Release Pattern of Light Aromatic Hydrocarbons during the Biomass Roasting Process

Release Pattern of Light Aromatic Hydrocarbons during the Biomass Roasting Process

7 March 2024 | Yaying Zhao, Yuqing Yan, Yuhang Jiang, Yang Cao, Zhuozhi Wang, Jiapeng Li, Chenshuai Yan, Danya Wang, Lu Yuan, Guangbo Zhao
The article discusses the release patterns of light aromatic hydrocarbons during the biomass roasting process, emphasizing the importance of optimizing reaction conditions such as temperature, catalysts, and atmosphere to enhance the production of these valuable compounds. Roasting is a critical step in biomass upgrading, improving fuel quality by reducing oxygen and hydrogen content ratios and producing biomass with characteristics similar to lignite. At temperatures between 200–300 °C, cellulose and hemicellulose undergo depolymerization, releasing monocyclic aromatic hydrocarbons. These hydrocarbons can be effectively controlled by adjusting reaction parameters like temperature, residence time, catalysts, and atmosphere. The study reviews how different roasting conditions affect the release of monocyclic aromatic hydrocarbons and highlights the synergistic effects of temperature, time, atmosphere, and catalysts in optimizing their production. The roasting process also enhances biomass fuel quality by increasing energy density, hydrophobicity, and reducing moisture retention. The effect of roasting atmosphere is significant, with inert atmospheres generally improving combustion characteristics. Different roasting methods, such as microwave, wet, and pressurized roasting, influence biomass fuel quality, with pressurized roasting showing higher efficiency in dehydration and decarboxylation. The optimal roasting temperature for biomass is around 200–300 °C, where biomass undergoes significant decomposition without excessive pyrolysis. Catalysts like ZSM-5 and metal-modified ZSM-5 play a crucial role in enhancing the deoxygenation and aromatization of biomass-derived intermediates, increasing the yield of aromatic hydrocarbons. The study also highlights the importance of catalysts in improving bio-oil quality and reducing carbon deposition. The application of biomass-derived aromatics in conjunction with lignite can enhance fuel quality and reduce moisture reabsorption, improving the efficiency of lignite utilization. Overall, optimizing roasting conditions and using appropriate catalysts is essential for maximizing the production of light aromatic hydrocarbons from biomass, contributing to sustainable energy solutions.The article discusses the release patterns of light aromatic hydrocarbons during the biomass roasting process, emphasizing the importance of optimizing reaction conditions such as temperature, catalysts, and atmosphere to enhance the production of these valuable compounds. Roasting is a critical step in biomass upgrading, improving fuel quality by reducing oxygen and hydrogen content ratios and producing biomass with characteristics similar to lignite. At temperatures between 200–300 °C, cellulose and hemicellulose undergo depolymerization, releasing monocyclic aromatic hydrocarbons. These hydrocarbons can be effectively controlled by adjusting reaction parameters like temperature, residence time, catalysts, and atmosphere. The study reviews how different roasting conditions affect the release of monocyclic aromatic hydrocarbons and highlights the synergistic effects of temperature, time, atmosphere, and catalysts in optimizing their production. The roasting process also enhances biomass fuel quality by increasing energy density, hydrophobicity, and reducing moisture retention. The effect of roasting atmosphere is significant, with inert atmospheres generally improving combustion characteristics. Different roasting methods, such as microwave, wet, and pressurized roasting, influence biomass fuel quality, with pressurized roasting showing higher efficiency in dehydration and decarboxylation. The optimal roasting temperature for biomass is around 200–300 °C, where biomass undergoes significant decomposition without excessive pyrolysis. Catalysts like ZSM-5 and metal-modified ZSM-5 play a crucial role in enhancing the deoxygenation and aromatization of biomass-derived intermediates, increasing the yield of aromatic hydrocarbons. The study also highlights the importance of catalysts in improving bio-oil quality and reducing carbon deposition. The application of biomass-derived aromatics in conjunction with lignite can enhance fuel quality and reduce moisture reabsorption, improving the efficiency of lignite utilization. Overall, optimizing roasting conditions and using appropriate catalysts is essential for maximizing the production of light aromatic hydrocarbons from biomass, contributing to sustainable energy solutions.
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