Searched for: author%3A%22Tsekos%2C+C.%22
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Tsekos, C. (author)
The modern world is faced with a multitude of environmental and socio-economic issues, stemming from the way that energy is used and converted. Climate change due to anthropogenic activities (use of fossil fuel resources and its associated CO2 equivalent emissions), has greatly affected humankind and nature in general, by leading to extreme...
doctoral thesis 2024
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Tsekos, C. (author), de Voogt, D. (author), de Jong, W. (author), Padding, J.T. (author)
This work focuses on the numerical modelling and experimental validation of the hydrodynamic behaviour of a novel 50 kW<sub>th</sub> indirectly heated bubbling fluidized bed steam reformer. The hydrodynamic behaviour of fluidized beds with immersed vertical tubes and complex fluidized bed geometries in general have not been thoroughly...
journal article 2022
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Del Grosso, M. (author), Cutz, L. (author), Tiringer, U. (author), Tsekos, C. (author), Taheri, P. (author), de Jong, W. (author)
Our work provides a thorough characterization of different biochars produced by a novel 50 kW<sub>th</sub> Indirectly Heated Bubbling Fluidized Bed Steam Reformer. This study investigates the effect of temperature and gasification agent on the physico-chemical properties of biochars. We combined macro, micro and nano characterization...
journal article 2022
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Tsekos, C. (author), Del Grosso, M. (author), de Jong, W. (author)
Within this work, a novel 50 kW<sub>th</sub> indirectly heated bubbling fluidized bed steam reformer (IHBFBSR) is presented, along with its commissioning experiments. In the IHBFBSR, heat is provided through two radiant tube natural gas burners in the bed and the freeboard area. The aim of this innovative design is sufficient heat provision...
journal article 2021
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Tsekos, C. (author), Tandurella, S. (author), de Jong, W. (author)
As the push towards more sustainable ways to produce energy and chemicals intensifies, efforts are needed to refine and optimize the systems that can give an answer to these needs. In the present work, the use of neural networks as modelling tools for lignocellulosic biomass pyrolysis main products yields estimation was evaluated. In order to...
journal article 2021
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Del Grosso, M. (author), Sridharan, Balaji (author), Tsekos, C. (author), Klein, S.A. (author), de Jong, W. (author)
This work is focused on the process system modelling of an indirectly heated gasifier (10 MW<sub>th</sub>) using torrefied wood as feedstock and its integration with methanol and power production using Aspen Plus®. The modelling of the gasification process along with the obtained reaction kinetics were validated with experimental data found...
journal article 2020
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Tsekos, C. (author), Anastasakis, K. (author), Schoenmakers, P.L. (author), de Jong, W. (author)
The present work focuses on the sampling procedure and quantification of the PAH yield from the fast pyrolysis of waste softwood. In particular, fast pyrolysis experiments were conducted using a CDS Pyroprobe 5200 at temperatures between 500 °C and 1000 °C, at a heating rate of 600 °C/s for a sample size of 30 mg. High performance liquid...
journal article 2020
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Anca-Couce, Andrés (author), Tsekos, C. (author), Retschitzegger, Stefan (author), Zimbardi, Francesco (author), Funke, Axel (author), Banks, Scott (author), Kraia, Tzouliana (author), Marques, Paula (author), Scharler, Robert (author), de Jong, W. (author), Kienzl, Norbert (author)
The large variations found in literature for the activation energy values of main biomass compounds (cellulose, hemicellulose and lignin) in pyrolysis TGA raise concerns regarding the reliability of both the experimental and the modelling side of the performed works. In this work, an international round robin has been conducted by 7 partners...
journal article 2020
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Simbolon, L.M. (author), Pandey, D. S. (author), Tsekos, C. (author), de Jong, W. (author), Tassou, S. A. (author)
The present study explored a thermochemical treatment method as an alternative approach to process animal feedlot (poultry litter). Fast pyrolysis of poultry litter experiments was conducted using a Pyroprobe 5200 reactor in the temperature range of 400-600 °C. The influence of reactor temperature on the yield of pyrolytic gases, condensate ...
conference paper 2019
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Poomsawat, W. (author), Tsalidis, G.A. (author), Tsekos, C. (author), de Jong, W. (author)
Furfural is a very promising product of lignocellulosic biomass-based biorefineries and has the potential to become a useful resource for further conversion and utilization. Aquatic plants show an enormous potential as feedstock since they do not compete for land use, and they require minimal water consumption in a biorefinery concept due to...
journal article 2019
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Tsalidis, G.A. (author), Tsekos, C. (author), Anastasakis, K. (author), de Jong, W. (author)
In this study torrefied feedstocks, consisting of mixed wood and wood residues torrefied at 300 °C and ash wood torrefied at 250 and 265 °C, were pyrolyzed in a pyroprobe at five pyrolysis temperatures (600–1000 °C) and a fast heating rate (600 °C·s−1) to investigate the effect of torrefaction on the formation of volatiles and their evolution in...
journal article 2018
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Del Grosso, M. (author), Tsekos, C. (author), de Jong, W. (author)
abstract 2018
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Tsekos, C. (author)
The future depletion of conventional fossil fuel reserves, the ever increasing need for energy self – reliance and the global concern around environmental change caused by their use, have made heat and power generation from alternative and sustainable sources a primary research focus worldwide. Biomass is such a source, constituting a clean and...
master thesis 2016
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Christodoulou, C. (author), Tsekos, C. (author), Tsalidis, G.A. (author), Fantini, M. (author), Panopoulos, K.D. (author), De Jong, W. (author), Kakaras, E. (author)
Few tests have been carried out in order to evaluate the use of cardoon in gasification and combustion applications most of the researchers dealt with agglomeration problems. The aim of this work is to deal with the agglomeration problem and to present a solution for the utilization of this biofuel at a near industrial application scale. For...
journal article 2014
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