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Title:Proizvodnja trdnih biogoriv s torefikacijo biomase
Authors:ID Potrč, Sanja (Author)
ID Goričanec, Darko (Mentor) More about this mentor... New window
ID Urbancl, Danijela (Comentor)
Files:.pdf MAG_Potrc_Sanja_2018.pdf (2,67 MB)
MD5: F865ADA8FA0866A9588463ADD1C0D6F5
PID: 20.500.12556/dkum/6bd69d4b-1e6a-411f-a27d-2593036357d1
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Torefikacija je blaga piroliza, ki se uporablja z namenom izboljšanja lastnosti biomase. Proizvodnja trdnih biogoriv s torefikacijo iz različnih virov biomase se je zaradi ekonomskih in tehnoloških zmožnosti izkazala kot zelo učinkovita alternativa premogu v industrijskih aplikacijah. Magistrsko delo prikazuje študijo torefikacijskega procesa, kjer smo odpadno biomaso pretvorili v trdno biogorivo z višjo kurilno vrednostjo in hidrofobnostjo. Material je med procesom izpostavljen inertni atmosferi oziroma atmosferi z zelo nizko koncentracijo kisika. Študija je bila narejena na treh različnih vrstah biomase, mešanem odpadnem lesu, hrastovem lesu in dehidriranem, granuliranem komunalnem mulju iz čistilne naprave. Vzorci so bili termično obdelani v temperaturnem območju od 220 °C do 400 °C, proces je potekal od 30 min do 120 min. Proizvedenim trdnim biogorivom smo izmerili vsebnost vlage, pepela, analitske vlage, hlapnih snovi in delež ogljika, vodika, dušika in žvepla. Določili smo izgubo mase, energijski izkoristek, masni izkoristek, faktor povečanja kurilne vrednosti, indeks stopnje torefikacije v smislu izgube mase, dosežene z zaostrovanjem pogojev torefikacije in delež dekarbonizacije ter dehidrogeniranja. Ugotovili smo, da je vpliv temperature večji od vpliva obratovalnega časa, s podaljšanjem trajanja in povišanjem temperature procesa kurilne vrednosti naraščajo, izguba mase se veča. Optimalna temperatura znaša 260 °C, pri tej temperaturi je najboljše razmerje med izboljšanjem kurilne vrednosti in dovedeno energijo. Nadalje smo pri optimalni temperaturi spreminjali čas procesa. Rezultati kažejo, da optimalni čas procesa znaša 1,2 h, do tega obratovalnega časa imamo pozitivno energetsko bilanco. Torefikacija odpadnega mešanega in hrastovega lesa se je izkazala za energetsko učinkovit proces.
Keywords:torefikacija, trdna biogoriva, biomasa, kurilna vrednost, energetska optimizacija
Place of publishing:Maribor
Publisher:[S. Potrč]
Year of publishing:2018
PID:20.500.12556/DKUM-72210 New window
UDC:604.4:662.6:579(043.2)
COBISS.SI-ID:21925654 New window
NUK URN:URN:SI:UM:DK:4GWB4FCO
Publication date in DKUM:05.10.2018
Views:1747
Downloads:322
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
POTRČ, Sanja, 2018, Proizvodnja trdnih biogoriv s torefikacijo biomase [online]. Master’s thesis. Maribor : S. Potrč. [Accessed 14 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=72210
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.09.2018

Secondary language

Language:English
Title:Production of solid biofuels with torrefaction of biomass
Abstract:Solid fuel production from different biomass sources become a very challenging area. The paper presents the torrefaction process, mild pyrolysis, where biomass material is converted into solid biofuel with higher heating value. The material is processed in inert atmosphere or in the atmosphere with very low oxygen concertation. The study was done for three varied materials, oak wood, mixed wood and dehydrated, granulated sewage sludge. Biomass wastes have been torrefied at a temperature range of 220-400°C for 30-120 min to produce biochars. The properties of torrefied biomass such as the mass drop, energy yield, mass yield, enhancement factor of higher heating value, torrefaction severity index, decarbonization and dehydrogenation have been investigated. The influence of the temperature was analysed and the optimal temperature of 260°C for exact samples were determined. Furthermore, the optimal operation time for each material was evaluated. The experiments were done without flue gases integration. The results show that from energy point of view the optimal operation time for oak and mixed wood is around 1.2 h at 260°C. The torrefaction of sewage sludge is energetically unjustified.
Keywords:solid biofuel, torrefaction, biomass wastes, heating value, energetic optimisation


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