Glycerol hydrogenolysis to n -propanol over Zr-Al composite oxide-supported Pt catalysts

Li, Chuang; He, Bo; Ling, Yu; Tsang, Chi‐Wing; Liang, Changhai

doi:10.1016/s1872-2067(18)63068-2

Cited by 20 publications

(12 citation statements)

References 30 publications

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“…At 260 • C and after 5 h of reaction (Test 10), a yield to 1-POH of 71% can be obtained, comparable with other catalytic systems reported in the literature such as Pt/Zr 0.7 Al 0.3 O y [13], and this is a yield superior to that obtained with Ni/SiO 2 and Ni/Al 2 O 3 [20], Pd/MoO 3 -Al 2 O 3 [28], Pt/HSiW-Al 2 O 3 [21], and Pt/PTA-ZrO 2 [11].…”

Section: Catalytic Activitysupporting

confidence: 82%

“…Glycerol is a by-product of biodiesel synthesis and is currently considered an important biomass resource because it can be used as a raw material to synthesize other chemical compounds that, in the past, were obtained by petrochemical methods [1][2][3][4]. Particularly, glycerol hydrogenolysis leads to the formation of glycols such as 1,2-propylene glycol (1,2-PG) [5][6][7] and 1,3-propylene glycol (1, [8][9][10], and propanols 1-propanol (1-POH) and 2-propanol (2-POH) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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High Yield to 1-Propanol from Crude Glycerol Using Two Reaction Steps with Ni Catalysts

et al. 2020

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The objective of the present work is to achieve high yield to 1-propanol (1-POH) by crude glycerol hydrogenolysis in liquid phase and find an alternative to the use of noble metals by employing Ni catalysts. Two Ni catalysts with different supports, alumina (γ-Al2O3), and a phosphorous-impregnated carbon composite (CS-P) were studied and characterized in order to determine their acid properties and metallic phases. With the Ni/γ-Al2O3 catalyst, which presented small particles of metallic Ni interacting with the acid sites of the support, it was possible to obtain a complete conversion of crude glycerol with high selectivity towards 1,2-propylene glycol (1,2 PG) (87%) at 220 °C whereas with the Ni/CS-P catalyst, the presence of AlPOx species and the Ni2P metallic phase supplied acidity to the catalyst, which promoted the C-O bond cleavage reaction of the secondary carbon of 1,2 PG to obtain 1-POH with very high selectivity (71%) at 260 °C. It was found that the employment of two consecutive reaction stages (first with Ni/ γ-Al2O3 at 220 °C and then with Ni/CS-P at 260 °C) allows reaching levels of selectivity and a yield to 1-POH (79%) comparable to noble metal-based catalysts.

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Section: Catalytic Activitysupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

High Yield to 1-Propanol from Crude Glycerol Using Two Reaction Steps with Ni Catalysts

et al. 2020

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“…Noble metal-based catalysts have proven to be highly effective for glycerol hydrogenolysis [17]. Very few catalytic systems based on Ni [18], Ir [19], Rh [20,21], Pt [22,23], and Ru [24,25] based catalysts have so far been reported for the direct synthesis of biopropanols from glycerol, both in batch and fixed bed reactors. Previous research by Zhu et al [26] on liquid phase glycerol hydrogenolysis to 1-propanol and 2-propanol over Pt-H 4 SiW 12 O 40 /ZrO 2 bifunctional catalysts at 200 • C and 5 MPa H 2 pressure revealed that appropriate metal-acid balance is important to promote the double dehydration-hydrogenation ability of glycerol.…”

Section: Introductionmentioning

confidence: 99%

Toward the Sustainable Synthesis of Propanols from Renewable Glycerol over MoO3-Al2O3 Supported Palladium Catalysts

Samudrala

Bhattacharya

2018

Catalysts

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The catalytic conversion of glycerol to value-added propanols is a promising synthetic route that holds the potential to overcome the glycerol oversupply from the biodiesel industry. In this study, selective hydrogenolysis of 10 wt% aqueous bio-glycerol to 1-propanol and 2-propanol was performed in the vapor phase, fixed-bed reactor by using environmentally friendly bifunctional Pd/MoO3-Al2O3 catalysts prepared by wetness impregnation method. The physicochemical properties of these catalysts were derived from various techniques such as X-ray diffraction, NH3-temperature programmed desorption, scanning electron microscopy, 27Al NMR spectroscopy, surface area analysis, and thermogravimetric analysis. The catalytic activity results depicted that a high catalytic activity (>80%) with very high selectivity (>90%) to 1-propanol and 2-propanol was obtained over all the catalysts evaluated in a continuously fed, fixed-bed reactor. However, among all others, 2 wt% Pd/MoO3-Al2O3 catalyst was the most active and selective to propanols. The synergic interaction between the palladium and MoO3 on Al2O3 support and high strength weak to moderate acid sites of the catalyst were solely responsible for the high catalytic activity. The maximum glycerol conversion of 88.4% with 91.3% selectivity to propanols was achieved at an optimum reaction condition of 210 ∘ C and 1 bar pressure after 3 h of glycerol hydrogenolysis reaction.

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“…Glycerol (GLY), a bio-based polyol and the major side product of biodiesel production, can be converted to several value added chemicals such as propylene glycol (PG), [1] 1,3propanediol, [2][3][4][5][6][7] n-propanol [8] and propyl acetate. [9] In particular PG finds wide application in cosmetics, as monomer, anti-freeze and food additive.…”

Section: Introductionmentioning

confidence: 99%

On the effect of Alkaline Earth Metal Cations in the Hydrogenolysis of Glycerol over Pt/C – an Experimental and Theoretical Study

et al. 2022

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Glycerol can be converted to propylene glycol via metal and base catalyzed hydrogenolysis. The nature of the base has a profound influence on the outcome of the reaction. We have tested a range of alkaline (LiOH, NaOH and CsOH) and alkaline earth (Mg(OH) 2 , Ca(OH) 2 , Sr(OH) 2 and Ba(OH) 2 ) metal hydroxides in combination with Pt/C. The data reveal that alkaline earth metal hydroxides exhibit a much higher activity and improved selectivity. DFT calculations confirm that the coordination of reactive intermediates to divalent cations is responsible for the observed behavior. In the study, the effect of the cation on hydrogenolysis was elucidated for the first time.

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Glycerol hydrogenolysis to n -propanol over Zr-Al composite oxide-supported Pt catalysts

Cited by 20 publications

References 30 publications

High Yield to 1-Propanol from Crude Glycerol Using Two Reaction Steps with Ni Catalysts

High Yield to 1-Propanol from Crude Glycerol Using Two Reaction Steps with Ni Catalysts

Toward the Sustainable Synthesis of Propanols from Renewable Glycerol over MoO3-Al2O3 Supported Palladium Catalysts

On the effect of Alkaline Earth Metal Cations in the Hydrogenolysis of Glycerol over Pt/C – an Experimental and Theoretical Study

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