Investigation of microwave-assisted pyrolysis of biomass with char in a rectangular waveguide applicator with built-in phase-shifting

Ellison, Candice; Hoff, Ryan T.; Mărculescu, Cosmin; Boldor, Dorin

doi:10.1016/j.apenergy.2019.114217

Cited by 62 publications

(10 citation statements)

References 36 publications

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“…It was then mixed with the biomass before the heat treatment. Relatively high moisture content is a desirable characteristic in microwave biomass pyrolysis as it plays a role in the initial microwave absorption and allows increasing the raw material temperature to the water boiling point [23]. The proximate analysis of biomass is of paramount importance for biomass energy use.…”

Section: Methodsmentioning

confidence: 99%

Microwave-Assisted Pyrolysis of Pine Wood Sawdust Mixed with Activated Carbon for Bio-Oil and Bio-Char Production

et al. 2020

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Pyrolysis of pine wood sawdust was carried out using microwave-heating technology in the presence of activated carbon (AC). Experimental conditions were of 20 min processing time, 10 wt.% of AC, and a microwave power varying from 100 to 800 W. The results obtained showed that the microwave absorber allowed increasing the bio-oil yield up to 2 folds by reducing the charcoal fraction. The maximum temperature reached was 505 °C at 800 W. The higher heating values (HHV) of the solid residues ranged from 17.6 to 30.3 MJ/kg. The highest HHV was obtained for the sample heated at 800 W with 10 wt.% of AC, which was 33% higher than the non-charged sample heated at the same power. Furthermore, the addition of AC allowed showing the probable catalytic effect of the AC in the charged sample pyrolysis bio-oils.

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Section: Methodsmentioning

confidence: 99%

Microwave-Assisted Pyrolysis of Pine Wood Sawdust Mixed with Activated Carbon for Bio-Oil and Bio-Char Production

et al. 2020

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“…A three-stub tuner can significantly improve efficiency as it is able to maximize the electric field from the point of generation to the distance of the reactor, substantially reducing reflected power within the system [25]. An isolator assists in protecting the magnetron from damage that can be caused by reflected microwaves [26,27]. The reactor, various carrier gases, and other inputs that are fed into said reactor will be discussed further in the next section.…”

Section: Emipg System Physical Descriptionmentioning

confidence: 99%

CFD Modeling of a Lab-Scale Microwave Plasma Reactor for Waste-to-Energy Applications: A Review

Sedej

Mbonimpa

2021

Gases

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Rapidly increasing solid waste generation and energy demand are two critical issues of the current century. Plasma gasification, a type of waste-to-energy (WtE) technology, has the potential to produce clean energy from waste and safely destroy hazardous waste. Among plasma gasification technologies, microwave (MW)-driven plasma offers numerous potential advantages to be scaled as a leading WtE technology if its processes are well understood and optimized. This paper reviews studies on modeling experimental microwave-induced plasma gasification systems. The system characterization requires developing mathematical models to describe the multiphysics phenomena within the reactor. The injection of plasma-forming gases and carrier gases, the rate of the waste stream, and the operational power heavily influence the initiation of various chemical reactions that produce syngas. The type and kinetics of the chemical reactions taking place are primarily influenced by either the turbulence or temperature. Navier–Stokes equations are used to describe the mass, momentum, and energy transfer, and the k-epsilon model is often used to describe the turbulence within the reactor. Computational fluid dynamics software offers the ability to solve these multiphysics mathematical models efficiently and accurately.

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“…Nowadays energy from biomass is obtained mainly by combustion or cocombustion of solid biofuels with fossil fuels. Another promising approach to biomass utilization is the thermochemical conversion of biomass: gasification, liquefaction, hydropyrolysis, and pyrolysis [1][2][3][4]. Pyrolysis of biomass allows its deep conversion and high yield (up to 70 wt.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Refining Process Profitability for Biofuel Production – Rapeseed Pyrolytic Oil Case Study

Pstrowska¹,

Walendziewski²

2021

Pol. J. Environ. Stud.

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On the basis of the 1 H, 13 C NMR and FT-IR spectroscopic results, elemental analysis and acid hydroxide group content analysis, the chemical structure of liquid fractions from pyrolysis of rapeseed treatment products was discussed. All the examined pyrolysis products contain a large number of unstable olefins as well as oxygen and nitrogen in aromatic rings or side hydrocarbon chains in aromatics. Although the liquid fractions obtained by pyrolysis of rapeseed and rapeseed processing products are potentially valuable fuel or fuel components, they need refining treatment. The best method, in this case, seems to be the hydrorefining process. It was shown that the hydrotreatment of such a complex composition requires incurring the costs of hydrogen for refining and construction costs of relevant installations or using existing ones in the nearest refinery. The costs of biofuel production from studied liquid pyrolysis products and other biomass-derived fractions should include the raw material costs as the logistics, i.e. transport of biomass and pyrolytic oils to the place of their pyrolysis or refining. In many cases, the costs of producing liquid fuels by biomass pyrolysis can be comparable or even higher than the value of the biofuel produced.

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Investigation of microwave-assisted pyrolysis of biomass with char in a rectangular waveguide applicator with built-in phase-shifting

Cited by 62 publications

References 36 publications

Microwave-Assisted Pyrolysis of Pine Wood Sawdust Mixed with Activated Carbon for Bio-Oil and Bio-Char Production

Microwave-Assisted Pyrolysis of Pine Wood Sawdust Mixed with Activated Carbon for Bio-Oil and Bio-Char Production

CFD Modeling of a Lab-Scale Microwave Plasma Reactor for Waste-to-Energy Applications: A Review

Assessment of the Refining Process Profitability for Biofuel Production – Rapeseed Pyrolytic Oil Case Study

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