Aviation biofuel range cycloalkane from renewables: Liquid-phase catalytic conversion of menthol on niobia-supported catalysts

Gabriel, Catarine B.; Canhaci, Simone J.; Borges, Luiz Eduardo Pizarro; Fraga, Marco A.

doi:10.1016/j.fuel.2020.118288

Cited by 9 publications

(7 citation statements)

References 36 publications

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“…Nb 2 O 5 presents the lowest density of acid sites, which are mostly weak/moderate in strength considering desorption up to 350 °C. These qualitative and quantitative results are in line with previous studies on similar catalysts [37,38] …”

Section: Resultssupporting

confidence: 93%

“…These qualitative and quantitative results are in line with previous studies on similar catalysts. [37,38] It is well reckoned that these Nb-based materials can combine both Brønsted and Lewis acidity. [39,40] While Lewis acid sites have been attributed to tetrahedrally coordinated Nb 5 + species in distorted NbO x structural units, [41][42][43] Brønsted centers are associated with bridging and terminal polarized hydroxyl groups in Nb 2 O 5 (NbÀ OH) and phosphate moieties (PÀ OH) in NbOPO 4 samples.…”

Section: Chemcatchemmentioning

confidence: 99%

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Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

et al. 2023

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Levulinic acid and angelica lactones are important building blocks obtained from hemicellulose. This process comprises multiple chemical reactions at which furfuryl alcohol is an intermediate, but only few studies have investigated its hydrolysis. This work studied the role played by the nature of acid sites and the impact of their strength and amount on furfuryl alcohol hydrolysis over Nb2O5 and NbOPO4. It was disclosed that production of levulinic acid is a two‐step cascade reaction at which angelica lactones are intermediates. These two hydrolysis steps were catalyzed by Brønsted acid sites with no contribution from Lewis centers. Brønsted acidity of Nb2O5 presented no activity while phosphate moieties on NbOPO4 were effective. Mixtures of organic solvent and water hindered side reactions, improving selectivity to valued bioproducts. 1,4‐dioxane was the most suitable organic solvent. This study shows that selectivity of 96 % of levulinic acid and angelica lactones can be accomplished over NbOPO4.

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Section: Resultssupporting

confidence: 93%

Section: Chemcatchemmentioning

confidence: 99%

Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

et al. 2023

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“…Niobium has been used in catalytic systems in the form of oxides, phosphates, and various modified formulations as support, as a promoter, or as the active phase (Guerrero-Pérez, 2020). In the last years, mainly due to their acidic and redox properties, the niobium-based catalysts have been studied for several different reactions, such as alcohol dehydration (Hilda Gomez Bernal et al, 2015;Catrinck et al, 2017;Gabriel et al, 2020;C. García-Sancho, Agirrezabal-Telleria, et al, 2014;C.…”

Section: Niobium Compounds Catalysts and Their Propertiesmentioning

confidence: 99%

Uso de compostos de nióbio como catalisadores na produção de biocombustíveis: uma revisão

Moreira¹,

Souza²,

Silva³

et al. 2022

J. Eng. Exact Sci.

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A necessidade de substituir combustíveis fósseis por biocombustíveis não é um tema recente na comunidade acadêmica. Pesquisadores estudam e desenvolvem combustíveis alternativos há décadas e, com isso, combustíveis como o biodiesel e o etanol de primeira geração se consolidaram no mercado. No entanto, esses biocombustíveis de primeira geração competem com a indústria de alimentos, o que afeta sua oferta e preço. Por outro lado, os combustíveis de segunda geração são produzidos a partir de biomassa lignocelulósica e resíduos orgânicos de atividades urbanas e agroindustriais, não competindo com a indústria de alimentos. No entanto, a maioria desses processos ainda não é economicamente viável. Duas das principais contribuições para essa inviabilidade são o baixo desempenho dos processos (baixa conversão da matéria-prima e baixa seletividade dos produtos de interesse) e o alto custo dos catalisadores, que muitas vezes são feitos de metais nobres de pouca disponibilidade. O Nióbio é um metal com diversas aplicações, mas ainda pouco explorado industrialmente como catalisador, apesar de possuir propriedades interessantes para essa finalidade. Este artigo de revisão compila trabalhos envolvendo o uso do nióbio e seus compostos como catalisador em diversos processos de produção de biocombustíveis, como esterificação, pirólise, liquefação, síntese Fischer-Tropsch, desoxigenação, entre outros. Além da revisão da literatura, este artigo apresenta uma análise crítica a respeito das aplicações de cada processo e tecnologia, bem como das pesquisas desenvolvidas pelos autores.

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“…Cyclic ethers, alcohols, and acetates can also be efficiently converted into p-menthane. For example, geraniol [33][34][35] , menthol 33,36 , α-terpineol 33 , and nerol 35 , have all been used as precursors to p-menthane. Furthermore, ethers, including 1,8-cineole (eucalyptol), can be converted to p-menthane by tandem deoxygenation/hydrogenation methods 37,38 .…”

mentioning

confidence: 99%

Solvent-free dehydration, cyclization, and hydrogenation of linalool with a dual heterogeneous catalyst system to generate a high-performance sustainable aviation fuel

et al. 2022

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The development of efficient catalytic methods for the synthesis of bio-based, full-performance jet fuels is critical for limiting the impacts of climate change while enabling a thriving modern society. To help address this need, here, linalool, a terpene alcohol that can be produced via fermentation of biomass sugars, was dehydrated, cyclized, and hydrogenated in a one-pot reaction under moderate reaction conditions. This sequence produced a biosynthetic fuel mixture primarily composed of 1-methyl-4-isopropylcyclohexane (p-menthane) and 2,6-dimethyloctane (DMO). The reaction was promoted by a catalyst composed of commercial Amberlyst-15, H+ form, and 10% Pd/C. Two other terpenoid substrates (1,8-cineole and 1,4-cineole) were subjected to the same conditions and excellent conversion to high purity p-menthane was observed. The fuel mixture derived from linalool exhibits a 1.7% higher gravimetric heat of combustion and 66% lower kinematic viscosity at −20 °C compared to the limits for conventional jet fuel. These properties suggest that isomerized hydrogenated linalool (IHL) can be blended with conventional jet fuel or synthetic paraffinic kerosenes to deliver high-performance sustainable aviation fuels for commercial and military applications.

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Aviation biofuel range cycloalkane from renewables: Liquid-phase catalytic conversion of menthol on niobia-supported catalysts

Cited by 9 publications

References 36 publications

Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Uso de compostos de nióbio como catalisadores na produção de biocombustíveis: uma revisão

Solvent-free dehydration, cyclization, and hydrogenation of linalool with a dual heterogeneous catalyst system to generate a high-performance sustainable aviation fuel

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