The role of ruthenium on the acidity of mixed alumina and silica phases and its impact on activity for ethanol dehydration

Kamsuwan, Tanutporn; Jongsomjit, Bunjerd; Herrera, José E.

doi:10.1002/cjce.24147

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…Ru/C is most effective with hydrogen loading because the hydrogen gas can be used as a reactant during a metathesis reaction to saturate a double bond with hydrogenation 68 . In presence of Ru/C, dehydration of ethanol into ethene can occur, from which radical polymerization can occur resulting in higher amounts of aliphatic chain 69 …”

Section: Resultsmentioning

confidence: 99%

“…68 In presence of Ru/C, dehydration of ethanol into ethene can occur, from which radical polymerization can occur resulting in higher amounts of aliphatic chain. 69 Due to ethanol not being a substantial product in any of the liquid products, it is proposed that the ethanol products react extremely quickly when produced. The solid char mechanism implies that the majority of the solid product are aliphatic compounds due to the clear peak at 2900 cm the solid char.…”

Section: Proposed Stl Reaction Mechanismmentioning

confidence: 99%

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Solvothermal liquefaction of waste polyurethane using supercritical toluene in presence of noble metal catalysts

et al. 2022

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Solvothermal liquefaction (STL) is a thermochemical conversion method that uses sub-or supercritical solvents to convert waste plastics like waste polyurethane (PU) into value-added chemicals. This study aimed to evaluate catalytic STL utilizing toluene as a solvent for depolymerization of waste PU into valuable products. The effect of catalyst type (Pt/C, Pd/C, and Ru/C), catalyst loading (0-10 wt%), STL reaction temperature (330 C, 350 C, and 370 C), STL residence time (1, 3, and 5 h), and hydrogen loading (25, 50, and 75 bar) on STL conversion were studied. Results showed that Ru/C outperformed Pt/C and Pd/C and the STL conversion reached to as high as 87.2%. The concentrations of nitrogen-containing components like aniline and p-aminotoluene were increased with the increase of Ru/C loading and STL reaction temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Proposed Stl Reaction Mechanismmentioning

confidence: 99%

Solvothermal liquefaction of waste polyurethane using supercritical toluene in presence of noble metal catalysts

et al. 2022

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“…In addition to Pd and Ag, other noble metals such as Pt, Au, Ru, and Rh are also reported for ethanol upgradation, though only limited studies are available on ethanol dehydrogenation or decomposition. ,,,,,− Yee et al compared the performance of Pd, Pt, and Rh catalysts supported on ceria for hydrogen abstraction from ethanol . All the three catalysts showed the formation of ethoxide intermediate that subsequently decomposes to acetaldehyde.…”

Section: Catalysts For Ethanol Dehydrogenation and Decompositionmentioning

confidence: 99%

Ethanol Decomposition and Dehydrogenation for Hydrogen Production: A Review of Heterogeneous Catalysts

Kumar

2021

Ind. Eng. Chem. Res.

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Biowaste derived ethanol is an important feedstock for carbon neutral hydrogen production. It is liquid at atmospheric conditions, has a high hydrogen to carbon ratio, and it can be generated from biomass, lignocellulosic wastes, and sewage sludge, offering opportunities for converting waste to hydrogen as an alternative to fossil fuels-based sources of hydrogen. A large-scale application of bioethanol for hydrogen production has the potential to considerably reduce CO2 emissions. Recent reviews on ethanol reforming for hydrogen production show a growth in research interest in this topic, although primarily focused on ethanol steam reforming (ESR) in which steam, in addition to ethanol, also acts as an additional source of hydrogen. Ethanol partial oxidation (POx) is another relatively well-studied route, which is exothermic in nature; however, hydrogen selectivity can be compromised due to the presence of oxygen leading to water formation. Ethanol decomposition and dehydrogenation (ED) are relatively less studied compared to the other two routes, possibly due to coke formation that often leads to catalyst deactivation. The past decade has seen an increasing number of papers on ED to exploit it for the production of aldehydes, acetates, and ethers, as well as various forms of carbon along with hydrogen. The goal of this article is to provide a review on the recent development in nonoxidative ethanol dehydrogenation and ethanol decomposition catalysis for hydrogen production. Catalytic studies over the past few decades have benefitted from the unprecedented growth in experimental techniques, particularly from in situ transmission electron microscopy (in situ TEM) and near ambient X-ray photoelectron spectroscopy (NA-XPS), allowing researchers to obtain dynamic structural information caused by reactant–catalyst interactions leading to greater insights based on more realistic information. A review incorporating the current status will allow us to better understand the structure–performance relationship, leading to the implementation of practical and realistic considerations for catalysts synthesis and reactor design for stable performance. The present review is an attempt to put together the recent progress, mainly in the past decade, on the catalysts for ethanol dehydrogenation, experimental conditions for effective extraction of hydrogen and targeted products, and metal–support interactions and their contribution in directing the reaction pathways. For the ease of reading and comprehension, the article is divided into subsections based on metals (transition metals and noble metals) and supports. The review concludes with a table listing the catalysts, synthesis method, reaction environments, and key findings for a quick and easy access to the critical systems assessed during the review process.

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Amination of n‐hexanol to n‐hexylamine over RuNi bimetallic catalyst

Gao,

Huang,

Rehman

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDThe synthesis of fatty amines via fatty alcohol amination offers a promising avenue for environmentally friendly production, particularly when compared with the methods employing hydrocyanic acid which often involve significant emissions.RESULTThis study explores the synthesis of n‐hexylamine through one‐step amination of n‐hexanol utilizing a series of Ru‐doped Ni catalysts supported over γ‐Al2O3, achieving 61% n‐hexanol yield, 35% dihylamine yield and 3.5% trihylamine yield at the n‐hexanol conversion of 99%.CONCLUSIONThe characterization results of the catalysts revealed a significant interaction between ruthenium and nickel in the bimetallic catalysts, leading to the enhanced reducibility of Ni species and improved metal dispersion. Moreover, ruthenium species were found to play an important role in the dissociation of NH3 into NHx (x = 1, 2), thereby significantly improving the dehydrogenation process of n‐hexanol at Ni sites. The synergistic effect between the two kinds of metal sites emerges as crucial factor for the boosted alcohols amination process. © 2024 Society of Chemical Industry (SCI).

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The role of ruthenium on the acidity of mixed alumina and silica phases and its impact on activity for ethanol dehydration

Cited by 5 publications

References 39 publications

Solvothermal liquefaction of waste polyurethane using supercritical toluene in presence of noble metal catalysts

Solvothermal liquefaction of waste polyurethane using supercritical toluene in presence of noble metal catalysts

Ethanol Decomposition and Dehydrogenation for Hydrogen Production: A Review of Heterogeneous Catalysts

Amination of n‐hexanol to n‐hexylamine over RuNi bimetallic catalyst

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