Abstract
Plasma-catalytic reforming of simulated biomass tar composed of naphthalene, toluene, and benzene was carried out in a coaxial plasma reactor supplied with nanosecond high-voltage pulses. The effect of Rh-LaCoO3/Al2O3 and Ni/Al2O3 catalysts covering high-voltage electrode on the tar conversion efficiency was evaluated. Compared to the plasma reaction without a catalyst, the combination of plasma with the catalyst significantly enhanced the conversion of all three tar components, achieving complete conversion when an Rh-based catalyst was used. Apart from gaseous and liquid samples, char samples taken at five locations inside the reactor were also analyzed for their chemical composition. Char was not formed when the Rh-based catalyst was used. Different by-products were detected for the plasma reactor without a catalyst, with the Ni- and Rh-based catalysts. A possible reaction pathway in the plasma-catalytic process for naphthalene, as the most complex compound, was proposed through the combined analysis of liquid and solid products.
Highlights
Tars formed during biomass gasification are an important problem for installations located downstream of the gasification reactor
A dielectric barrier discharge (DBD) reactor combined with catalytic materials was used
A dielectric barrier discharge (DBD) reactor combined with catalytic materials was 2 ofthe are considered to be very attractive for heavy hydrocarbon cracking due to high electron density and energy, plasma homogeneity, simple design and operation, capacity to induce reactions at relatively ambient temperature, atmospheric operational pressure, and very low electron density and energy, plasma homogeneity, simple design and operation, capacity to induce level of coke production [20]
Summary
Tars formed during biomass gasification are an important problem for installations located downstream of the gasification reactor. A dielectric barrier discharge (DBD) reactor combined with catalytic materials was 2 ofthe are considered to be very attractive for heavy hydrocarbon cracking due to high electron density and energy, plasma homogeneity, simple design and operation, capacity to induce reactions at relatively ambient temperature, atmospheric operational pressure, and very low electron density and energy, plasma homogeneity, simple design and operation, capacity to induce level of coke production [20]. Nanosecond high-voltage pulses—investigations have shown electrons, that shortening high-voltage pulse molecules at the same input power [36] Such short pulses were used for tar removal only by leads to increasing the formation of highly energetic electrons, ions, radicals and exited molecules researchers from.
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