Amrullah Apip, Farobie Obie
Department of Mechanical Engineering, Lambung Mangkurat University, Banjarmasin, South Kalimantan, Indonesia.
Division for Biomass and Energy, Wetland-Based Material (WBM) Research Center, Lambung Mangkurat University, Banjarmasin, South Kalimantan, Indonesia.
Heliyon. 2023 Jul 17;9(7):e18350. doi: 10.1016/j.heliyon.2023.e18350. eCollection 2023 Jul.
Non-catalytic pyrolysis of brown macroalgae (Padina sp.) was studied in a batch reactor at temperature ranges of 400-600 °C and 10-90 min reaction times on the product distribution and conversion rate behavior. The highest pyro-oil and pyro-gas yields were obtained at 600 °C, which reached 67 wt% and 27 wt%, respectively, when the reaction times were prolonged (30-90 min). In addition, the high reaction temperature resulted in more generations of heavy tar and a considerable enhancement in aromatization degree. N-aromatic groups and phenol were observed from pyro-oil at 500 °C and 600 °C, respectively. Tar yield increased with reaction temperature, reflecting an order of reaction greater than one for tar production. The rate constant of tar formation was found to be 0.0013/s at 400 °C; 0.0023/s at 500 °C; and 0.0033/s at 600 °C, respectively, with the reaction order being higher than one (1.25). These findings highlighted that the proposed model could be used to accurately predict the pyrolysis process's behavior.
在间歇式反应器中，研究了棕色大型海藻（Padina sp.）在400 - 600°C温度范围和10 - 90分钟反应时间下的非催化热解过程，考察了其对产物分布和转化率行为的影响。在600°C时获得了最高的热解油和热解气产率，当反应时间延长（30 - 90分钟）时，热解油产率达到67 wt%，热解气产率达到27 wt%。此外，较高的反应温度导致更多重质焦油生成，且芳构化程度显著提高。分别在500°C和600°C的热解油中观察到了N - 芳基基团和苯酚。焦油产率随反应温度升高而增加，这表明焦油生成反应的反应级数大于1。发现焦油生成的速率常数在400°C时为0.0013/s；在500°C时为0.0023/s；在600°C时为0.0033/s，反应级数高于1（1.25）。这些发现突出表明所提出的模型可用于准确预测热解过程的行为。
