A Feasibility Study on a Continuous-flow-type Microwave Pretreatment System for Bioethanol Production from Woody Biomass

Mitani, Tomohiko; Oyadomari, Masafumi; Suzuki, Hiroaki; Yano, Katsuyuki; Shinohara, Naoki; Tsumiya, Takahiko; Sego, Hisayuki; Watanabe, Takashi

doi:10.3775/jie.90.881

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…With the same pretreatment condition at 190°C for 30 min, microwave heating obtained an enzymatic hydrolysis ratio of 58.5% which was 53% higher than that by conventional heating. The researchers from Kyoto university Mitani et al, 2011) used an acerbic organic solvent system as the microwave absorbing medium for softwood pretreatment. The results showed that saccharification ratio was increased by 5.23% compared to that with ordinary heating.…”

Section: Acidmentioning

confidence: 99%

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Microwave irradiation – A green and efficient way to pretreat biomass

Yang

et al. 2016

Bioresource Technology

192

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Section: Acidmentioning

confidence: 99%

“…Another Japanese research group has developed a similar continuous microwave pretreatment reactor (Mitani et al, 2011). Its main body was a metal pipe but not a ceramic tube.…”

Section: Continuous Mwi Pretreatment Reactormentioning

confidence: 99%

Microwave irradiation – A green and efficient way to pretreat biomass

Yang

et al. 2016

Bioresource Technology

192

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“…In conventional studies, pretreatment reactors with microwave irradiation was presented [12]- [14]. However, the proposed reactors in the conventional studies were the small capacity experiment system for laboratory.…”

Section: Introductionmentioning

confidence: 99%

Pilot-Plant Scale 12 kW Microwave Irradiation Reactor for Woody Biomass Pretreatment

Hasegawa

Mitani

Shinohara

et al. 2014

IEICE Trans. Electron.

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A simple, low reflection, and highly-efficient pilot-plant scale microwave irradiation reactor for woody biomass pretreatment was fabricated. Pretreatment is an essential process for effective bioethanol production. The fabricated reactor consists of 8 microwave irradiators which are attached to a metal pipe. The woody biomass mixture which contains water and organic acid flows through the metal pipe and is heated by microwaves at a total power of 12 kW. To design the microwave irradiators, we used a 3D Finite Element Method (FEM) simulator, which was based on the measured complex permittivity data of the woody biomass mixture. The simulation results showed that the reflection coefficient |S 11 | from the reactor was less than −30 dB when the woody biomass mixture temperature was between 30 • C and 90 • C. Finally, we experimentally confirmed that the fabricated irradiation reactor yielded a microwave absorption efficiency of 79%. key words: Microwave heating, permittivity measurement, finite element method, magnetron neers (IEICE) and the Institute of Electrical Engineers of Japan (IEEJ) Masakazu Daidaireceived the B.E., M.E., and Ph.D. degree in chemical engineering from

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“…5 show photographs of the 3.6 kW and 15 kW microwave pretreatment reactors, respectively 49) . These reactors have quite similar structures.…”

Section: Continuous Flow-type Microwave Reactors For Pretreatment mentioning

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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A Feasibility Study on a Continuous-flow-type Microwave Pretreatment System for Bioethanol Production from Woody Biomass

Cited by 9 publications

References 5 publications

Microwave irradiation – A green and efficient way to pretreat biomass

Microwave irradiation – A green and efficient way to pretreat biomass

Pilot-Plant Scale 12 kW Microwave Irradiation Reactor for Woody Biomass Pretreatment

Recent Progress on Microwave Processing of Biomass for Bioenergy Production

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