Search results for "kaasutus"
showing 9 items of 9 documents
Characterisation and treatment of waste incineration bottom ash and leachate
2012
Three zone modeling of downdraft biomass gasification : equilibrium and finite kinetic approach
2013
Mathematical models and simulations are being practiced exceedingly in the field of research and development work. Simulations provide a less expensive means of evaluating the benefits and associated risk with applied field. Gasification is a complex mechanism, which incorporates thermochemical conversion of carbon based feedstock. Therefore, simulation of gasification provides a better comprehension of physical and chemical mechanism inside the gasifier than general conjecture and assist in optimizing the yield. The main objectives of present thesis work involve formulation of separate sub-model for pyrolysis and oxidation zone from published scientific references, and assembling it with p…
Förgasning av biomassa till värme, elektricitet och biobränslen : publikation för HighBio-projektet
2011
Effect of Tire-Char Ash on the Extent of Synergy during CO2 Cogasification with Hydrochar from Potassium-Rich Coconut Fiber
2020
The influence of inherent tire char ash during co-gasification with coconut hydrochar prepared at different intensities was investigated by thermogravimetric analysis to ascertain the extent to which synergistic interaction, reactivity, and activation energy reduction were altered. High-ash tire tread (TT) and low-ash sidewall (SW) both exhibited enhanced synergy, reactivity, and activation reduction upon co-gasification with hydrochars; however, the extent of promotion was more pronounced in SW-hydrochar blends. This difference was caused by the inhibiting nature of TT inherent ash, particularly the role of Si-containing compounds. Inhibition in TT-hydrochar blends was mainly due to the pr…
Biomass gasification to heat, electricity and biofuels : HighBio project publication
2011
Biomassan kaasutus sähköksi, lämmöksi ja biopolttoaineiksi : HighBio-projektijulkaisu
2011
Selvitys kierrätyspolttoainejakeiden ominaisuuksista ja soveltuvuudesta kaasutus-CHP-laitoksen polttoaineeksi
2011
Työn tarkoituksena oli selvittää kirjallisuudesta eri kierrätyspolttoainejakeiden kemialliset koostumukset ja jakeiden sopivuus Lahti Energian (LE) uuden kaasutus-CHP-laitoksen polttoaineeksi. Tarkasteltaviksi jakeiksi valikoituivat aiemman kokemuksen perusteella tärkeiksi osoittautuneet kaupan ja teollisuuden jäte, rakennus- ja puujäte, kotitalousjäte sekä mahdollisena tulevaisuuden polttoaineena elektroniikkajäte. Koostumusselvitykset on suoritettu alkuainetasolla. Jakeiden alkuainepitoisuuksia verrattaessa, havaittiin niiden välillä selviä eroja. Matalimmat haittaainepitoisuudet ja suppein vaihtelu oli rakennus- ja puujätteellä. Heikkolaatuisinta polttoainetta muun muassa useiden raskasm…
Biomass to energy and chemicals : HighBio2 project publication
2013
Modeling biomass char gasification kinetics for improving prediction of carbon conversion in a fluidized bed gasifier
2014
Gasification of biomass in a fluidized bed (FB) was modeled based on kinetic data obtained from previously conducted thermo- gravimetic analysis. The thermogravimetric analysis experiments were designed to closely resemble conditions in a real FB gasifier by using high sample heating rates, in situ devolatilization and gas atmospheres of H 2 O / H 2 and CO 2 / CO mixtures. Several char kinetic models were evaluated based on their ability to predict char conversion based on the thermogravimetric data. A modified version of the random pore model was shown to provide good fitting of the char reactivity and suitability for use in a reactor model. An updated FB reactor model which incorporates t…