Microwave pyrolysis of biomass

Krieger-Brockett, Barbara

doi:10.1163/156856794x00054

Cited by 78 publications

(35 citation statements)

References 22 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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“…Large-sized feedstocks can be heated with microwave irradiation, and thus it is possible to reduce pretreatment processing costs. A few studies of MP of wood block (Krieger-Brockett, 1994;Miura et al, 2004) and corn stalk bale (Zhao et al, 2010) demonstrate that it is possible to pyrolyze thick blocks given that the heat exchanged from the external surface is lower than the heat produced by dielectric loss. The radiation energy is dissipated within the sample more or less uniformly, giving rise to much higher heating rates, although significant temperature gradients may be established between the hot internal regions and the surface of the sample (see Fig.…”

Section: Biomass Wastesmentioning

confidence: 99%

Microwave Heating Applied to Pyrolysis

Fernández¹,

Arenillas²,

Menéndez³

2011

Advances in Induction and Microwave Heating of Mineral and Organic Materials

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“…Microwave-assisted pyrolysis generally depends on microwave absorber such as carbonaceous, inorganic, and metal oxide materials 34) . Microwave-assisted pyrolysis without the absorber is possible, but requires high microwave power of 1000-2000 W 37) .…”

Section: Pyrolysismentioning

confidence: 99%

Recent Progress on Microwave Processing of Biomass for Bioenergy Production

Mitani

2018

J. Jpn. Petrol. Inst.

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Recent studies on microwave processing of biomass for bioenergy production are reviewed. Statistical review of published research papers related to microwave and biomass was used to classify microwave processing used in bioenergy production. Microwaves have potential for use in various processing methods such as pretreatment, gasification, pyrolysis, transesterification, extraction, liquefaction and drying, to achieve low energy consumption, rapid reaction time, and high production yield. Microwave-assisted processing technologies for the second generation biomass (lignocellulosic biomass) and third generation biomass (algae and seaweeds) are described, as first generation biomass (food crops such as sugar canes, corns and grains) is often discussed as a "fuel versus food" issue. Scale-up strategies and discussions on energy consumption, cost, and efficiency of the microwave processing are also described with reference to specific examples of microwave reactors. Understanding of dielectric properties of biomass mixture is crucially important for designing an efficient and robust microwave reactor. Microwave processing is a future promising technology for renewable energy production, although its industrialization is still unfulfilled.

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Microwave pyrolysis of biomass

Cited by 78 publications

References 22 publications

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

Aromatic Production from Catalytic Fast Pyrolysis of Biomass-Derived Feedstocks

Microwave Heating Applied to Pyrolysis

Recent Progress on Microwave Processing of Biomass for Bioenergy Production

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