Dielectric barrier discharge plasma microbubble reactor for pretreatment of lignocellulosic biomass
journal contributionposted on 2018-06-08, 13:09 authored by Alec Wright, Hemaka BandulasenaHemaka Bandulasena, Christopher Ibenegbu, D. Leak, Thomas Holmes, William B. Zimmerman, Alex Shaw, Felipe IzaFelipe Iza
A novel lignocellulosic biomass pretreatment reactor has been designed and tested to investigate pretreatment efficacy of miscanthus grass. The reactor was designed to optimise the transfer of highly oxidative species produced by dielectric barrier discharge plasma to the liquid phase immediately after generation, by arranging close proximity of the plasma to the gas-liquid interface of microbubbles. The reactor produced a range of reactive oxygen species and reactive nitrogen species, and the rate of production depended on the power source duty cycle and the temperature of the plasma. Ozone and other oxidative species were dispersed efficiently using energy efficient microbubbles produced by fluidic oscillations. A 5% (w/w) miscanthus suspension pretreated for 3 hr at 10% duty cycle yielded 0.5% acid soluble lignin release and 26% sugar release post hydrolysis with accelerated pretreatment towards the latter stages of the treatment demonstrating the potential of this approach as an alternative pretreatment method.
This work was supported by Plants to Products BBSRC NIBB for funding this project (POC-HD_RD0300 C and BB/L013819/1). AW would like to acknowledge school of AACME, Loughborough University and EPSRC (EP/M507908/1) for PhD studentship.
- Mechanical, Electrical and Manufacturing Engineering