2026-04-13T13:26:41Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4167082025-07-23T00:25:19Zcom_2072_1033col_2072_452951

Modeling and Experimental evaluation of syngas production from residual biomass Oriol Ybern, Berta Universidade de Lisboa Pérez González, Juan Jesús Àrees temàtiques de la UPC::Energies::Energia de la biomassa Biomass gasification syngas, gasification, agricultural waste, heating value, experiment, modeling Biomassa--Gasificació As global demand for energy grows and environmental concerns increase, renewable energy sources become crucial. Biomass, especially for producing biofuels such as synthesis gas via thermal gasification, has great potential. This thesis investigates the production of synthesis gas from agricultural residues, such as olive pomace, miscanthus and coffee husks, using experimental and modeling methods. Characterizations of the biomasses were carried out through proximate and ultimate analyses and thermogravimetric studies, and were in agreement with the literature, except for the volatile matter content of olive pomace. Synthesis gas production experiments were conducted with downdraft fixed bed and bubbling fluidized bed reactors in a pilot plant, operating at temperatures between 700-850°C with air as the gasification agent, showing varied results. Olive pomace showed promise for biofuels. Model simulations with ASPEN Plus® sought to reproduce the experimental results, but small variations occurred due to assumptions. Miscanthus stood out as the best feedstock in the model, differing from the experimental results due to errors in the proximal data used in ASPEN. Higher temperatures favored the production of H2 and CO2 to the detriment of CH4 and CO, contrary to expectations in the literature, possibly due to secondary reactions not taken into account. Optimal equivalence ratios between 0.2-0.25 were identified, with higher ratios reducing CO, H2 and CH4, and increasing CO2. Fixed bed gasifiers produced more H2 (13-15%), while fluidized bed gasifiers generated higher levels of CH4. Outgoing 2024-07 Master thesis https://hdl.handle.net/2117/416708 PRISMA-189646 eng Open Access application/pdf application/pdf Universitat Politècnica de Catalunya