Tunable microwave-assisted aqueous conversion of seaweed-derived agarose for the selective production of 5-hydroxymethyl furfural/levulinic acid

Francavilla, Matteo; Intini, Simona; Luchetti, Luciana; Luque, Rafael

doi:10.1039/c6gc02072k

Cited by 45 publications

(25 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrolysis of algal polysaccharides is usually carried out in the presence of acidic catalyst, such as Brønsted acid, metal chlorides, and heterogeneous catalysts such as HZSM-5 and Sn-Beta. Over these catalysts, highly selective chemicals such as rhamnose, 5-HMF, levulinic acid or lactic acid are formed [150][151][152][153][154]. 5The research of algal biorefinery should also focus on improvement of the process, in order to realize the commercialization and industrialization.…”

Section: Discussionmentioning

confidence: 99%

Catalytic Thermochemical Conversion of Algae and Upgrading of Algal Oil for the Production of High-Grade Liquid Fuel: A Review

Zhou

2020

Catalysts

View full text Add to dashboard Cite

The depletion of fossil fuel has drawn growing attention towards the utilization of renewable biomass for sustainable energy production. Technologies for the production of algae derived biofuel has attracted wide attention in recent years. Direct thermochemical conversion of algae obtained biocrude oil with poor fuel quality due to the complex composition of algae. Thus, catalysts are required in such process to remove the heteroatoms such as oxygen, nitrogen, and sulfur. This article reviews the recent advances in catalytic systems for the direct catalytic conversion of algae, as well as catalytic upgrading of algae-derived oil or biocrude into liquid fuels with high quality. Heterogeneous catalysts with high activity in deoxygenation and denitrogenation are preferable for the conversion of algae oil to high-grade liquid fuel. The paper summarized the influence of reaction parameters and reaction routes for the catalytic conversion process of algae from critical literature. The development of new catalysts, conversion conditions, and efficiency indicators (yields and selectivity) from different literature are presented and compared. The future prospect and challenges in general utilization of algae are also proposed.

show abstract

Section: Discussionmentioning

confidence: 99%

Catalytic Thermochemical Conversion of Algae and Upgrading of Algal Oil for the Production of High-Grade Liquid Fuel: A Review

Zhou

2020

Catalysts

View full text Add to dashboard Cite

show abstract

“…Cellulose and other polysaccharide fractions extracted from seaweeds can be converted to ethanol, levulinic acid and its derivatives, including ethyl levulinate, which can be used as a fuel additive for both diesel and biodiesel (Jeong et al 2015, Francavilla et al 2016, Trivedi et al 2016. Seaweed biomass has almost no lignin, therefore conversion costs could be lower than those incurred using cellulosic biomass.…”

Section: Downstream Process For Extraction Of Seaweed Productsmentioning

confidence: 99%

Seaweed resources in India – current status of diversity and cultivation: prospects and challenges

et al. 2019

View full text Add to dashboard Cite

Seaweeds are an integral part of coastal ecosystems and offer invaluable ecosystem services supporting the life of many marine forms. The economic value of seaweeds significantly contributes to the sustainable development of rural coastal regions. Seaweeds are consumed as food in some Asian countries, but their utilization for production of phycocolloids is widespread across the globe, with an estimated value of more than one billion US$. In India, seaweeds have been utilized exclusively for the production of phycocolloids but recently they are used for the production of plant growth stimulants for agricultural applications. The domestic agar and alginate industry totally depends on the supplies from natural seaweed beds with some occasional imports. The recent success achieved in both upstream and downstream technologies in production and processing of seaweeds has boosted the prospects for commercialization of seaweed resources in the country. The present article briefly appraises the current status of Indian seaweed resources and their utilization, as well as developments in seaweed farming technologies, the status of seaweed industry and recent efforts to transform seaweed farming into a social enterprise. It also highlights the challenges encountered for mainstreaming these resources so as to evolve into a marine industry.

show abstract

“…[11][12][13][14][15] In addition, the unique characteristics of microwave assisted reactions are attracting lot of attentions for the valorization of biomass. [16][17][18][19][20] Based on our experience in microwave chemistry, we have developed an environmentally friendly, simple and straightforward method for the valorization of pig bristles under microwave-assisted conditions. 17,18,[21][22][23][24] A low-toxicity mixture of ethylene glycol, copper chloride and pig bristles, was treated in a microwave oven to directly obtain pb-Cu2S avoiding any calcination steps.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18][19][20] Based on our experience in microwave chemistry, we have developed an environmentally friendly, simple and straightforward method for the valorization of pig bristles under microwave-assisted conditions. 17,18,[21][22][23][24] A low-toxicity mixture of ethylene glycol, copper chloride and pig bristles, was treated in a microwave oven to directly obtain pb-Cu2S avoiding any calcination steps. Where appropriate, a small amount of sodium hydroxide was used to optimize the synthesis and favour the formation of copper sulphide in the form of the more photocatalytically active Chalcocite crystals.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted valorization of pig bristles: towards visible light photocatalytic chalcocite composites

2018

Self Cite

View full text Add to dashboard Cite

Waste valorization for the production of valuable materials is of great importance for a sustainable development. Herein, a new green methodology for the synthesis of photocatalytically active copper sulfide (Cu2S) carbon composites using pig bristles is reported. The catalyst was prepared via microwave-assisted methodology using ethylene glycol as solvent, pig bristles as sulfur and carbon source, and copper chloride as metal precursor. Cu2S carbon composites (denoted as pb-Cu2S, where "pb" states for "pig bristle") were characterized by XRD, N2 physisorption, EDX and UV-Vis spectroscopy. In order to validate the practical utilization of pig bristles-derived chemicals , the photocatalytic degradation of methyl red using pb-Cu2S was investigated under white, blue, green and red visible light irradiation. Electronic Supplementary Information (ESI) available: The scheme of the photoreactor; the complete list of XPRD peaks; EDX mapping results; N2 adsorption−desorption isotherm of pb-Cu2S; See

show abstract

Tunable microwave-assisted aqueous conversion of seaweed-derived agarose for the selective production of 5-hydroxymethyl furfural/levulinic acid

Abstract: A simple, highly efficient and tunable microwave-assisted conversion of seaweed-derived agarose into 5-hydroxymethyl furfural (5-HMF) or levulinic acid (LA), depending on the reaction conditions, is reported.

Cited by 45 publications

References 44 publications

Catalytic Thermochemical Conversion of Algae and Upgrading of Algal Oil for the Production of High-Grade Liquid Fuel: A Review

Catalytic Thermochemical Conversion of Algae and Upgrading of Algal Oil for the Production of High-Grade Liquid Fuel: A Review

Seaweed resources in India – current status of diversity and cultivation: prospects and challenges

Microwave-assisted valorization of pig bristles: towards visible light photocatalytic chalcocite composites

Contact Info

Product

Resources

About