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1 材料与方法
1.1 实验材料
1.1.1 仪器与设备
1.1.2 实验物质与试剂
1.1.3 CeO2-CuO/粉煤灰的制备过程
1.1.4 仪器设置条件和测试过程
1.2 实验装置与方法
η=λ0−λλ0×100%
| (1) |
Fig. 1 Absorption experimental system

2 结果与讨论
2.1 粉煤灰和CeO2-CuO/粉煤灰吸附SO2/NO性能比较
Fig. 2 Comparison of adsorption efficiency

Fig. 3 Breakthrough curves of SO2/NO under different adsorbents

Table 1 BET and structural properties and total capacity of SO2/NO under different adsorbents
样品 | 比表面积/(m2·g−1 ) | 孔体积/(cm3·g−1) | 孔径/nm | SO2饱和吸附量/(mg·g−1) | NO饱和吸附量/(mg·g−1) |
FA | 112 | 0.30 | 13.8 | 2.57 | 1.07 |
CeO2-CuO/FA | 167 | 0.67 | 10.1 | 6.29 | 1.47 |
2.2 粉煤灰和CeO2-CuO/粉煤灰的表征测试
2.2.1 X射线荧光光谱(XRF)
Table 2 Chemical composition of fly ash(mass fraction) %
SiO2 | Al2O3 | CaO | Fe2O3 | TiO2 | K2O | MgO | P2O5 | Na2O |
54.086 | 36.139 | 2.745 | 2.675 | 1.429 | 0.708 | 0.531 | 0.388 | 0.365 |
Table 3 Chemical composition of CeO2-CuO/fly ash adsorbent(mass fraction) %
SiO2 | Al2O3 | CaO | Fe2O3 | CuO | TiO2 | CeO2 | K2O | Na2O |
52.699 | 34.892 | 2.560 | 2.427 | 1.649 | 1.450 | 0.781 | 0.711 | 0.702 |
2.2.2 X-射线粉末衍射(XRD)
Fig. 4 X-ray diffraction pattern of CeO2-CuO/fly ash adsorbent

2.2.3 扫描电镜(SEM)
Fig. 5 SEM photographs of fly ash

Fig. 6 SEM photographs of CeO2-CuO/fly ash adsorbent

2.2.4 BET分析
2.2.5 红外光谱(FTIR)
Fig. 7 FTIR spectrum of fly ash(FA) and CeO2-CuO/fly ash adsorbent
Fig. 7 FTIR spectrum of fly ash(FA) and CeO2-CuO/fly ash adsorbent

2.3 CeO2-CuO/粉煤灰对SO2/NO吸附反应条件的优化
Fig. 8 Effect of reaction conditions

Fig. 9 Effect of reaction conditions

2.4 CeO2-CuO/粉煤灰对SO2/NO共吸附反应实验
Fig. 10 Effect of different conditions on adsorption performance of CeO2-CuO/FA
Fig. 10 Effect of different conditions on adsorption performance of CeO2-CuO/FA

2.5 原位红外透射光谱分析
2.5.1 SO2原位红外光谱
Fig. 11 In situ FT-IR spectra of fly ash and CeO2-CuO/fly ash reation with SO2
Fig. 11 In situ FT-IR spectra of fly ash and CeO2-CuO/fly ash reation with SO2

2.5.2 NO原位红外光谱
Fig. 12 In situ FT-IR spectra of fly ash and CeO2-CuO/fly ash reation with NO
Fig. 12 In situ FT-IR spectra of fly ash and CeO2-CuO/fly ash reation with NO
