Publicação
Bragança September, 2025 Modelling and simulation of biomass pyrolysis processes
| Resumo: | The global energy demand has been increasing exponentially, and conventional methods of energy generation, primarily based on fossil fuels and other non-renewable sources, have significant environmental drawbacks due to their high CO2 emissions. In contrast, biomass presents a viable renewable alternative, offering the advantage of minimal emissions, thereby mitigating the impact of climate change. This dissertation investigates the pyrolysis of grape pomace (GP) and olive pomace (OP) under various operating conditions. It develops kinetic and thermodynamic models, which are merged with UniSim Design simulations. . At a feed rate of 100 kg/h and 600 °C, GP (42.4% lignin) yielded 34.0 kg/h biochar, 24.6 kg/h bio-oil, and 41.6 kg/h syngas, while OP (27.5% lignin) produced 26.0 kg/h biochar, 28.4 kg/h bio-oil, and 45.6 kg/h syngas. Sensitivity analysis revealed that lowering pyrolysis temperature from 600 °C to 400 °C increased biochar yield by ~30%, but reduced syngas generation by ~25%. Polynomial modelling confirmed a non-linear decrease in char yield with rising temperature, while kinetic modelling captured the dominant role of tar formation (55% yield, 112.7 kJ/mol activation energy) compared to gas (10%, 98.3 kJ/mol) and char (35%, 106.5 kJ/mol). The results show the potential of grape and olive pomace as feedstocks for targeted product recovery. OP is better for obtaining gas and liquid products, while GP is more suitable for carbon sequestration through char. The study also confirms that UniSim Design is an effective tool for simulating biomass pyrolysis and guiding process optimization. |
|---|---|
| Autores principais: | Novruzlu, Aysel Rafiq Qizi |
| Assunto: | Biomass Pyrolysis Simulation Grape pomace Olive pomace UniSim design software |
| Ano: | 2026 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Politécnica de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital da UPB |
| Resumo: | The global energy demand has been increasing exponentially, and conventional methods of energy generation, primarily based on fossil fuels and other non-renewable sources, have significant environmental drawbacks due to their high CO2 emissions. In contrast, biomass presents a viable renewable alternative, offering the advantage of minimal emissions, thereby mitigating the impact of climate change. This dissertation investigates the pyrolysis of grape pomace (GP) and olive pomace (OP) under various operating conditions. It develops kinetic and thermodynamic models, which are merged with UniSim Design simulations. . At a feed rate of 100 kg/h and 600 °C, GP (42.4% lignin) yielded 34.0 kg/h biochar, 24.6 kg/h bio-oil, and 41.6 kg/h syngas, while OP (27.5% lignin) produced 26.0 kg/h biochar, 28.4 kg/h bio-oil, and 45.6 kg/h syngas. Sensitivity analysis revealed that lowering pyrolysis temperature from 600 °C to 400 °C increased biochar yield by ~30%, but reduced syngas generation by ~25%. Polynomial modelling confirmed a non-linear decrease in char yield with rising temperature, while kinetic modelling captured the dominant role of tar formation (55% yield, 112.7 kJ/mol activation energy) compared to gas (10%, 98.3 kJ/mol) and char (35%, 106.5 kJ/mol). The results show the potential of grape and olive pomace as feedstocks for targeted product recovery. OP is better for obtaining gas and liquid products, while GP is more suitable for carbon sequestration through char. The study also confirms that UniSim Design is an effective tool for simulating biomass pyrolysis and guiding process optimization. |
|---|
Atividades financiadas
Não foram encontrados projetos financiados.