CAJ | 학술논문

以改性飞灰为载体负载金属氧化物的SCR(选择性催化还原)催化剂已经在实验室里取得了较好的脱硝效果,要达到工业应用的条件,首要解决的是载体的成型问题.对黏结法、低温烧结法和复合挤压法了3种典型的成型方法进行了对比研究发现,改性飞灰和γ-Al2O3经复合挤压成型后,比表面积有了大幅度提高,且强度也能够满足作工业催化剂载体的要求;复合载体负载CuO后,脱硝效率可以达到90%以上,高效温度区间也较宽,从而在应用前景上要好于单纯改性飞灰类催化剂.
이개성비회위재체부재금속양화물적SCR(선택성최화환원)최화제이경재실험실리취득료교호적탈초효과,요체도공업응용적조건,수요해결적시재체적성형문제.대점결법、저온소결법화복합제압법료3충전형적성형방법진행료대비연구발현,개성비회화γ-Al2O3경복합제압성형후,비표면적유료대폭도제고,차강도야능구만족작공업최화제재체적요구;복합재체부재CuO후,탈초효솔가이체도90%이상,고효온도구간야교관,종이재응용전경상요호우단순개성비회류최화제.
The low-cost SCR catalyst by using modified fly ash as a supporter of active metal oxides has achieved good results of de-NOx in the laboratory studies. The molding method of modified fly ash plays an important role in the scale-up of this technology from laboratory to industrial application is concerned．A comparison of three typical molding techniques,agglutinating,low-temperature sintering and composite extrusion,was performed. It is found that mixed modified fly ash and γ-alumina after the extrusion process can achieve wide surface area and high intensity,which meets the requirements of industrial application. When the modified fly ash composite is used to support CuO as a SCR catalyst,the de-NOx efficiency exceeds 90% and a wide temperature window for highefficiency reduction is obtained,which has a promising prospect for industrial de-NOx.