CAJ | 학술논문

以硫酸亚铁热解产生的铁基硫酸盐催化剂的选择性催化还原反应活性为对象，研究了300-500℃范围内S02对于该催化剂催化性能的影响。通过固定床实验，原位红外漫反射测试NH，吸附实验测试了催化剂的脱硝活性、选择性及NH3的吸附情况。实验结果表明：S02促进了铁基硫酸盐催化剂的选择性催化还原反应活性，提高了NH，的选择性。原位红外光谱实验进一步证实SO2的吸附增强了催化剂表面的BrФbnsted酸性位，促进了NH3的吸附，有利于NH3与NO的反应，从而体现出较强的脱硝活性。考虑到脱硝活性以及NH3选择性的情况，选取350℃为主要反应温度比较合适。
이류산아철열해산생적철기류산염최화제적선택성최화환원반응활성위대상，연구료300-500℃범위내S02대우해최화제최화성능적영향。통과고정상실험，원위홍외만반사측시NH，흡부실험측시료최화제적탈초활성、선택성급NH3적흡부정황。실험결과표명：S02촉진료철기류산염최화제적선택성최화환원반응활성，제고료NH，적선택성。원위홍외광보실험진일보증실SO2적흡부증강료최화제표면적BrФbnsted산성위，촉진료NH3적흡부，유리우NH3여NO적반응，종이체현출교강적탈초활성。고필도탈초활성이급NH3선택성적정황，선취350℃위주요반응온도비교합괄。
The effect of SO2 on the catalytic effect of iron-based sulfates prepared from FeSO4·7H2O in NO reduction by NH3 under 300-500 ℃ was investigated in this research. The catalytic activity, the selectivity of NH3 and NH3 adsorption were studied using a fixed-bed reactor and in-situ diffuse reflectance infrared Fourier transform spectroscopy （DRIFT） over the iron-based sulfates. The experimental results suggest that, SO： increases the reactivity of iron-based sulfates catalyst and the selectivity of NH3 for NO reduction. The spectra of in-situ DRIFT show that SO2 absorption on catalyst surface increases the BrФnsted acidity of the catalyst and promotes the NH3 adsorption, which can be explained the improvement of the selective catalytic reduction （SCR） activity by SO2. Considering the catalyst reactivity and the selectivity of NH3, 350℃ seems to be the optimum reaction temperature.