for hydrogenolysis of glycerol to 1,2propanediol (1,2-PDO) in vapor phase. The effect of metal loading, temperature, pressure and weight hourly space velocity (WHSV) on glycerol conversion and 1,2-PDO yield was investigated in a down flow fixed bed tubular reactor. Catalytic results demonstrated that Cu/MgO catalyst promoted the selective hydrogenolysis of C−O bond and limited the cleavage of C−C bond which significantly reduced the selectivity of undesirable products. Very high yield (95.5%) of 1,2-PDO was obtained with 100% conversion of glycerol over 10 wt % Cu/MgO catalyst at very low WHSV of 1.2 h −1 , 220 °C, and 0.75 MPa pressure. The superior performance of 10 wt % Cu/MgO catalyst was attributed to the presence of bifunctional acidic-basic sites, small particle size, and synergetic interaction between copper nanoparticles and MgO support. Time-on-stream study and the characterization results of fresh and used catalyst confirmed the stability of the catalyst after prolonged contact under hydrogen environment, and the carbon deposition rate was almost negligible (∼0.6 mmol carbon g cat −1 h −1 ).

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“…This is because more acidic active copper metal sites are available in the catalyst as the copper metal loading increases. 154 It is worth noting that the glycerol conversion (∼100%) and 1,2-PDO yield (95.5%) were unaffected up to 42 h under the same reaction conditions, indicating the high stability and activity of the 10 wt% Cu/MgO catalyst.…”

Section: Recent Advances In the Catalytic Hydrogenolysis Of Glycerol Into Value-added Chemical Productsmentioning

confidence: 82%

Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C₃ chemicals: current and future trends

Minh

Samudrala

Bhattacharya

2022

Sustainable Energy Fuels

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Vapor phase hydrogenolysis of glycerol to 1,2-propanediol over γ-Al 2 O 3 supported copper or nickel monometallic and copper–nickel bimetallic catalysts

Cited by 31 publications

References 27 publications

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Selective Hydrogenolysis of Glycerol to 1,2-Propanediol over Highly Active and Stable Cu/MgO Catalyst in the Vapor Phase

Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C₃ chemicals: current and future trends

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Vapor phase hydrogenolysis of glycerol to 1,2-propanediol over γ-Al 2 O 3 supported copper or nickel monometallic and copper–nickel bimetallic catalysts

Cited by 31 publications

References 27 publications

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Highly efficient TiO2-supported Co–Cu catalysts for conversion of glycerol to 1,2-propanediol

Selective Hydrogenolysis of Glycerol to 1,2-Propanediol over Highly Active and Stable Cu/MgO Catalyst in the Vapor Phase

Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C3 chemicals: current and future trends

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Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C₃ chemicals: current and future trends