Advanced in conversion of hemicellulosic biomass to furfural and upgrading to biofuels. Catal Sci Tech 2:2025-2036

Catalysis Science & Technology (Impact Factor: 5.43). 10/2012; DOI: 10.1039/c2cy20235b


Recent approaches to furfural synthesis from hemicellulosic biomass and pentose sugars with both homogeneous and solid acidic catalysts have been summarized by addressing the associated sustainability issues. The features of deconstruction of hemicellulosic biomass by acid hydrolysis to produce pentose sugar feedstock for furfural have been discussed in brief. Several strategies including solvent extraction in a biphasic process, application of surface functionalized materials such as acidic resins, mesoporous solids and mechanistic insight in limited cases are discussed. The present status of the promising furfural platform in producing second generation biofuels (furanics and hydrocarbon) is reviewed. The performances of each catalytic system are assessed in terms of intrinsic reactivity and selectivity toward furfural production. Overall, this minireview attempts to highlight the scope of further developments for a sustainable furfural process and upgrading to fuels.

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Available from: Imteyaz Alam
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    • "However, it is apparent that use of acidic heterogeneous catalyst i.e. solid acid catalyst is advantageous over homogeneous acid catalysts. But, most of the solid acid catalyst (sulfonated mesoporous silica, sulfonated carbon, heteropoly acid, ion-exchanged resin, sulfonated metal oxide, zeolite etc.) used for furfural synthesis fails to remain stable under hydrothermal reaction conditions due to their less stability [3] [4]. Additionally, use of edible sugar is not practically good option since it may create food crisis and also, it has to be obtained from profusely available hemicellulose part of lignocellulosic biomass. "
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    ABSTRACT: In this work, renewable and profusely available crop wastes (plant-derived lignocellulosic biomass) were used as substrate for furfural synthesis. Seven crop wastes (BG-I, BG-II, BG-III, RH-I, RH-II, RH-III and WS) were collected, analyzed to know its compositions and used as substrate for furfural synthesis. In presence of SAPO-44 catalyst, an extremely high amount (86-93%) of furfural formation was observed from one-pot processing of crop wastes at 170C. Moreover, the SAPO-44 catalyst showed a very stable activity in minimum 8 recycle runs. Various physico-chemical characterization methods were adopted to understand SAPO-44 catalyst properties in detail and thus, suitable catalyst structure-activity relations were drawn.
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    • "Dias,A.S.,Pillinger,M.,&Valente,A.A.(2005).Dehydrationof xyloseintofurfuralovermicro-mesoporoussulfonicacidcatalysts.J. Catal.,229,414-423. [18]Dutta,S.,De,S.,Saha,B.,&Alam,M.I.(2012a).Advancesincon- versionofhemicellulosicbiomasstofurfuraland "
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    ABSTRACT: Recently, furfural, “the sleeping beauty bio-renewable chemical” has gained a renewed attention as a potential chemical for the production of biofuels and biochemicals. Furfural is the most commonly produced industrial chemical because its production is very flexible. It is one of the top value-added chemicals that can be produced from biomass. Furfural and its derivatives have been extensively used in plastics, pharmaceutical and agrochemical industries. Furfural is a natural precursor to a range of furan-based chemicals and solvents such as dihydropyran, methyltetrahydrofuran, tetrahydrofuran, methylfuranfurfuryl alcohol, tetrahydrofurfuryl alcohol and furoic acid. Furfural and its derivatives have been widely applied as fungicides and nematicides, transportation fuels, gasoline additives, lubricants, resins, decolorizing agents, jet fuel blend stocks, drugs, insecticides, bio-plastics, flavor enhancers for food and drinks, rapid all-weather repair system for bomb-damaged runways and pot holes and also for wood modification and book preservation.
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    • "An experimental design of factorial 2 4À1 was carried out to optimize hydrolysis conditions (Table S2). The limits for hydrolysis conditions, especially the temperature below 100 °C, were chosen to restrict the xylose dehydration into furfural as described in recent reviews [25] [30] [32] [41] [42]. "
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    ABSTRACT: The purpose of this study is to target well-defined xylooligosaccharides by controlled sulfuric acidic hydrolysis of beechwood xylans. Parameters such as sulfuric acid and xylan concentrations, hydrolysis duration and temperature have been investigated, allowing optimum conditions to be determined (0.7 M H2SO4, 90 °C, 45 min). The obtained xylooligosaccharides show a well-defined structure and have been characterized using several techniques such as 1D and 2D nuclear magnetic resonance spectrometry and matrix-assisted laser desorption/ionization-time of flight mass spectrometry. This work demonstrated that mild acidic hydrolysis conditions enable the reproducible production of xylooligosaccharides containing, on average, six xylose units and only one 4-O-methyl-D-glucuronic acid unit likely positioned at the non-reductive chain-end.
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