Search results for " Syngas"
showing 4 items of 4 documents
Supercritical water gasification of waste oils as a source of syngas
2021
A huge amount of waste oil is produced worldwide. Also substantial amount of virgin oils is available that are interesting candidates for upgrading into syngas. Supercritical water gasification (SCWG) can be considered as an aqueous phase reforming process to produce syngas from oils. In this work, a variety of waste and virgin oils were gasified in a continuous down-flow autoclave reactor at supercritical conditions. Experiments were carried out at 430 °C and 660 °C, 25 MPa, with a residence time in the range 103-170 s, in order to investigate gasification and carbon efficiency, hydrogen yield and composition of the produced gas. All the analysed feedstocks were suspended in water at vario…
Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification
2017
This paper discusses the characteristics of Birchwood gasification using the simulated results of a Computational Fluid Dynamics (CFD) model. The CFD model is developed and validated with the experimental results obtained with the fixed bed downdraft gasifier available at the University of Agder (UIA), Norway. In this work, several parameters are examined and given importance, such as producer gas yield, syngas composition, lower heating value (LHV), and cold gas efficiency (CGE) of the syngas. The behavior of the parameters mentioned above is examined by varying the biomass particle size. The diameters of the two biomass particles are 11.5 mm and 9.18 mm. All the parameters investigate wit…
Experimental study of the pyrolysis of waste bitumen for oil production
2020
Abstract This work focuses on bitumen slow pyrolysis. Mass and energy yields of oil, solid and gas were obtained from pyrolysis experiments using a semi-batch reactor in a nitrogen atmosphere, under three non-isothermal conditions (maximum temperature: 450 °C, 500 °C and 550 °C). The effect of temperature on the product yields was discussed. The gas compositions were analysed using gas chromatography (GC) and the heating value of oil and solid residue was also measured. Using a thermo-gravimetric analyser, kinetic parameters were evaluated through Ozawa-Flynn-Wall (OFW) method. Results showed that oil yield is maximum at 500 °C (50%). Moreover, gas yield increased with increasing pyrolysis …
Analisi di inventario di un sistema di valorizzazione energetica di biomasse residuali di origine forestale in un’ottica di ciclo di vita
2021
Il presente lavoro descrive i risultati dell’analisi di inventario di un impianto integrato “gassificatore – cogeneratore” impiegato per la valorizzazione energetica di biomasse residuali di origine forestale, in un’ottica di ciclo di vita. Il sistema gassificatore – cogeneratore è un prototipo realizzato presso il laboratorio di Bioenergia e Biocombustibili dell’Università di Bolzano. L’impianto è costituito da un gassificatore down-draft e un cogeneratore con motore diesel dual – fuel e una potenza elettrica di 3 kW. L’analisi di inventario è stata sviluppata in accordo agli standard della serie ISO 14040. L’unità funzionale (UF) è 1 kWh di energia elettrica immessa in rete. I confini del…