Filtration failure occurs when filter media are blocked by accumulated solid particles. Suitable operating conditions were investigated for cake cleaning by partial oxidation of filter-cake particles (FCPs) during biomass gasification. The mechanism of the FCP partial oxidation was investigated in a ceramic filter and by using thermogravimetric analysis through a temperature-programmed route in a 2 vol % O₂–N₂ environment. Partial oxidation of the FCPs in the simulated product gas environment was examined at 300–600 °C in a ceramic filter that was set and heated in a laboratory-scale fixed reactor. Four reaction stages, namely, drying, preoxidation, complex oxidation, and nonoxidation, occurred in the FCP partial oxidation when the temperature increased from 30 to 800 °C in a 2 vol % O₂–N₂ environment. Partial oxidation was more effective for FCP mass loss from 275 to 725 °C. Experimental results obtained in a ceramic filter indicated that the best operating temperature and FCP loading occurred at 400 °C and 1.59 g/cm², respectively. The FCPs were characterized before and after partial oxidation by Fourier-transform infrared spectroscopy, scanning electron microscopy, and Brunaeur–Emmett–Teller analysis. Fourier-transform infrared spectroscopy analysis revealed that partial oxidation of the FCPs can result in a significant decrease in C–H_n (alkyl and aromatic) groups and an increase in C═O (carboxylic acids) groups. The scanning electron microscopy and Brunaeur–Emmett–Teller analyses suggest that, during partial oxidation, the FCPs underwent pore or pit formation, expansion, amalgamation, and destruction.

中文翻译：

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模拟产品气体环境中生物质气化过程中滤饼颗粒的部分氧化

当过滤介质被积聚的固体颗粒堵塞时，会发生过滤故障。研究了在生物质气化过程中通过部分氧化滤饼颗粒（FCP）来清洁滤饼的合适操作条件。在陶瓷过滤器中并通过热重分析，通过程序设定的温度在2 vol％O ₂ -N _2中进行热重分析，研究了FCP部分氧化的机理。环境。在300-600°C的陶瓷过滤器中检查了模拟产物气体环境中FCP的部分氧化，该陶瓷过滤器在实验室规模的固定反应器中进行了设置和加热。在2 vol％的O ₂ -N ₂环境中，当温度从30升高到800°C时，FCP部分氧化发生了四个反应阶段，即干燥，预氧化，复合氧化和非氧化。对于275至725°C的FCP质量损失，部分氧化更有效。在陶瓷过滤器中获得的实验结果表明，最佳工作温度和FCP负载发生在400°C和1.59 g / cm ^{2的情况下}， 分别。通过傅里叶变换红外光谱，扫描电子显微镜和Brunaeur-Emmett-Teller分析对FCP进行部分氧化前后的表征。傅里叶变换红外光谱分析表明，FCP的部分氧化可导致C–H _n（烷基和芳族）基团的大量减少和C═O（羧酸）基团的增加。扫描电子显微镜和Brunaeur-Emmett-Teller分析表明，在部分氧化过程中，FCP经历了孔或坑的形成，膨胀，合并和破坏。