In this paper the rotating packed bed, a new type of absorber, which has high mass-transfer characteristic by means of centrifugal field instead of gravity field, is used to study on stimulated flue gas desulfurizatio...In this paper the rotating packed bed, a new type of absorber, which has high mass-transfer characteristic by means of centrifugal field instead of gravity field, is used to study on stimulated flue gas desulfurization. Based on experimental data,a model of mass-transfer and reaction of the sulfur dioxide chemical absorption in the rotating packed bed reactor is proposed according to the film-theory. It can be used to predict the performance of the total absorption rate and the enhancement factor of the sulfur dioxide and oxygen simultaneous absorption in the rotating packed bed reactor.The prediction of the model is consistent with the experimental result varying operating conditions, and the relative error between experimental result and predicted result is below 12%. Some interesting potential projects of simultaneous absorption of sulfur dioxide and oxygen in the rotating packed bed reactor are also discussed.展开更多
碳纳米管(CNT)因其优异的物理性能被广泛认为是一种有效的挥发性有机化合物(VOCs)吸附剂。然而,由于团聚效应产生传质阻力,会影响CNT的吸附性能。微纤复合材料作为一种新型结构材料,有效克服了这一问题。文中采用化学气相沉积(CVD)法在...碳纳米管(CNT)因其优异的物理性能被广泛认为是一种有效的挥发性有机化合物(VOCs)吸附剂。然而,由于团聚效应产生传质阻力,会影响CNT的吸附性能。微纤复合材料作为一种新型结构材料,有效克服了这一问题。文中采用化学气相沉积(CVD)法在纸状烧结不锈钢纤维载体(PSSF)表面分别直接生长CNT和硫掺杂碳纳米管(SCNT),成功制备了具有梯度多孔结构的CNT/PSSF和SCNT/PSSF复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析技术(TG)、拉曼光谱(Raman)、傅里叶变换红外光谱仪(FT-IR)和X射线光电子能谱(XPS)对其进行系统表征。固定床反应器中的吸附实验结果表明,SCNT/PSSF因其表面丰富的缺陷和酸碱官能团,展现出优异的动态吸附性能。此外,通过构建由颗粒CNT和SCNT/PSSF组成的结构化固定床,研究了微纤复合材料在二甲苯吸附过程中的传质增强机理。与纯5 cm CNT结构床相比,4 cm CNT+1 cm SCNT/PSSF床层的利用率(ΔZ)提高了8.1%。结构化固定床的吸附过程可以被Yoon-Nelson模型良好拟合。展开更多
文摘In this paper the rotating packed bed, a new type of absorber, which has high mass-transfer characteristic by means of centrifugal field instead of gravity field, is used to study on stimulated flue gas desulfurization. Based on experimental data,a model of mass-transfer and reaction of the sulfur dioxide chemical absorption in the rotating packed bed reactor is proposed according to the film-theory. It can be used to predict the performance of the total absorption rate and the enhancement factor of the sulfur dioxide and oxygen simultaneous absorption in the rotating packed bed reactor.The prediction of the model is consistent with the experimental result varying operating conditions, and the relative error between experimental result and predicted result is below 12%. Some interesting potential projects of simultaneous absorption of sulfur dioxide and oxygen in the rotating packed bed reactor are also discussed.
文摘碳纳米管(CNT)因其优异的物理性能被广泛认为是一种有效的挥发性有机化合物(VOCs)吸附剂。然而,由于团聚效应产生传质阻力,会影响CNT的吸附性能。微纤复合材料作为一种新型结构材料,有效克服了这一问题。文中采用化学气相沉积(CVD)法在纸状烧结不锈钢纤维载体(PSSF)表面分别直接生长CNT和硫掺杂碳纳米管(SCNT),成功制备了具有梯度多孔结构的CNT/PSSF和SCNT/PSSF复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析技术(TG)、拉曼光谱(Raman)、傅里叶变换红外光谱仪(FT-IR)和X射线光电子能谱(XPS)对其进行系统表征。固定床反应器中的吸附实验结果表明,SCNT/PSSF因其表面丰富的缺陷和酸碱官能团,展现出优异的动态吸附性能。此外,通过构建由颗粒CNT和SCNT/PSSF组成的结构化固定床,研究了微纤复合材料在二甲苯吸附过程中的传质增强机理。与纯5 cm CNT结构床相比,4 cm CNT+1 cm SCNT/PSSF床层的利用率(ΔZ)提高了8.1%。结构化固定床的吸附过程可以被Yoon-Nelson模型良好拟合。
