CAJ | 학술논문

CaCO3影响选择性非催化还原法脱硝性能。文中采用固定床反应器，结合傅里叶变换红外光谱气体分析仪测量气体组分，研究了温度（650～850℃）、NH3浓度（100×10-6～1500×10-6）和O2浓度（0-4％）对CaCO3催化NH3氧化反应的影响。研究结果表明，CaCO3对NH3氧化反应有催化作用。NH3催化氧化反应的转化率和产物NO的选择性随NH，浓度增加而下降，随温度的增加而增加。生成NO和N2的途径与NH，在CaCO3表面的覆盖度分别成一次关系和二次关系。O2组分对CaCO3作用下NH3转化的速控步影响较小，主要是促进了产物NO选择性的增加。CO2对CaCO3催化NH3氧化反应有微弱抑制作用，CO对CaCO3催化NH3氧化反应没有影响。
CaCO3영향선택성비최화환원법탈초성능。문중채용고정상반응기，결합부리협변환홍외광보기체분석의측량기체조분，연구료온도（650～850℃）、NH3농도（100×10-6～1500×10-6）화O2농도（0-4％）대CaCO3최화NH3양화반응적영향。연구결과표명，CaCO3대NH3양화반응유최화작용。NH3최화양화반응적전화솔화산물NO적선택성수NH，농도증가이하강，수온도적증가이증가。생성NO화N2적도경여NH，재CaCO3표면적복개도분별성일차관계화이차관계。O2조분대CaCO3작용하NH3전화적속공보영향교소，주요시촉진료산물NO선택성적증가。CO2대CaCO3최화NH3양화반응유미약억제작용，CO대CaCO3최화NH3양화반응몰유영향。
CaCO3 influence selective non-catalytic reduction （SNCR） performance. This paper studied the influence of CaCO3 on NH3 oxidation. Experiments were carried out in a fixed bed reactor. Influences of temperature （650-850 ℃）, NH3 concentration （100 × 10-6-1 500 ×10-6） and 02 concentration （0-4%） on NH3 catalytic oxidation were studied. Fourier transform infrared spectroscopy （FTIR） was used to test NH3 and NO concentrations. It was proved that CaCO3 could catalyze NH3 oxidation. NH3 conversion and NO selectivity would decrease when NH3 concentration increases and increases when temperature increases. The reactivity for NO generation and N2 generation are first order and second order to NH3 coverage on CaCO3 separately. The 02 concentration has little effect on NH3 conversion but has NO selectivity increases. CO2 could inhibit NO generation. CO has no effect on NH3 oxidation. KEY WORDS： CaCO3; NH3 oxidation; conversion; selectivity; selective non-catalytic reduction （SNCR）