Experimental investigations on plasma-assisted wood pellet ignition for the start-up of biomass-fired power stations

Youssefi, Reyhane; Maier, J.; Scheffknecht, Günter

doi:10.1016/j.rser.2020.110522

Cited by 9 publications

(2 citation statements)

References 7 publications

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“…A 400 kW combustion test facility was used for the investigation of plasma-assisted ignition technology under cold start-up conditions. The test facility and the swirl burner are described and illustrated elsewhere [24]. The 7 m reactor consisted of 6 segments and was cooled by a water jacket, where the first three segments and the top plate of the reactor were covered with a refractory lining.…”

Section: Experimental Facilitymentioning

confidence: 99%

Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels

2021

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The need for flexible power generation is growing worldwide as the energy transition is altering the operational regimes of thermal power plants. Plasma ignition systems, as an alternative technology to the conventional start-up method with natural gas or oil firing, offer a cost- and energy-efficient start-up process in pulverized fuel power stations. The application of plasma ignition systems for cold start-ups using different qualities of pre-dried lignite is investigated in a pilot-scale combustion facility. A plasma integrated swirl burner is developed and validated using highly ignitable lignite dust. Eight pre-dried lignite qualities with a moisture content of up to 30% and a broad particle size distribution are investigated for this application to determine the applicability and limitations of the plasma ignition system with regard to the fuel quality. The performance of lignites for cold start-up in the plasma ignition system are categorized based on their ignition and combustion performance. All lignite qualities were ignited under the cold-start-up condition with a plasma power of 4 kW to 7 kW. Lignite qualities with a moisture content of up to 20% and a median particle size of below 450 μm form a self-sustained flame with short-time plasma-supported combustion, while flame blow-out is observed for lignites with lower qualities.

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Section: Experimental Facilitymentioning

confidence: 99%

Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels

2021

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“…One path to improve the surface properties of wood is through modification techniques. Among various emerging surface modification techniques, plasma treatment has been extensively used during the recent decade [ 4 , 14 , 15 , 16 ]. It is a dry and clean process with minor environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Application of Waterborne Acrylic and Solvent-Borne Polyester Coatings on Plasma-Treated Fir (Abies alba M.) Wood

2022

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This research investigates the effect of plasma treatment with air, nitrogen (N2), and carbon dioxide (CO2) gases on the performance of waterborne (acrylic) and solvent-borne (polyester) coated fir (Abies alba M.) wood samples. The properties of the plasma-coated samples were analyzed before and after exposure to accelerated weathering and compared with those of untreated and solely treated ones. According to pull-off testing, the coating adhesion of the wood samples was considerably improved by plasma treatment, and obvious differences were observed between different plasma gases. The effect was more pronounced after the weathering test. Similar results were obtained for the abrasion resistance of the samples. The water contact angle measurement illustrated more hydrophilic character in the solely plasma-treated wood in comparison with the untreated wood. The application of coatings, however, strongly improved its hydrophobic character. The performances of waterborne and solvent-borne coatings on plasma-treated wood were comparable, although slightly better values were obtained by the waterborne system. Our results exhibit the positive effect of plasma treatment on coating performances and the increased weather resistance of the waterborne and solvent-borne coating systems on plasma-treated wood.

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