Modeliranje uplinjanja biomase s simulacijskim okoljem COCO

Todorovski, Filip (author), Sekavčnik, Mihael (mentor), Senegačnik, Andrej (comentor)

Biomasa je obnovljiv vir energije in predstavlja učinkovito in trajnostno alternativo fosilnim gorivom. Poleg zmanjšanja ogljičnega odtisa omogoča tudi čiščenje tal v onesnaženih predelih z absorpcijo težkih kovin. V magistrski nalogi je bil narejen kinetični model procesa uplinjanja biooglja, pridobljenega iz procesa pirolize borovega lesa z uporabo programskega okolja COCO. Analiza sestave sinteznega plina kot produkta uplinjanja je bila narejena v temperaturnem območju 650 °C–1400 °C, velikosti volumna reaktorja 0,5 m3–75 m3 ter razmerju med paro in ogljem 0,1–4,5. Primerjava rezultatov modela in eksperimentalnih rezultatov dostopnih v literaturi je pokazala dobro ujemanje. Ugotovili smo, da se pri temperaturah nad 1100 ? (odvisno od volumna reaktorja) v sinteznem plinu zmanjša delež vodika zaradi ravnotežne narave reakcije parnega reformiranja. Na sestavo sinteznega plina prav tako močno vpliva razmerje med vodno paro in bioogljem. S povečanjem deleža vodne pare se povečuje delež vodika, medtem ko se deleža CO in CH4 zmanjšujeta, s čimer se poveča učinkovitost konverzije biooglja v sintezni plin z večjo vsebnostjo vodika.

• Language: Slovenian
• Keywords: uplinjanje, biomasa, biooglje, sintezni plin, simulacijsko okolje COCO, kinetični model, histrost reakcije, piroliza, zgorevanje
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [F. Todorovski]
• Year: 2022
• Number of pages: XXII, 55 str.
• PID: 20.500.12556/RUL-137709
• UDC: 004.942:662.63:620.92(043.2)
• COBISS.SI-ID: 114846211
• Publication date in RUL: 29.06.2022

TODOROVSKI, Filip, 2022, Modeliranje uplinjanja biomase s simulacijskim okoljem COCO [online]. Master’s thesis. Ljubljana : F. Todorovski. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=137709

Secondary language

• Language: English
• Title: Modeling biomass gasification with COCO simulator

Abstract

Biomass is a renewable energy source and represents an efficient and sustainable alternative to fossil fuels. In addition to reducing the carbon footprint, it also has a potential to clean the soil in contaminated areas by absorbing heavy metals. In the master's thesis, a kinetic model of the process of gasification of biochar obtained from the process of pyrolysis of pine wood using the COCO software environment was made. The analysis of the composition of the syngas as a gasification product was performed in the temperature range 650 °C – 1400 °C, the reactor volume size 0.5 m3 – 75 m3 and the steam to carbon ratio 0.1 – 4.5. A comparison of the model results and the experimental results available in the literature showed a good agreement. We found that at temperature above 1100 ␃ (depending on reactor volume) the hydrogen fraction in the syngas decreases due to the equilibrium nature of the steam reforming reaction. The composition of the syngas is also strongly influenced by the ratio of steam to biochar. As the steam fraction increases, the hydrogen fraction increases, while the CO and CH4 fraction decreases, thus increasing the efficiency of conversion of biochar to syngas with higher hydrogen content.

• Keywords: gasification, biomass, biochar, syngas, COCO simulator, kinetic model, reaction rate, pyrolysis, combustion