An efficient microwave-assisted green transformation of cellulose into levoglucosenone. Advantages of the use of an experimental design approach

Sarotti, Ariel M.; Spanevello, Rolando A.; Suárez, Alejandra G.

doi:10.1039/b703690f

Cited by 101 publications

(60 citation statements)

References 23 publications

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“…Theoretically, microwaves could heat biomass materials at very high rates due to the volumetric heating and this process is likely to offer significant efficiencies over conventional resistively heated reactors. There have been few reports on microwave catalytic pyrolysis in the literature [50,51], however non-catalytic microwave pyrolysis of biomass materials such as cellulose [52][53][54] and lignin/wood [51,55,56] [57] report the microwave pyrolysis of corn stover and the bio-oils properties were determined. Stover was heated for 40 min at 600 W but no heating rate was recorded.…”

Section: Challenges With Catalytic Fast Pyrolysismentioning

confidence: 99%

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

et al. 2009

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The conversion of biomass compounds to aromatics by thermal decomposition in the presence of catalysts was investigated using a pyroprobe analytical pyrolyzer. The first step in this process is the thermal decomposition of the biomass to smaller oxygenates that then enter the catalysts pores where they are converted to CO, CO 2 , water, coke and volatile aromatics. The desired reaction is the conversion of biomass into aromatics, CO 2 and water with the undesired products being coke and water. Both the reaction conditions and catalyst properties are critical in maximizing the desired product selectivity. High heating rates and high catalyst to feed ratio favor aromatic production over coke formation. Aromatics with carbon yields in excess of 30 molar carbon% were obtained from glucose, xylitol, cellobiose, and cellulose with ZSM-5 (Si/Al = 60) at the optimal reactor conditions. The aromatic yield for all the products was similar suggesting that all of these biomass-derived oxygenates go through a common intermediate. At lower catalyst to feed ratios volatile oxygenates are formed including furan type compounds, acetic acid and hydroxyacetaldehyde. The product selectivity is dependent on both the size of the catalyst pores and the nature of the active sites. Five catalysts were tested including ZSM-5, silicalite, beta, Y-zeolite and silica-alumina. ZSM-5 had the highest aromatic yields (30% carbon yield) and the least amount of coke.

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Section: Challenges With Catalytic Fast Pyrolysismentioning

confidence: 99%

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

et al. 2009

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“…The highest LGO yield reached 34 wt% from microcrystalline cellulose impregnated with 2% phosphoric acid, or 17.5 wt% from birch wood impregnated with 2.5% phosphoric acid. Other studies also confirmed the promising catalytic selectivity of the phosphoric acid on the LGO production (Sarotti et al, 2007;Fu et al, 2008b;Nowakowski et al, 2008). Furthermore, Dobele et al (2005) reported that the pretreatment of cellulose/biomass with adsorption of Fe 2 (SO 4 ) 3 provided another way to prepare LGO with high purity, but the selectivity of the Fe 2 (SO 4 ) 3 on the LGO was a little lower than the phosphoric acid.…”

Section: Levoglucosenonementioning

confidence: 61%

Production of Chemicals from Selective Fast Pyrolysis of Biomass

Zhu¹,

Lü²

2010

Biomass

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“…O grupo de Spanevello explorou o uso dessa substância em síntese assimétrica. 43 O seu uso como reagente químico tem basicamente três grandes estratégias. A mais comum é a transformação radical da sua estrutura, por meio de processos químicos ou bioquímicos , como pode ser visto no Esquema 9.…”

Section: O Uso De Biomassa Renovável No Contexto Atualunclassified

Green Chemistry, Sustainable Economy and Quality of Life

Ferreira¹,

Rocha²,

Silva³

2014

Revista Virtual De Química

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Abstract:Despite the early problems linked to industrial activities related to chemistry date back to the early twentieth century, and issues such as green chemistry and sustainability have been already discussed in academic and industrial environments. Green chemistry is good for the environment, human health and the economy, but there are still many mysteries in the "green field". In this article, the authors attempt to repackage the "green" concept of the chemistry focused on the needs of developing new processes and broader reflections on global and sustainable economy and quality of life.Keywords: Green chemistry; sustainability; quality of life; environment. ResumoA imagem da Química tem sido relacionada a problemas oriundos de atividades industriais desde o início do século XX. Seus reflexos no meio ambiente reforçam a necessidade da redução de riscos em produtos e processos, e temas como Química Verde e sustentabilidade vêm sendo discutidos nos meios acadêmicos e industriais. A Química Verde é boa para o meio ambiente, a saúde humana e economia, mas ainda existem muitas "sombras" no verde. Neste artigo, os autores discutem o conceito "verde" da Química, voltado para o desenvolvimento de novos processos, e de uma reflexão mais ampla e global sobre economia sustentável e qualidade de vida.Palavras-chave: Química verde; sustentabilidade; qualidade de vida; meio ambiente.

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An efficient microwave-assisted green transformation of cellulose into levoglucosenone. Advantages of the use of an experimental design approach

Cited by 101 publications

References 23 publications

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

Production of Chemicals from Selective Fast Pyrolysis of Biomass

Green Chemistry, Sustainable Economy and Quality of Life

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