NbP catalyst for furfural production: FT IR studies of surface properties

Gómez-Bernal, H.; Galletti, Anna Maria Raspolli; Garbarino, Gabriella; Busca, Guido; Finocchio, Elisabetta

doi:10.1016/j.apcata.2015.06.031

Cited by 36 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At 170°C, D-xylose conversion (96%) and furfural yield (52%) were measured in aqueous-phase after 2 h. The reusability of the catalyst as evaluated from 3 runs seemed fairly good, however conditioned by thermal treatment in air at 500°C for 4 h between runs. Association of niobium and phosphate was done and the corresponding nobium phosphate (NbP) was tested for furfural production (Bernal et al, 2015 ). Nb 5+ ions were supported to act as Lewis exposed sites, showing medium strength acidity.…”

Section: Synthesis Of Furfural From Sugars and Polysaccharides Using mentioning

confidence: 99%

Hydrolysis of Hemicellulose and Derivatives—A Review of Recent Advances in the Production of Furfural

et al. 2018

View full text Add to dashboard Cite

Biobased production of furfural has been known for decades. Nevertheless, bioeconomy and circular economy concepts is much more recent and has motivated a regain of interest of dedicated research to improve production modes and expand potential uses. Accordingly, this review paper aims essentially at outlining recent breakthroughs obtained in the field of furfural production from sugars and polysaccharides feedstocks. The review discusses advances obtained in major production pathways recently explored splitting in the following categories: (i) non-catalytic routes like use of critical solvents or hot water pretreatment, (ii) use of various homogeneous catalysts like mineral or organic acids, metal salts or ionic liquids, (iii) feedstock dehydration making use of various solid acid catalysts; (iv) feedstock dehydration making use of supported catalysts, (v) other heterogeneous catalytic routes. The paper also briefly overviews current understanding of furfural chemical synthesis and its underpinning mechanism as well as safety issues pertaining to the substance. Eventually, some remaining research topics are put in perspective for further optimization of biobased furfural production.

show abstract

Section: Synthesis Of Furfural From Sugars and Polysaccharides Using mentioning

confidence: 99%

Hydrolysis of Hemicellulose and Derivatives—A Review of Recent Advances in the Production of Furfural

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The first catalyst tested was niobium phosphate (NbP), a solid acid active also in the acid hydrolysis of raw biomass. This catalyst presents both terminal POH and NbOH groups which behave as Brønsted acidic sites, whereas Nb 5+ coordinatively unsaturated exposed sites confer Lewis acidity of medium strength; the acid capacity of this material is 0.33 meq H + /g [31,32]. At 120°C and the lowest catalyst loading (run IL1) only 40% FA was converted reaching barely 4% yield of iPrL and 36% yield of isopropyl furfuryl ether (iPrFE), the latter has been reported as an intermediate for alkyl levulinate formation [33][34][35].…”

Section: Alcoholysis Of Furfuryl Alcohol To Yield Isopropyl Levulinate (Iprl)mentioning

confidence: 99%

Synthesis of isopropyl levulinate from furfural: Insights on a cascade production perspective

Gómez-Bernal

Benito

Rodríguez‐Castellón

et al. 2019

Applied Catalysis A: General

View full text Add to dashboard Cite

The present work explores the production of isopropyl levulinate from furfural by a two-step microwave assisted cascade process. Furfural is a versatile biomass-derived industrial feedstock with high annual production volume. Alkyl levulinates are promising bio-based molecules with several applications in many sectors, in particular, as biofuels, blended with transportation fuels including biodiesel, these compounds can significantly reduce the formation of soot in engines.Thus, in the first step, the catalytic transfer hydrogenation of furfural to furfuryl alcohol was studied employing a simply "ad hoc" synthesized magnetically recoverable Cu catalyst and 2-propanol as H-donor. Subsequently, the alcoholysis of the previously obtained liquors rich in furfuryl alcohol or of neat furfuryl alcohol solutions to isopropyl levulinate was investigated using commercial solid acid catalysts such as niobium phosphate and Amberlyst sulfonic resins (A15 and A70).The cascade process resulted feasible leading to good furfuryl alcohol yields in the transfer hydrogenation process with Cu-Fe 3 O 4 magnetic catalyst using much lower Cu to furfural molar ratios than commonly reported. The subsequent alcoholysis step of furfuryl alcohol-rich liquors was highly efficient with A70 resin even in presence of unreacted furfural from the first step.

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

NbP catalyst for furfural production: FT IR studies of surface properties

Cited by 36 publications

References 34 publications

Hydrolysis of Hemicellulose and Derivatives—A Review of Recent Advances in the Production of Furfural

Hydrolysis of Hemicellulose and Derivatives—A Review of Recent Advances in the Production of Furfural

Synthesis of isopropyl levulinate from furfural: Insights on a cascade production perspective

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

Contact Info

Product

Resources

About