Steam reforming and oxidative steam reforming of methanol and ethanol: The behaviour of LaCo0.7Cu0.3O3

Lignin, a major component of lignocellulose, is the largest source of aromatic building blocks on the planet and harbors great potential to serve as starting material for the production of biobased products. Despite the initial challenges associated with the robust and irregular structure of lignin, the valorization of this intriguing aromatic biopolymer has come a long way: recently, many creative strategies emerged that deliver defined products via catalytic or biocatalytic depolymerization in good yields. The purpose of this review is to provide insight into these novel approaches and the potential application of such emerging new structures for the synthesis of biobased polymers or pharmacologically active molecules. Existing strategies for functionalization or defunctionalization of lignin-based compounds are also summarized. Following the whole value chain from raw lignocellulose through depolymerization to application whenever possible, specific lignin-based compounds emerge that could be in the future considered as potential lignin-derived platform chemicals.

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“…The use of Cu as dopant in steam reforming, oxidative steam reforming, CO oxidation, and NO reduction was also reported. 117 , 118 …”

Section: Catalytic Strategies Aiming At High Yield and Selective Prodmentioning

confidence: 99%

Bright Side of Lignin Depolymerization: Toward New Platform Chemicals

et al. 2018

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“…The occurrence of the latter indicates an important role of thermodynamics in SRM reaction over these catalysts. The peculiar CO 2 selectivity profile comprising of two distinct maxima on LCPZO is not observed on previously reported perovskitetype oxide catalysts [11][12][13] and is tentatively assigned to the dynamic behaviour of the active/selective phase composition in the catalyst as a function of temperature during the SRM reaction [14].…”

Section: Steam Reforming Of Methanol (Srm)mentioning

confidence: 47%

“…It should be mentioned that LCPO shows slightly better CO 2 selectivity between 300 and 375°C with a maximum of 80 % (with 100 % conversion) at 375°C. This is the best selectivity reported so far on any ABO 3±d type perovskite oxide [11][12][13]. The temperature dependent CO 2 selectivity is also evaluated at constant CH 3 OH conversion over the catalysts between 150 and 450°C [24].…”

Section: Steam Reforming Of Methanol (Srm)mentioning

confidence: 71%

“…These two undesired side reactions can be thermodynamically limited by conducting SRM at lower temperatures with suitable catalysts. A few studies report perovskite-type oxides such as La 0.6 Sr 0.4 Co 1-y Fe y O 3-d (y = 0.2, 0.5, 0.8) [11], LaCo 0.7 Cu 0.3 O 3 [12] and La 0.7 Sr 0.3 CuO 3-d [13] for SRM reaction for solid oxide fuel cell (SOFCs) applications. The SRM performance of these catalysts is, in general, very poor; CH 3 OH conversion activity of the catalysts begins only above 250°C and the CO 2 selectivity is between 50 and 70 %.…”

Section: Introductionmentioning

confidence: 99%

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Methanol Steam Reforming on Perovskite-Type Oxides LaCo1−x−yPdxZnyO3±δ: Effect of Pd/Zn on CO2 Selectivity

2015

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The perovskite-type oxides LaCoO 3±d (LCO) with and without substitution of Co by Pd and/or Zn are studied for steam reforming of methanol (SRM). The catalysts LaCo 1-x-y Pd x Zn y O 3±d are synthesized by amorphous citrate method and subjected to calcination at 800°C for 2 h. The catalysts are characterized by inductively coupled plasma optical emission spectroscopy (ICP-OES), N 2-physisorption (BET), X-ray diffraction (XRD) and tested in SRM reaction. The surface area of the catalysts is around 9 (±1) m 2 /g. The XRD patterns of the catalysts reflect only rhombohedral crystal structure, indicating the phase purity of the perovskites. The SRM performance of the catalysts, especially the CO 2 selectivity below 275°C, is strongly dependent on the catalyst composition and reaction temperature. The CO 2 selectivity profile of Pd and Zn containing LaCo 0.85 Pd 0.075 Zn 0.075 O 3±d consists of two distinct maxima, one at 225°C and the other above 375°C. The former is missing on un-substituted LCO or mono metal substituted LaCo 0.87 Pd 0.13 O 3±d and LaCo 0.89-Zn 0.11 O 3±d , which is attributed to CO 2 selective phase related to Pd and Zn. The high temperature CO 2 selectivity maximum of the catalysts is not dependent on the Co substitution by Pd and/or Zn and is ascribed, in general, to the bulk catalyst composition.

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“…Also in this case, the doping with copper greatly improves the activity of LaCoO 3 both in ethanol and even more in methanol steam reforming and oxidative steam reforming. The results are surely due to the presence of copper, as demonstrated by the activity and selectivity of a LaSrCuO 3 in methanol and ethanol steam reforming and oxidative steam reforming ( Table 7) [19,20].…”

Section: Copper Activation: Inside the Perovskite Cell Or Deposited Omentioning

confidence: 99%

Developing Functionality in Perovskites from Abatement of Pollutants to Sustainable Energy Conversion and Storage

Bedon¹,

Glisenti²

2020

Perovskite Materials, Devices and Integration

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Different functionalities can be developed and optimised in perovskites by means of different approaches: doping, nanocomposition and exsolution. In our research, these strategies are used with the aim of a sustainable development. Our objectives are in developing perovskite-based materials for catalysis and electrocatalysis. In particular, we successfully obtained catalysts for abatement of pollutants in three-way catalysts, catalysts for dry reforming of methane and electrocatalysts for solid oxide cells (solid oxide fuel cells and solid oxide electrolysers). In all cases, the corresponding device and experimental setup was optimised. The catalysts and electro-catalysts we considered are free of noble metals and with minimum amount of critical raw materials. The preparation procedures are by wet chemistry, highly reproducible and up-scalable.

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Steam reforming and oxidative steam reforming of methanol and ethanol: The behaviour of LaCo0.7Cu0.3O3

Cited by 58 publications

References 82 publications

Bright Side of Lignin Depolymerization: Toward New Platform Chemicals

Bright Side of Lignin Depolymerization: Toward New Platform Chemicals

Methanol Steam Reforming on Perovskite-Type Oxides LaCo1−x−yPdxZnyO3±δ: Effect of Pd/Zn on CO2 Selectivity

Developing Functionality in Perovskites from Abatement of Pollutants to Sustainable Energy Conversion and Storage

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